en Light Tower LTC 4 REPAIR MANUAL

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1 en Light Tower LTC 4 REPAIR MANUAL E N

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3 LTC Repair This manual covers the following machines: Item No. Revisions Covered and higher and higher and higher Foreword Operating / Parts Information You must be familiar with the operation of this machine before you attempt to troubleshoot or repair it. Basic operating and maintenance procedures are described in the Operator s Manual supplied with the machine. Keep a copy of the Operator s Manual with the machine at all times. Use the separate Parts Book supplied with the machine to order replacement parts. If you are missing either of the documents, please contact Wacker Corporation to order a replacement. Damage caused by misuse or neglect of the unit should be brought to the attention of the operator to prevent similar occurrences from happening in the future. This manual provides information and procedures to safely repair and maintain the above Wacker model(s). For your own safety and protection from injury, carefully read, understand, and observe all instructions described in this manual. THE INFORMATION CONTAINED IN THIS MANUAL IS BASED ON MACHINES MANUFACTURED UP TO THE TIME OF PUBLICATION. WACKER CORPORATION RESERVES THE RIGHT TO CHANGE ANY PORTION OF THIS INFORMATION WITHOUT NOTICE. 3

4 Foreword LTC Repair WARNING CALIFORNIA Proposition 65 Warning: Diesel engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. All rights, especially copying and distribution rights, are reserved. Copyright 2007 by Wacker Corporation No part of this publication may be reproduced in any form or by any means, electronic or mechanical, including photocopying, without express written permission from Wacker Corporation. Any type of reproduction or distribution not authorized by Wacker Corporation represents an infringement of valid copyrights, and violators will be prosecuted. We expressly reserve the right to make technical modifications, even without due notice, which aim at improving our machines or their safety standards. 4

5 LTC Repair Table of Contents 1. Safety Information Laws Pertaining to Spark Arresters Operating Safety Operator Safety while using Internal Combustion Engines Towing Safety Service Safety Label Locations Safety and Operating Labels Technical Data Engine Generator Machine Operation Information Regarding Operation Locating Trailer Leveling Trailer Adjusting Lights Preparing Trailer for Towing or Lifting Raising Tower (Manual Winch System) Lowering Tower (Manual Winch System) Control Panels Item Control Panels Items and Starting Automatic Shutdown Operating Lights Stopping Receptacles 50 Hz Maintenance Periodic Maintenance Schedule Daily Inspection Installing / Removing Light Fixtures

6 Table of Contents LTC Repair 4.4 Precautions When Replacing / Removing Bulbs Replacing Bulbs Air Cleaner Engine Oil Lombardini Engine Wiring Engine Wiring Components Engine Control Panel Internal Wiring Lombardini Engine Control Panel Components Lombardini Wiring Diagram: 50Hz 230V Components: 50Hz 230V Wiring Diagram: 50Hz 115V Components: 50Hz 115V Wiring Diagram: 50 Hz 230V Components: 50Hz 230V Generator Capacitor Excitation Schematic Trailer Wiring Lombardini Engine Troubleshooting Troubleshooting Flowcharts Engine Does Not Crank Flowchart 3A Checking Keyswitch and Wiring Replacing Keyswitch Engine Cranks But Does Not Start Flowchart 4A Checking Fuel System Checking Voltage to Glow Plugs (Lombardini 1003 engines) Checking Glow Plug Relay Replacing Glow Plug Relay Checking Glow Plugs Engine Shuts Down Flowchart 5A Checking Oil Pressure and Coolant Temperature Switches General Engine Troubleshooting Electrical Troubleshooting Procedures Troubleshooting Methodology Checking Continuity Checking resistance Checking voltage...73 wc_br en_001toc.fm 6

7 LTC Repair Table of Contents 6.5 Troubleshooting Flowcharts Lights do not Illuminate Flowchart 1A Checking Engine Speed Checking Generator Voltage at the Short Terminal Strip Lights Do Not Illuminate Flowchart 1B Checking the Stator Windings Checking the Excitation Winding Checking the Excitation Capacitor Flashing the Generator Removing the Generator Installing the Generator Checking the Rotor Diodes Checking the Rotor Windings Lights do not Illuminate Flowchart 1C Checking Voltage at the Main Circuit Breaker Checking Voltage to Long Terminal Strip Checking Individual Circuit Breakers Confirming a Malfunctioning Circuit Breaker Checking Incoming Voltage to Ballast Capacitor(s) Checking Outgoing Voltage from Ballast Capacitor(s) Confirming a Faulty Ballast Capacitor Checking Wiring to/from Ballast Transformers Replacing Ballast Transformer(s) Checking Voltage at the Receptacle Checking Receptacle s Circuit Breaker Checking the Emergency Stop Switch Troubleshooting the Power Winch Disassembly/Assembly Procedures Tools Ordering Parts Reference Numbers ( ) Weight Block Light Assembly Tower Assembly Exploded View Tower Assembly List of Parts Upper Mast Mid Mast Main Mast Replacing Cable and Winch on Power Winch Models

8 Table of Contents LTC Repair 7.12 Replacing Fuel Tank Replacing Hour Meter wc_br en_001toc.fm 8

9 LTC Repair 1. Safety Information Safety Information This manual contains DANGER, WARNING, CAUTION, NOTICE and NOTE callouts which must be followed to reduce the possibility of personal injury, damage to the equipment, or improper service. This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. DANGER WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. WARNING CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. CAUTION NOTICE: Used without the safety alert symbol, NOTICE indicates a hazardous situation which, if not avoided, could result in property damage. Note: Contains additional information important to a procedure. 1.1 Laws Pertaining to Spark Arresters Notice: State Health Safety Codes and Public Resources Codes specify that in certain locations spark arresters be used on internal combustion engines that use hydrocarbon fuels. A spark arrester is a device designed to prevent accidental discharge of sparks or flames from the engine exhaust. Spark arresters are qualified and rated by the United States Forest Service for this purpose. In order to comply with local laws regarding spark arresters, consult the engine distributor or the local Health and Safety Administrator. 9

10 Safety Information 1.2 Operating Safety LTC Repair WARNING Familiarity and proper training are required for the safe operation of machine. Machines operated improperly or by untrained personnel can be dangerous. Read the operating instructions contained in both this manual and the engine manual and familiarize yourself with the location and proper use of all controls. Inexperienced operators should receive instruction from someone familiar with the machine before being allowed to operate it The area immediately surrounding the Light Tower should be clean, neat, and free of debris ALWAYS be sure the machine is on a firm, level surface and will not tip, roll, slide, or fall while operating NEVER start a unit in need of repair Lower the tower when not in use, or if high winds or electrical storms are expected in the area ALWAYS make certain the machine is well-grounded and securely fastened to a good earthen ground per national and local regulations The tower extends up to 9 m (30 ft.). Make sure the area above the trailer is open and clear of overhead wires and obstructions The bulbs become extremely hot in use! Allow the bulb and fixture to cool minutes before handling Keep the area behind the trailer clear of people while raising and lowering the mast! Never raise, lower or turn the mast while unit is operating! The trailer must be leveled and the outriggers extended before raising the tower. The outriggers must remain extended while the tower is up If for any reason any part of the mast hangs up or the winch cable develops slack while raising or lowering the tower, STOP immediately! Contact an authorized WACKER service representative NEVER remove the mast locking pin while the tower is up! NEVER use the machine if the insulation on the electrical cord is cut or worn through NEVER operate the lights without the protective lens cover in place or with a lens cover that is cracked or damaged! NEVER adjust the mast while the unit is operating NEVER raise the mast or operate the machine in high winds. 10

11 LTC Repair Safety Information 1.3 Operator Safety while using Internal Combustion Engines DANGER Internal combustion engines present special hazards during operation and fueling. Read and follow the warning instructions in the engine owner s manual and the safety guidelines below. Failure to follow the warnings and safety guidelines could result in severe injury or death NEVER operate the machine indoors unless exhaust fumes can be adequately ventilated DO NOT fill or drain the fuel tank near an open flame, while smoking, or while the engine is running ALWAYS refill the fuel tank in a well-ventilated area DO NOT touch or lean against hot exhaust pipes ALWAYS replace the fuel tank cap after refueling DO NOT remove radiator cap when the engine is running or hot. The radiator fluid is hot and under pressure and may cause severe burns! DO NOT use gasoline or other types of fuels or flammable solvents to clean parts, especially in enclosed areas. Fumes from fuels and solvents can become explosive ALWAYS keep the area around the muffler free of debris such as leaves, paper, cartons, etc. A hot muffler could ignite the debris and start a fire. 11

12 Safety Information 1.4 Towing Safety LTC Repair WARNING Towing a large trailer requires special care. Both the trailer and vehicle must be in good condition and securely fastened to each other to reduce the possibility of an accident ALWAYS check that the hitch and coupling on the vehicle are rated equal to, or greater than, the trailer's gross vehicle weight rating (GVWR) ALWAYS inspect the hitch and coupling for wear or damage. DO NOT tow the trailer using defective parts ALWAYS make sure the coupling is securely fastened to the vehicle ALWAYS check the tires on the trailer for tread wear, inflation, and condition. Replace worn tires ALWAYS connect the safety chains ALWAYS make sure directional and trailer lights are connected and working properly ALWAYS check that the lug nuts holding the wheels are tight and that none are missing The maximum recommended speed for highway towing is 72 km/hour (45 MPH). Recommended off-road towing speed is not to exceed 16 km/hour (10 MPH) or less depending on terrain ALWAYS refer to the applicable Department of Transportation regulations before towing. 12

13 LTC Repair 1.5 Service Safety Safety Information WARNING HIGH VOLTAGE! This unit uses high voltage circuits capable of causing serious injury or death. Only a qualified electrician should troubleshoot or repair electrical problems occurring in this equipment ALWAYS replace the safety devices and guards after repairs and maintenance Before servicing the Light Tower, make sure the engine start switch is turned to OFF, the circuit breakers are open (off), and the negative terminal on battery is disconnected. NEVER perform even routine service (oil/filter changes, cleaning, etc.) unless all electrical components are shut down DO NOT allow water to accumulate around the base of the machine. If water is present, move the machine and allow the machine to dry before servicing DO NOT service the machine if your clothing or skin is wet ALWAYS keep hands, feet, and loose clothing away from the moving parts on the generator and engine ALWAYS keep the machine clean and labels legible. Replace all missing and hard-to-read labels. Labels provide important operating instructions and warn of dangers and hazards ALWAYS make sure slings, chains, hooks, ramps, jacks and other types of lifting devices are attached securely and have enough weightbearing capacity to lift or hold the machine safely. Always remain aware of the location of other people around when lifting the machine ALWAYS turn off the light circuit breakers and shut down the engine before disconnecting the light fixtures or changing the light bulbs. 13

14 Safety Information 1.6 Label Locations LTC Repair 14

15 LTC Repair Safety Information 15

16 Safety Information 1.7 Safety and Operating Labels LTC Repair Wacker machines use international pictorial labels where needed. These labels are described below: Ref. Label Meaning A DANGER! A non-secured, falling mast will cause serious injury or death if a person is hit. To secure mast, verify automatic locking pin has engaged to secure tower upright. B WARNING! Avoid crushing area. C WARNING! Completely lower tower before tilting mast. Tilting an extended mast could cause serious injury or death. D DANGER! Contact with overhead electrical power lines will cause serious injury or death. Do not position Light Tower under electrical power lines. 16

17 LTC Repair Safety Information Ref. Label Meaning E CAUTION! Lifting point. F WARNING! Secure mast in transport lock before lifting or towing. A loose swinging mast could cause personal injury or machine damage. G DANGER! Asphyxiation hazard. Read the Operator s Manual for instructions. No sparks, flames, or burning objects near machine. Stop the engine before adding fuel. Use only diesel fuel. H DANGER! Asphyxiation hazard. Read the Operator s Manual for instructions. No sparks, flames, or burning objects near machine. Stop the engine before adding fuel. Use only diesel fuel. DANGER! Contact with overhead electrical power lines will cause serious injury or death. Do not position Light Tower under electrical power lines. WARNING! Completely lower tower before tilting mast. Tilting an extended mast could cause serious injury or death. I DANGER! Electrical storage device within. Contact a qualified electrician for service or to open electrical box. Electric shock will cause serious injury or death. 17

18 Safety Information LTC Repair Ref. Label Meaning J Electrical ground K WARNING! Stand clear of front and rear of machine when mast is being tilted up or down. L WARNING! Hot surface! M A nameplate listing the model number, item number, revision number, and serial number is attached to each unit. Please record the information found on this plate so it will be available should the nameplate become lost or damaged. When ordering parts or requesting service information, you will always be asked to specify the model number, item number, revision number, and serial number of the unit. N WARNING! Ultraviolet radiation from lamp can cause serious skin and eye irritation. Use only with provided undamaged lens cover and fixture. 18

19 LTC Repair Safety Information Ref. O Label P / ) * , ), 2-4 ) ) 7 ) * * ) - ) 7 ), ) ) 6 -, ) ) 0 ) / / , ) ) / / ) 6 1 /, 1-, - 4 / - 5 ) 6 * * 5 / ) ) ), 2 ) 4 ) ) + ) 5 -, * 7 6! ; ) 6 6 ) ) , , ! ) 0 ) / ) 7 /. ) /! ) 5 - / , - ) ) 4 4 ) ) " ) 6 6 ) ). - 6 ; + 0 ) / * / ) , ) " ) * 4 1 / - " ) 5 + ), - ) 5, / 7 4 1, ), # ) 1-4 1/ # ) 0 ) / # ) , , ) / ) , / , ) ) / ) 7, - * 16 1 ), 7 2 1, 5 * 4 7 6, , ) ! ) 6 6 ) ) ) ) " ) 6 6 ) ) 1-5, ) , # ) 2-5, - ) " & ' " 19

20 Safety Information LTC Repair Ref. Q Label 20

21 LTC Repair Safety Information Ref. Label Meaning R Coolant overflow bottle only, not a return system. S WARNING! Pinching hazard. Rotating machinery. Certification Label (VIN Number) Also attached to each unit is a Certification Label. This label specifies that the trailer conforms with all Federal Motor Vehicle Standards in effect at the time of manufacture. The label includes the Vehicle Identification Number (VIN) for the trailer. 21

22 Technical Data 2. Technical Data LTC 4L 2.1 Engine Item Number: LTC 4L - 115V Engine LTC 4L - 230V Make Model Type Lombardini LDW cylinder, 4-cycle, liquid-cooled diesel Maximum power rating kw (Hp) 8.5 (11.4) Operating power rating kw (Hp) 7.6 (10.2) Operating speed (no-load) rpm 1500 Alternator V / A / W 12 / 45 / 540 Battery V/Ah/CCA 12 / 450 Air cleaner type dry-type element Fuel type No. 2 diesel Fuel tank capacity l (gal.) 114 (30) Fuel consumption l (gal.) / hr (0.45) Running time hours 67.7 Coolant capacity l (qts.) 4.7 (5.0) Oil capacity l (qts.) 2.4 (2.5) Oil weight SAE 15W40 CD or higher 22

23 LTC 4L Technical Data Item Number: LTC 4L - 50 Hz Make Engine Lombardini Model LDW1003 Type 3-cylinder, 4-cycle, liquidcooled diesel Maximum power rating kw (Hp) 8.5 (11.4) Operating power rating kw (Hp) 7.6 (10.2) Operating speed (no-load) rpm 1550 Alternator V / A / W 12 / 45 / 540 Battery V/Ah/CCA 12 / 450 Air cleaner type dry-type element Fuel type No. 2 diesel Fuel tank capacity l (gal.) 114 (30) Fuel consumption l (gal.) / hr (0.45) Running time hours 66.7 Coolant capacity l (qts.) 4.7 (5.0) Oil capacity l (qts.) 2.4 (2.5) Oil weight SAE 15W40 CD or higher 23

24 Technical Data LTC 4L 2.2 Generator Item Number: LTC 4L - 115V Rev. 104 and higher LTC 4L - 115V Rev. 103 and lower LTC 4L - 230V Rev. 104 and higher LTC 4L - 230V Rev. 103 and lower Generator Frequency Hz 50 ± 2 Continuous output kw Output volts Amps A Excitation type Capacitor / Brushless Power factor 1.0 Voltage regulation - no load to full load % ± 5.0 Speed rpm 1500 Item Number: LTC 4L - 50 Hz Generator Frequency Hz 50 ± 2 Continuous output kw 5.0 Output volts/phase 230, 1Ø Amps A 21.7 Excitation type Capacitor / Brushless Power factor 1.0 Voltage regulation - no load to full load % ± 5.0 Speed (no-load) rpm

25 LTC 4L 2.3 Machine Technical Data Item Number: LTC 4L - 115V Machine LTC 4L - 230V Height - mast extended m (ft.) 9 (29) Lighting system (1000W) Max. lighting 0.5 ft. candles Sound level at 7 m (23 ft.) Sound pressure level at operator's location (L pa ) Guaranteed sound power level (L WA ) m 2 (ft 2 ) acres db(a) db(a) db(a) 4 metal halide light 30,400 (2824) Item Number: Machine LTC 4L Operating weight (GVWR) Travel Dimensions (l x w x h) kg (lbs.) 818 (1804) cm (in.) 441 x 163 x 160 (173 x 64 x 63) Trailer length cm (in.) 335 (132) Height - mast extended m (ft.) 9 (30) Lighting system (1000W) 4 Ballast Max. lighting 0.5 ft. candles Coil and core m 2 (acres) 30,400 (7) Sound level at 7 m (23 ft.) db(a) 71 Tires size ST175 / 80D13 25

26 Technical Data LTC 4L 26

27 LTC 4L 3. Operation Operation 3.1 Information Regarding Operation 3.2 Locating Trailer The information regarding the operation of the machine included in this manual is condensed. Refer to the Operator s Manual for complete operating instructions. Always read, understand, and follow the procedures in the Operator s Manual when operating the machine. See Graphic: wc_gr For maximum light coverage locate the Light Tower at ground level or in a spot higher than the area being lighted Position the trailer on a firm, flat surface clear of overhead wires and obstructions. Be sure that there is enough area for outrigger extensions to be fully extended Connect the ground stud (l) located on the trailer frame, to a good earthen ground. Consult local codes for proper grounding techniques WARNING The tower extends up to 9 m (30 ft.). Make sure the area above the trailer is open and clear of overhead wires and obstructions. 27

28 Operation 3.3 Leveling Trailer LTC 4L See Graphic: wc_gr001420, wc_gr WARNING The trailer must be leveled and the outriggers extended before raising the tower. The outriggers must remain extended while the tower is up. Failure to level the trailer or extend the outriggers will severely reduce the stability of the unit and could allow the tower to tip and fall Pull the locking pin on the tongue jack (a) and rotate the tongue jack 90 as shown. Make sure the tongue jack snaps into position. Block or chock the trailer wheels (b). Crank the tongue jack down to raise the trailer tongue off the vehicle Pull the outrigger lock pin (c) to release the outrigger. Pull both outrigger extensions (d) out until you feel outrigger lock pin lock back into place. Rotate jacks (e) down until they snap into position Rotate rear jack (f) down, as shown, making sure it snaps into place Extend the jack(s) on the highest side(s) of the trailer until they rest firmly on the ground. Extend the remaining jacks until the trailer is level. 3.4 Adjusting Lights See Graphic: wc_gr Each light fixture can be aimed up, down, left or right. Position each fixture by loosening toolless light adjusters (g) and aiming the light up or down. DO NOT loosen the inside nut (x). Loosening this nut could cause damage to the light fixture. Loosen the nut (h) to turn light fixtures left or right. Tighten adjusters and nuts after positioning the lights. Always return the light fixtures to aim at the ground when mast is in the cradle for towing. 28

29 LTC 4L 3.5 Preparing Trailer for Towing or Lifting Operation See Graphic: wc_gr001423, wc_gr Check that the mast cradle lock pin (j) is in place and secured with the safety pin Ensure that the tower is completely nested inside the transport cradle and the pin (t) is secure Make sure the doors are properly latched Return the outriggers to their travel position. Check that the outrigger bars and jacks are locked in place Crank the rear jack (f) all the way in and rotate it 90. The the Light Tower is now ready to lift. For towing, continue Use the tongue jack (a) to raise the trailer tongue up and then lower it over hitch on towing vehicle. Lock the hitch to coupling and attach the safety chains. Swivel the tongue jack 90 and lock it in place Connect the trailer wiring to the towing vehicle. Check the brake, turn, and tail lights for proper operation Position the light fixtures down (k). For rough, off-road transportation remove bulbs from fixtures to avoid damage Check the tire inflation Attach a red flag to the end of mast before towing. NOTICE: Maximum recommended speed for highway towing is 72 km/hour (45 MPH). Recommended off-road towing speed is not to exceed 16 km/hour (10 MPH) or less depending on terrain. 29

30 Operation 3.6 Raising Tower (Manual Winch System) LTC 4L See Graphic: wc_gr WARNING NEVER raise the mast or operate the Light Tower in high winds. NEVER raise the mast while the engine is running. WARNING HIGH VOLTAGE! DO NOT use the Light Tower if insulation on electrical cord is cut or worn through. Repair or replace the cord before using. Bare wires in contact with the metal frame of the trailer or tower can cause electrocution. DO NOT position the Light Tower under electrical power lines. WARNING NEVER allow anyone to stand near the rear of the unit while raising the mast. The Light Tower includes two separate winches. One for lifting the mast to the vertical position, the other for raising the tower. Each winch is an automatic brake-type winch that automatically brakes when the handle is released. The handle must be rotated to wind in cable as well as unwind cable. WARNING NEVER touch the winch pawl! Releasing the pawl may cause the mast or tower to fall Check winch cables (n) for wear or damage, and make sure they are resting properly in pulleys. Do not use the Light Tower if either winch cable is damaged Remove the cradle locking pin (j) from the cradle Check the operation of the tongue-mounted winch (o) by rotating the winch handle 1/4-turn clockwise ( cable in direction). The winch pawl must engage winch gear teeth. When operating properly, the winch pawl will make a clicking sound when the winch handle is rotated clockwise. Do not attempt to raise the mast if the winch is damaged or not operating properly Continue to rotate the winch handle and raise the mast to the vertical position until the vertical mast locking pin (p) locks the mast in place. Be certain the vertical mast locking pin is fully engaged in the locking position before raising the tower. 30

31 LTC 4L Operation WARNING NEVER pull the vertical mast locking pin (p) while the tower is raised! Releasing the vertical mast locking pin while the tower is raised may cause the tower to fall or the machine to tip over After the mast is in the vertical position, check the operation of the mast-mounted winch (q) by rotating the winch handle 1/4-turn clockwise ( cable in direction). The winch pawl must engage winch gear teeth. When operating properly, it will make a clicking sound when the winch handle is rotated clockwise. Do not attempt to raise the mast if the winch is damaged or not operating properly. Continue rotating the winch handle until mast is at the desired height. Do not over crank the winch when the tower is fully extended. NOTICE: Do not extend the tower beyond the red marking on the mast! Once the tower is at the desired height, rotate the mast to the desired direction. To rotate, loosen rotation locking knob (s). Then using the handle (u), rotate the mast until the lights face the desired direction, and then retighten the rotation locking knob. u j s q n n o p t wc_gr

32 Operation 3.7 Lowering Tower (Manual Winch System) LTC 4L See Graphic: wc_gr WARNING Be sure to read and understand the operating instructions before lowering the tower! If for any reason a part of the mast hangs up or a winch cable develops slack before mast is fully lowered, stop immediately! Continuing to turn the winch handle will increase the slack in the cable. Too much slack could cause the mast to collapse should it suddenly free up. If the mast hangs up, level the trailer. Slightly shake or twist the tower assembly to free the bind. Contact an authorized WACKER service representative immediately. NEVER lower the mast while the unit is operating. WARNING WARNING NEVER allow anyone to stand near the rear of the unit while lowering the mast Turn the lights off. Shut down the engine. NOTICE: Shutting down the engine before turning off the lights could damage floodlight ballasts or generator capacitor(s). NOTICE: Observe power cord while lowering the tower. Make sure the coiled cord is not damaged during the lowering process Lower the tower by turning the handle on the mast-mounted winch (q) counterclockwise ( cable out direction). WARNING NEVER touch the winch pawl! Releasing the winch pawl may cause the mast or tower to fall Loosen the rotation locking knob (s) and using the handle (u), rotate the mast so the lights face the rear of the trailer and the mast-mounted winch is facing toward the trailer tongue. 32

33 LTC 4L Operation Pull and hold the mast locking pin (p). Rotate the handle on the tonguemounted winch (o) counterclockwise ( cable out direction) until the mast spring begins to pivot the mast down. Release the mast locking pin and continue to rotate the handle until the mast is resting in the transport cradle. Be sure that the secondary locking pin (t) penetrates all sections of the mast. WARNING NEVER pull the vertical mast locking pin (e) while the tower is raised! Releasing the locking pin while the tower is raised may cause the tower to fall or the machine to tip over After the mast is down, secure it in the cradle by inserting the cradle lock pin (j). Insert the clip through the pin to secure it in place Position the light fixtures to aim at the ground. NOTICE: Allow the floodlights to cool minutes before moving trailer. Moving the trailer while the lights are still hot could cause the bulbs to break. u j s q n n o p t wc_gr

34 Operation 3.8 Control Panels Item Floodlight Control Panel LTC 4L Engine Control Panel Ref. Description Ref. Description a 50 Amp circuit breaker k High Coolant Temperature Shutdown b 15 Amp lights circuit breaker l Alternator Indicator c 20 Amp GFI circuit breaker m Auxiliary lights (not used) d 250 V, 16 Amp Receptacle n Glow Plug Indicator e Hour Meter o Air Filter Restriction Indicator f Low Fuel Indicator (not used) p Auxiliary lights (not used) g Safety Shutdown Indicator q Key Access Door h Low Oil Pressure Shutdown 34

35 LTC 4L Operation 3.9 Control Panels Items and Floodlight Control Panel Engine Control Panel t t EMERGENCY EMERGENCY STOP d STOP d wc_gr Note: On machine revisions 102 and 103, the generator neutral wire is not connected to the frame ground or Potential Earth (PE). Be informed that this machine is wired with an IT Network. Before connecting this machine to a distribution system, you must consult with a local electrician for wiring codes. Ref. Description Ref. Description a 50 Amp circuit breaker k High Coolant Temperature Shutdown b 15 Amp lights circuit breaker l Alternator Indicator c 20 Amp GFI circuit breaker m Auxiliary lights (not used) d Receptacle n Glow Plug Indicator e Hour Meter o Air Filter Restriction Indicator f Low Fuel Indicator (not used) p Auxiliary lights (not used) g Safety Shutdown Indicator q Key Access Door h Low Oil Pressure Shutdown t Emergency stop switch 35

36 Operation 3.10 Starting LTC 4L See Graphic: wc_gr001068, wc_gr001426, wc_gr Check the engine oil, fuel and coolant levels. Note: If the fuel tank was drained or run dry it may be necessary to bleed the fuel lines. Refer to the Engine Operator s Manual Check the condition of the electrical cable on the mast. Do not start the generator if the insulation on the cable is cut or worn through Check that the circuit breakers (a, b, c) are in their OFF position. NOTICE: Starting the engine under load will damage the machine On machines equipped with the Lombardini engine, turn the key (q) one click to the right. The glow plug indicator (n) will illuminate until the engine is properly preheated. This is an automatic timer based on the engine temperature. Crank the engine immediately after the glow plug light goes off Turn the key (q) to START and hold until the engine starts. Release the key after engine starts. NOTICE: Do not crank the engine longer than 10 seconds. This could cause starter motor to overheat. Return switch to OFF and wait seconds for the starter motor to cool down before attempting to preheat and restart. Note: If the oil pressure is not obtained within 30 seconds after the key is turned to RUN, the automatic shutdown system will shut off the fuel supply. You must return the key to the OFF position to restart the 30 second timer before attempting to restart the engine Allow the engine to warm up before operating the floodlights Automatic Shutdown This unit is equipped with a low oil, high temperature auto-shutdown system. This system will automatically shut off the fuel supply to the engine if the oil pressure drops too low or the engine exceeds normal operating temperatures. Return the key switch to OFF to reset the unit after an engine shutdown. 36

37 LTC 4L 3.12 Operating Lights Operation See Graphic: wc_gr001068, wc_gr001426, wc_gr Turn on the circuit breaker (a) first, then turn each circuit breaker (b) to ON, one at a time. Metal halide floodlights require a warm-up time of 5 15 minutes before they reach full output. If the floodlights are shut down, a 10-minute cool-down period is required before turning them back on. High pressure sodium floodlights require 1 2 minutes to start and 2 5 minutes of cooldown time to restart Stopping See Graphic: wc_gr001068, wc_gr001426, wc_gr Turn the circuit breakers (a, b, c) off and remove any other loads from the generator. NOTICE: Never shut down the engine without turning off the lights. Damage to the generator will occur Turn the key (q) to OFF Receptacles 50 Hz See Graphic: wc_gr and wc_gr The control panel is equipped with a convenience receptacle for running accessories and tools from the generator. Power to this receptacle is available any time the engine is running and the circuit breaker is ON. NOTICE: Do not draw more than 2000 Watts from the receptacle with all of the lights on. A 20A circuit breaker (c) protects the 250V ( ), 115V ( ) receptacle (d). 37

38 Maintenance 4. Maintenance LTC Repair 4.1 Periodic Maintenance Schedule Before each use Every 125 hours Every 250 hours Every 500 hours Every 1000 hours or two years Check for fluid leaks. Check engine oil. Check fuel level. Replace air filter if indicator light is on.** Change engine oil.* Check level of battery electrolyte. Check condition and tension on fan belt. Check condition of radiator hoses. Replace oil filter.* Replace fuel filter. Flush radiator. Replace fan belt. Check valve clearance. Remove sediment in fuel tank. Change radiator coolant. Replace battery. Replace radiator hoses and clamps. Replace fuel pipes and clamps. * Change engine oil and filter after first 50 hours of operation. ** Replace air filter after air filter restriction switch indication or one year. Lombardini does not recommend the removal of air filter elements for purposes of inspection. 38

39 LTC Repair 4.2 Daily Inspection Maintenance Check for fluid leaks. Check fluid levels Inspect condition of electrical cords. Do not use light tower if insulation is cut or worn through Check that winch cables are in good condition. Do not use a cable that is kinked or starting to unravel Check that the vertical mast locking pin and its spring are secured, aligned, and operating properly. 39

40 Maintenance 4.3 Installing / Removing Light Fixtures LTC Repair See Graphic: wc_gr WARNING ALWAYS turn off the light circuit breakers and shut down the engine before disconnecting the light fixtures or changing the light bulbs. WARNING The bulbs become extremely hot in use! Allow the bulb and the fixture to cool minutes before handling them Remove the fixtures by disconnecting the electrical wiring at the junction box (a). NOTICE: Only a trained technician should be allowed to install and remove the fixture wiring Remove the nuts (b) from the fixture mounting brackets and remove both the fixture and the bracket off the stud Adjusting clamps (c) may be moved from side to side as desired by unscrewing them and swapping positions with the locknut on the oppositie side of the fixture. a a b b c c 50Hz 60Hz wc_gr

41 LTC Repair 4.4 Precautions When Replacing / Removing Bulbs Maintenance The Light Tower uses four 1000W bulbs. When replacing or removing the bulbs, avoid leaving any grease or oil residue on the glass surface. This can create hot spots, reducing the service life of the bulb or causing the outer jacket to burst. WARNING ALWAYS turn off the light circuit breakers and shut down the engine before disconnecting the light fixtures or changing the light bulbs. Bulbs become extremely hot in use! Allow the bulb and fixture to cool minutes before handling. WARNING NEVER operate the lights without the protective lens cover in place or with a lens cover that is cracked or damaged! The lamps used in the floodlights produce high temperatures and operate under pressure. They are subject to failures where the outer jacket bursts and shatters, resulting in a discharge of extremely hot glass particles. These particles pose a risk of personal injury, property damage, burns and fire. WARNING Ultraviolet radiation from the lamp can cause serious skin and eye irritation. Use the lamp only with provided undamaged lens cover and fixture. 41

42 Maintenance 4.5 Replacing Bulbs LTC Repair See Graphic: wc_gr Removal: Shut down the engine and allow the bulb to cool Remove the screws (a) securing the flange rings (b) and remove the flange rings Remove the lens (c) with the gasket (d) attached Remove the hardware securing one side of the bulb stabilizer (e). Once removed, swing the bulb stabilizer to the side and unscrew the bulb (f). Installation: Insert the bulb and secure it with the bulb stabilizer (e) Install the gasket (d) around the lens (c) and secure the lens to the reflector with flange ring (b) and screws (a). c e d a b f wc_gr

43 LTC Repair 4.6 Air Cleaner Maintenance See Graphic: wc_gr Replace the air filter cartridge when the indicator (o) mounted on the control panel appears Open air cleaner and remove element To clean the filter, lightly tap on a hard surface to eliminate all excess dirt. Do not blow the paper filter element with compressed air to clean. Clean the filter cover and support carefully Reassemble the filtering element and air cleaner. wc_gr wc_gr Engine Oil See Graphic: wc_gr Drain the oil while the engine is still warm. Note: In the interests of environmental protection, place a plastic sheet and a container under the machine to collect any liquid which drains off. Dispose of this liquid in accordance with environmental protection legislation Remove the oil drain plug Allow the oil to drain Install the oil drain plug Fill the engine crankcase through the oil filler opening, to the upper mark on the dipstick. See Technical Data for oil quantity and type Install the oil filter cap. 43

44 Maintenance LTC Repair Lombardini Engine Wiring R x x x x B+ Pr L L G G B Or Or B B D+ W 12V/45A wc_gr P/B L L B 6

45 LTC Repair 4.9 Engine Wiring Components Maintenance Ref. Description Ref. Description Ref. Description 1 Emergency stop switch (50 Hz only) 7 Air filter restriction indicator (normal open type) 13 Harness connector (alternator) 2 Glow plugs 8 Terminal strip 14 Diode 3 Starter motor 9 Low oil pressure switch 15 Resistors (2x220 Ohm, 0.6 W) 4 Battery 10 High coolant temperature switch (normal open type) 5 Alternator connector 11 Harness connector (control panel) 16 Control panel 17 Control panel connector 6 Fuel pump 12 Alternator x Not used 45

46 Maintenance 4.10 Engine Control Panel Internal Wiring Lombardini LTC Repair 4 S3 13 S2 S EV 3 R/W (Max 0,8A) S1 ACC 6 V (Max 10A) "A" (12V) L a b Or d Br G W Gr G Y L P W/L R R R R Y R R 5 B (Max 12A) c S5 Y/G 70A "B" (Max 50A) B 7 R f e Y "A" "B" LL B wc_gr Ref. Description Ref. Description a Key switch d Engine protection b 15A fuse e Preheating c 80A fuse f Relay Wire Colors B Black R Red Y Yellow Or Orange G Green T Tan Br Brown Pr Purple L Blue V Violet Cl Clear Sh Shield P Pink W White Gr Gray LL Light blue 46

47 LTC Repair 4.11 Engine Control Panel Components Lombardini Maintenance a 1 a 2 b 50 c 30 e g j d f wc_gr Ref. Description Ref. Description a1 Engine control panel, front view f System fuse 80A a2 Engine control panel, rear view g Key access door b Solid-state glow plug controller and indicating lamps h Auxiliary connections c Shutdown relay location i Light switch panel connection d Glow plug relay j 15A fuse e Key switch

48 Maintenance 4.12 Wiring Diagram: 50Hz 230V LTC Repair i b p q r W G/Y Or Or L L h wc_gr

49 LTC Repair 4.13 Components: 50Hz 230V Maintenance e Ref. Description Ref. Description a Generator j Receptacle, 230V b Main circuit breaker k Hour meter c Junction box m Floodlight capacitor, 30µF d Floodlights n Ballast/transformer e Terminal strip, long o Battery f Circuit breaker, 20A p Generator capacitor, 35µF g Circuit breaker, 15A q Starter solenoid h Engine r Alternator i Terminal strip, short Wire Colors B Black R Red Y Yellow Or Orange G Green T Tan Br Brown Pr Purple L Blue V Violet Cl Clear Sh Shield P Pink W White Gr Gray LL Light blue 49

50 Maintenance 4.14 Wiring Diagram: 50Hz 115V LTC Repair p h + q o W Or Or L L Or P/B i wc_gr

51 LTC Repair 4.15 Components: 50Hz 115V Maintenance Ref. Description Ref. Description a Generator k Hour meter b Terminal strip, long m Floodlight capacitor, 30µF c Main circuit breaker n Ballast/transformer d Floodlights o Alternator e Receptacle p Terminal strip, short f Circuit breaker, 20A q Starter solenoid g Circuit breaker, 15A r Emergency stop switch h Battery s Fuel solenoid i Engine t Generator capacitor, 35µF j Junction box Wire Colors B Black R Red Y Yellow Or Orange G Green T Tan Br Brown Pr Purple L Blue V Violet Cl Clear Sh Shield P Pink W White Gr Gray LL Light blue 51

52 Maintenance 4.16 Wiring Diagram: 50 Hz 230V LTC Repair p h + q o W Or Or L L Or P/B i wc_gr

53 LTC Repair 4.17 Components: 50Hz 230V Maintenance Ref. Description Ref. Description a Generator k Hour meter b Terminal strip, long m Floodlight capacitor, 30µF c Main circuit breaker n Ballast/transformer d Floodlights o Alternator e Receptacle p Terminal strip, short f Circuit breaker, 20A q Starter solenoid g Circuit breaker, 15A r Emergency stop switch h Battery s Fuel solenoid i Engine t Generator capacitor, 35µF j Junction box Wire Colors B Black R Red Y Yellow Or Orange G Green T Tan Br Brown Pr Purple L Blue V Violet Cl Clear Sh Shield P Pink W White Gr Gray LL Light blue 53

54 Maintenance 4.18 Generator Capacitor Excitation Schematic LTC Repair + 8 Rectified Output 1 Excitation 2 120V T1 + 8 Rectified Output V 240V T2 COMMON T3 Excitation T C1 5 7 wc_gr Ref. Description Ref. Description 1 Rotor winding 5 Rotor 2 Stator winding 6 Short terminal strip 3 Excitation winding 7 Stator 4 Excitation capacitor 8 Rotor diode 54

55 LTC Repair 4.19 Trailer Wiring Maintenance 55

56 Lombardini Engine Troubleshooting 5. Lombardini Engine Troubleshooting LTC Repair 5.1 Troubleshooting Flowcharts The troubleshooting flowcharts are designed to take you through the process of determining the source of a problem with engine starting or machine operation. Many of the tests involve live voltages and therefore should only be attempted by qualified personnel. Detailed procedures for carrying out the tests are included in this manual. All highlighted text within the flowcharts have matching sections in this manual. 56

57 LTC Repair Lombardini Engine Troubleshooting 5.2 Engine Does Not Crank Flowchart 3A Engine Does Not Crank Check battery voltage. Does battery measure V? Yes Check connection of black wire at starter solenoid. Also check wire connections at back of keyswitch. See Checking Keyswitch and Wiring. No Recharge or replace battery. Reconnect black wire. No Is the black wire connected? Yes Clean and tighten connections. No Are connections clean and tight? Yes Check for battery voltage between terminal 30 of keyswitch and ground. Repair wiring from terminal 30 to battery. No Is battery voltage measured between 30 and ground? Yes Check for battery voltage between terminal 50 and ground when key is placed in the START position. Check for battery voltage between black wire at starter solenoid and ground when key is in START position. Yes Is battery voltage measured between 50 and ground? Consult Lombardini Engine Repair Manual. Yes Is battery voltage measured between black wire and ground? No Replace keyswitch. No Repair/replace black wire. wc_gr

58 Lombardini Engine Troubleshooting 5.3 Checking Keyswitch and Wiring LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct these tests When troubleshooting Lombardini engines that do not crank, check that the B (black) wire (a) is connected to the starter solenoid Remove the screws securing the control panel (b) to the mounting bracket and remove the control panel from the bracket Remove the back cover (c) of the control panel box and check that the the wiring to the keyswitch (d) is clean and tight. Check that the appropriate wires are connected to the proper terminals of the keyswitch Check for 12V (battery voltage approximately 12) between terminal 30 of keyswitch and ground. If no voltage is measured, repair wiring back to battery. If voltage is measured, continue Place the keyswitch in the START position and check for 12V (battery voltage approximately 12) between terminal 50 of the keyswitch and ground. If no voltage is measured, replace the keyswitch. If voltage is measured, continue Place the keyswitch in the START position and check for 12V (battery voltage approximately 12) between the B (black) wire (a) and ground at the starter solenoid. If no voltage is measured, repair the wiring between terminal 50 of the keyswitch and the starter solenoid. If voltage is measured and the engine still will not crank, there is a problem with the starter motor. See the Lombardini Engine Repair Manual for further information. 58

59 LTC Repair Lombardini Engine Troubleshooting a b c d V 15/54 50 L 30 B wc_gr

60 Lombardini Engine Troubleshooting 5.4 Replacing Keyswitch LTC Repair See Graphic: wc_gr Disassembly: Shut down the engine and disconnect the battery Remove the six screws securing the control panel cover to the control panel Make note of the wire connections on the keyswitch and remove the wires (a) from the keyswitch Unscrew the locking ring (b) and remove the keyswitch from the control panel. Reassembly: Insert the replacement keyswitch into the control panel and secure it with the locking ring (b) Attach the wires (a) to the appropriate terminals of the keyswitch Secure the control panel cover to the control panel with the six screws. b a V 50 15/54 L 30 B wc_gr

61 LTC Repair Lombardini Engine Troubleshooting 5.5 Engine Cranks But Does Not Start Flowchart 4A Engine Cranks But Does Not Start Make sure that the machine has fresh fuel and that the fuel filter and fuel hoses are in good condition. Check battery condition. Replace battery. No Does battery provide correct voltage and CCA? Yes Check if fuel flows from inlet hose when engine is cranking. See Checking Fuel System Check fuel solenoid wiring. No Does fuel flow from inlet hose? Gravity feed fuel through fuel intake hose. Yes Is fuel pump solenoid operating? Yes No Check glow plugs. See Checking Glow Plugs. Consult Lombardini Engine Repair Manual. Yes Do glow plugs operate correctly? No Check glow plug relay. See Checking Glow Plug Relay. Replace glow plugs. Yes Does glow plug relay operate correctly? No Replace glow plug relay. wc_gr

62 Lombardini Engine Troubleshooting 5.6 Checking Fuel System LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct these tests. When troubleshooting Lombardini engines that crank but do not start, make the following checks Check that the battery is in good condition and that all connections are clean and tight. If the battery voltage falls below 11.5V, replace the battery Fill the fuel tank with fresh fuel and check that the fuel hoses and fuel filter are clean and in good condition Disconnect the fuel intake hose (a). Have a suitable container ready to catch the fuel. Place the keyswitch in the START position and check if the fuel flows from the hose. If fuel flows from the hose, reconnect the hose. If fuel does not flow from the hose, continue Disconnect the power lead (b) to the fuel solenoid. Place the keyswitch in the START position and check for battery voltage between the lead and ground. If battery voltage is not measured, check the continuity of wiring. See the Lombardini Engine Repair Manual for further information. If battery voltage is measured, check the power to the glow plugs. a b wc_gr

63 LTC Repair Lombardini Engine Troubleshooting 5.7 Checking Voltage to Glow Plugs (Lombardini 1003 engines) See Graphic: wc_gr To check the voltage to the glow plugs, carry out the following procedure: Disconnect the B (black) wire (a), place the keyswitch in the START position, and measure the voltage between the black wire and ground. There should be 12V (battery voltage approximately 12) measured. If 12V is measured, check the function of the glow plug. If 12V is not measured, continue Disconnect the B (black) wire (b) and measure the voltage between it and ground. There should be 12V (battery voltage approximately 12) measured. If 12V is measured, clean the connection points of the wires. Reconnect the wires and check the function of the glow plug. If 12V is not measured, check the glow plug relay. a b wc_gr

64 Lombardini Engine Troubleshooting 5.8 Checking Glow Plug Relay LTC Repair See Graphic: wc_gr Remove the screws securing the engine control panel. Leave all wiring connected to the control panel Rotate the control panel to gain access to the rear of the control panel. Remove the enclosure cover to access the glow plug relay Place the keyswitch in the START position. A working relay will click when the keyswitch is in the START position. Check the continuity across the blue (L) and black (B) wires when the keyswitch is in the START position. If there is no continuity, the relay is faulty; replace it. 5.9 Replacing Glow Plug Relay See Graphic: wc_gr Make note of the wire positions and disconnect all wires from the glow plug relay Bend back the tabs (a) securing the glow plug relay (b) and pull the glow plug relay from the enclosure. 64

65 LTC Repair 5.10 Checking Glow Plugs See Graphic: wc_gr Remove the glow plug from the engine. WARNING Lombardini Engine Troubleshooting Burn hazard. Glow plugs can reach temperatures up to 1200 F (649 C). Do not touch the element of the glow plug. Be extremely careful when testing the glow plug Using 10-gauge wire, apply 12VDC to the glow plug positive on the upper portion and ground the base. If the glow plug does not heat (glow) within five seconds, replace the glow plug. Note: If any one of the glow plugs needs replacing, replace all of them. 65

66 Lombardini Engine Troubleshooting 5.11 Engine Shuts Down Flowchart 5A LTC Repair Engine Shuts Down Check engine oil level. Is machine oil level correct? No Fill machine with oil. Yes Check engine coolant level. Is engine coolant level correct? No Yes Check wiring of oil pressure switch. Check wiring of coolant temperature switch. See Checking Oil Pressure and Coolant Temperature Switches. Fill engine with correct amount and type of coolant. Is oil pressure switch connected correctly? No Connect oil pressure switch and/or repair wiring. Yes Is coolant temperature switch connected correctly? No Connect coolant temperature switch and/or repair wiring. Yes Refer to the Lombardini Engine Repair Manual. Call Wacker Corporation Service. wc_gr

67 LTC Repair Lombardini Engine Troubleshooting 5.12 Checking Oil Pressure and Coolant Temperature Switches See Graphic: wc_gr If the engine starts but shuts down after approximately 10 seconds, check the following Check the engine oil level and add oil if necessary. Also check the coolant temperature. If the coolant temperature is high, allow the engine to cool. Flush and fill the radiator with the correct coolant Check the wiring of the oil pressure switch (a) and the coolant temperature switch (b) (903 engines) or (c) (1003 engines). If the wiring of either switch is shorted to ground, the engine will shut down. Be sure the switches are functioning check each for continuity. The oil pressure switch is a normally closed (NC) switch that should have continuity when the engine is off. If the switch has no continuity when the engine is off, the switch is faulty; replace it. The high coolant temperature switch is a normally open (NO) switch. This switch should have no continuity when the engine is off. If this switch has continuity when the engine is off, it has shorted and is faulty; replace it. a b c wc_gr

68 Lombardini Engine Troubleshooting 5.13 General Engine Troubleshooting LTC Repair Possible Cause Symptom Engine will not crank Engine does not start Engine starts, but stops Poor acceleration Unsteady rpm Black smoke White smoke Blue smoke Low oil pressure Oil level rising Excessive oil consumption Wet exhaust Overheating Engine knocks Low fuel level Fuel supply/return lines clogged Clogged fuel tank vent Fuel pump faulty Fuel contaminated with air Unit injector(s) faulty/worn Unit injector settings incorrect Injection pump rack sticking Oil level too high Improper oil viscosity Oil diluted by fuel Oil pressure relief valve faulty Oil pick-up tube clogged Oil pump air contaminated at pick-up tube Glow plugs faulty Glow plug controller faulty Glow plug relay inoperable Starter defective 68

69 LTC Repair Possible Cause Lombardini Engine Troubleshooting Symptom Engine will not crank Engine does not start Engine starts, but stops Poor acceleration Unsteady rpm Black smoke White smoke Blue smoke Low oil pressure Oil level rising Excessive oil consumption Wet exhaust Overheating Engine knocks Battery voltage too low Battery/battery cable connections corroded Key switch defective Air filter clogged Excessive idle/light load operation Incomplete engine run-in Engine overloaded Excessive secondary load Valve lash insufficient/ excessive Injection timing out of spec - advanced Injection timing out of spec - retarded Governor linkage adjustment incorrect Governor spring fatigued or defective Idle rpm too low Piston rings worn or stuck Piston worn or damaged Cylinders worn or damaged Valve/valve guides worn 69

70 Lombardini Engine Troubleshooting LTC Repair Possible Cause Symptom Engine will not crank Engine does not start Engine starts, but stops Poor acceleration Unsteady rpm Black smoke White smoke Blue smoke Low oil pressure Oil level rising Excessive oil consumption Wet exhaust Overheating Engine knocks Valves sticking Bearings (main/rod) worn Governor/governor linkage malfunctioning Cylinder head gasket damaged Thermostat stuck or malfunctioning Engine seized Radiator clogged (external or internal) Coolant pump faulty Turbocharger faulty 70

71 LTC Repair Notes Lombardini Engine Troubleshooting 71

72 Electrical Troubleshooting Procedures 6. Electrical Troubleshooting Procedures LTC Repair 6.1 Troubleshooting Methodology If a lighting problem is not an obvious burnt bulb, engine speed, or wire fault, the cause of the problem will be associated with one of two things: 1) a malfunctioning generator, or 2) faults in the circuit supplying voltage to the lights. By starting the troubleshooting procedures with the smaller terminal strip (the terminal strip where the wires from the generator are connected) you can determine whether the problem lies within the generator, or if the problem lies with the circuit supplying the lights. For troubleshooting a malfunctioning generator, you will need to rule out a demagnetized rotor or problems with: the generator s excitation capacitor, the stator windings, the rotor diodes, and finally the rotor windings. For troubleshooting the lighting circuit, you will need to rule out problems with: the main circuit breaker, the long terminal strip, the individual circuit breakers, the ballast transformer, the lighting ballast capacitors, and the wiring that connects all the components. Detailed procedures for making the tests are included in the upcoming sections of this manual. 72

73 LTC Repair 6.2 Checking Continuity Electrical Troubleshooting Conduct continuity tests when the engine is shut down. When checking continuity, use the Ohm setting on your multimeter. Place a lead of the multimeter on one end of the wiring or component and the other lead on the opposite end. If your meter reads OL or OPEN, there is no continuity and the wiring or component must be repaired or replaced. Note: Some multimeters also have an audio signal setting for determining continuity. This setting may also be used. If your meter reads less than 1.0 Ohm, or the audio signal sounds, the wiring or component has continuity and should be OK. If your meter reads more than 1.0 Ohm, the wiring is faulty and must be repaired or replaced. 6.3 Checking resistance 6.4 Checking voltage Conduct resistance checks when the engine is shut down. Use the Ohm setting on your multimeter. Conduct resistance checks when the machine is as close to 21 C (70 F) as possible. Higher temperatures can affect resistance values. Most digital multimeters have some internal resistance. To obtain your multimeter s internal resistance, simply cross the two leads of your multimeter and read the display. When conducting a resistance check, subtract your multimeter s internal resistance from the value you measure to obtain the true resistance of the component you are checking. Conduct voltage checks when the engine is running. Use the Volt setting on your multimeter. To prevent damage to your instrument, start with the highest scale available on your multimeter. Adjust to a lower scale as readings dictate. Use extreme caution when checking voltage to reduce the risk of electric shock. 73

74 Electrical Troubleshooting Procedures 6.5 Troubleshooting Flowcharts LTC Repair The troubleshooting flowcharts are designed to take you through the process of determining the source of a problem with engine starting or machine operation. Many of the tests involve live voltages and therefore should only be attempted by qualified personnel. Detailed procedures for carrying out the tests are included in this manual. All highlighted text within the flowcharts have matching sections in this manual. 74

75 LTC Repair Electrical Troubleshooting 6.6 Lights do not Illuminate Flowchart 1A Light(s) Do Not illuminate Is/are circuit breaker(s) in closed position? Yes No Close circuit breaker(s). Are bulbs black or burnt? No Yes Replace bulbs. Is wiring connected at quickdisconnects? No Connect quick-disconnects. Yes Check engine speed. See Checking Engine Speed. Is engine speed correct? Yes No Check engine rpm with a photo tach or vibrotach (Sirometer (wire whip)). If rpm is low: 1. Change engine air and fuel filters. 2. If necessary, reposition speed control lever on injection pump. Check voltage from generator to the short terminal strip. See Checking Generator Voltage at the Short Terminal Strip. Is 120V±10% measured across each winding? Yes See Flowchart 1B No See Flowchart 1C wc_gr

76 Electrical Troubleshooting Procedures 6.7 Checking Engine Speed LTC Repair See Graphic: wc_gr001625, wc_gr001634, and wc_gr Using either a photo (strobe) tachometer, a frequency meter (60Hz = 1800 rpm; 50Hz = 1500 rpm), or a vibration tachometer such as a Sirometer (a) (Wacker P/N ), check engine rpm. Refer to the instrument instructions. If necessary, adjust engine rpm using adjusting screw [(b) Lombardini engines, (c) CAT engines]. No load engine speed should be 1850 rpm for 60Hz and 1550 rpm for 50Hz models. NOTICE: Do not adjust the engine speed to be higher than that listed above. The electrical components are frequency sensitive. Running at higher speeds will lead to component damage. Also check the condition of the engine air, fuel, and oil filters. Change the filters if necessary. See maintenance section. 76

77 LTC Repair Electrical Troubleshooting a b wc_gr wc_gr c wc_gr

78 Electrical Troubleshooting Procedures 6.8 Checking Generator Voltage at the Short Terminal Strip See Graphic: wc_gr WARNING LTC Repair Electric shock hazard. Only qualified personnel should conduct this test. A quick way to check the function of the generator is to check the voltage at the short terminal strip (a). If the correct voltage is present, problems with the lights not functioning will be associated with the circuit from the short terminal strip to the lights and not with the generator. To check the voltage at the short terminal strip, carry out the following procedure: Turn off the lights and shut down the machine Remove the screws that secure the control panel cover to the control box. Remove the control panel cover and place it securely on the fender of the trailer so it will not fall when the engine is started Place all circuit breakers in the OFF position and start the engine Using the AC volt scale on a multimeter, measure the voltage across the wires labelled 1 and 2. Also measure the voltage across the wires labelled 3 and 4. There should be 120V±10% measured in each position. If 120V±10% is measured, the generator is functioning properly. If 120V±10% is not measured, check the resistance of the stator windings. See section Checking the Stator Windings Measure the voltage across the wires labelled 1 and 4. There should be 230V±10% measured. If 230V±10% is measured, the wiring to the short terminal strip is functioning properly. If 230V±10% is not measured, repair the jumper across the terminals where wires 2 and 3 are connected. 78

79 LTC Repair Electrical Troubleshooting a F m V F m V A A V- COM V- COM wc_gr

80 Electrical Troubleshooting Procedures 6.9 Lights Do Not Illuminate Flowchart 1B LTC Repair With wiring disconnected at short terminal strip, check resistance of stator windings. See Checking Stator Windings. Are stator windings OK? Yes Check resistance of excitation winding. See Checking Excitation Winding. No Replace the stator. Replace the stator. No Is excitation winding OK? Yes Check the excitation capacitor. See Checking the Excitation Capacitor. Flash the generator. See Flashing the Generator. Yes Is the excitation capacitor OK? Is the generator functioning? Yes See Flowchart 1C No No Replace the excitation capacitor. Remove the generator and check the rotor diodes. See Checking the Rotor Diodes. Are the diodes OK? No Remove the generator and check the rotor windings. See Checking the Rotor Windings. No Replace both diodes. Are the windings OK? Yes No Replace the rotor. See Flowchart 1C wc_gr

81 LTC Repair Notes Electrical Troubleshooting 81

82 Electrical Troubleshooting Procedures 6.10 Checking the Stator Windings LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. The stator consists of three separate windings. Two of the windings are tapped for power. The third provides excitation to the rotor. This third winding is known as the excitation winding. To check the stator windings, carry out the following procedure: Turn off the lights and shut down the machine Remove the screws that secure the control panel cover to the control box. Remove the control panel cover and place it securely on the fender of the trailer. So it will not fall when the engine is started Disconnect the wires labelled 1, 2, 3, and 4 from the short terminal strip (a). These are the stator winding leads Using the Ohms scale on a multimeter, measure the resistance across wires labelled 1 and 2. Also measure the resistance across wires labelled 3 and 4. There should be 0.4±0.2 Ohms measured across each pair. If 0.4±0.2 Ohms is not measured, the winding has failed; replace the stator. If 0.4±0.2 Ohms is measured, continue Measure the resistance (continuity) between each winding lead (wire) and a common ground. If resistance (continuity) to ground exists, the winding has failed; replace the stator. If there is no continuity (resistance) to ground, the winding is OK Measure the resistance (continuity) across wires labelled 2 and 3. If resistance (continuity) exists, the winding has failed; replace the stator. If there is no continuity (resistance) to ground, the stator windings are OK. 82

83 LTC Repair Electrical Troubleshooting a F V F V 20M 2M 200k 20k 2k 200 A 20M 2M 200k 20k 2k 200 A V- COM V- COM wc_gr

84 Electrical Troubleshooting Procedures 6.11 Checking the Excitation Winding LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. The stator consists of three separate windings. Two of the windings are tapped for power. The third provides excitation to the rotor. This third winding is known as the excitation winding. To check the excitation winding, carry out the following procedure: Turn off the lights and shut down the machine Remove the screws that secure the control panel cover to the control box. Remove the control panel cover and place it securely on the fender of the trailer Disconnect the wires from the excitation capacitor (a). These are the excitation winding leads Using the Ohms scale on a multimeter, measure the resistance across the two wires. There should be 2.2±0.5 Ohms measured. If 2.2±0.5 Ohms is not measured, the winding has failed; replace the stator. If 2.2±0.5 Ohms is measured, continue Measure the resistance (continuity) between each winding lead (wire) and a common ground. If resistance (continuity) to ground exists, the winding has failed; replace the stator. If there is no continuity (resistance) to ground, the winding is OK. 84

85 LTC Repair Electrical Troubleshooting F V a 20M 2M 200k 20k 2k 200 A V- COM F V 20M 2M 200k 20k 2k 200 A V- COM wc_gr

86 Electrical Troubleshooting Procedures 6.12 Checking the Excitation Capacitor LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. The excitation capacitor (a) is mounted inside the control panel. To check the excitation capacitor, carry out the following procedure: Turn off the lights and shut down the machine Remove the screws that secure the control panel cover to the control box Remove the leads from the capacitor and discharge it by placing the blade of an insulated screwdriver across the two spades of the capacitor Using a multimeter set to the Farad (F) or capacitance (C) scale (200 µf), measure the capacitor s capacitance. The capacitor should measure 25±1.25 µf on 60Hz machines; 35±1.25 µf on 50Hz machines. If the reading is not within this range, replace the capacitor. If the capacitor measures within the above range, it is OK. An alternative capacitor check is to set the multimeter to the 10,000 Ohm scale when checking the capacitor. Observe the reading. If the reading starts out very low (5.0 Ohms) and continues to climb to an overload or open reading, the capacitor may be OK. Double check by installing the capacitor in a known-to-be-working Light Tower. If the known-to-be-working Light Tower operates correctly, the capacitor is OK. A second alternative check would be to try a known-to-be-working capacitor in the original Light Tower. If the Light Tower still does not produce power, the problem is within the generator. 86

87 LTC Repair Electrical Troubleshooting a F 2n 200p 20n V F 2n 200p 20n V 200n 2 µ 20 µ 200n 2 µ 20 µ 200 µ 2000 µ 20m 200 µ 2000 µ 20m A A V- COM V- COM 60Hz 50Hz wc_gr

88 Electrical Troubleshooting Procedures 6.13 Flashing the Generator LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. These procedures require two 14-gauge jumper wires and a fullycharged 12V or 9V battery. If you measured 0 (zero) volts at the short terminal strip, the generator may have lost its residual magnetism. Try restoring the magnetism (flashing) to the generator before conducting in-depth tests. Flashing the generatior serves two purposes: 1) it restores rotor magnetism and 2) it confirms a working rotor (winding and diodes). By flashing the generator with a known DC voltage, a predictable output voltage is produced. For example, using a 12V battery produces an output voltage of Volts per winding; using a 9V battery produces 8 11 Volts per winding. Start this test with the engine shut down Remove the control panel cover Unplug the two wires from the excitation capacitor (a). Electric shock and burn hazard. If using the machine s 12V battery, check for continuity between the excitation capacitor leads and common ground. If continuity exists, do not continue this procedure. The battery will be shorted which will result in machine damage and possible personal injury Using 14-gauge or larger wire, connect two jumper wires to the battery, one to each terminal. Once connected to the battery, do not allow the two jumpers to touch each other. Explosion hazard. Do not create sparks near the battery. CAUTION WARNING Start the engine Connect the battery jumper leads to the excitation wires connect either lead to either wire. This is a non-polar connection Using the AC-voltage setting on the multimeter, check the voltage across the winding wires labelled 1 and 2 of the short terminal strip. Also check across the winding wires labelled 3 and 4. There should be Volts measured in both cases when using a 12V battery; 8 11 Volts when using a 9V battery. Note: For clarity, the winding wires normally connected to the short terminal strip are shown disconnected; however, it is not necessary to disconnect them during this procedure. 88

89 LTC Repair Electrical Troubleshooting If you measure the correct voltage, the generator is functioning. Shut down the machine and disconnect the jumpers, first at the capacitor wires, then at the battery. If you do not measure the correct voltage, there is a problem. Shut down the machine and disconnect the jumpers, first at the capacitor wires then at the battery. Continue troubleshooting. See section Checking Rotor Windings. a F m V A V- COM + 12V F m V A + V- COM 9V wc_gr

90 Electrical Troubleshooting Procedures 6.14 Removing the Generator LTC Repair See Graphic: wc_gr This procedure requires a floor jack and a hoist capable of lifting 45 kg. (100 lbs.) Turn off the lights, shut down the engine, and disconnect the battery Remove the screws securing the cradle (a) and remove the cradle Remove the ground wires (b) between the doors and the top Remove the doors (c) Remove the screws that secure the top and remove the top Disconnect the generator wiring from the short terminal strip (d) and from the excitation capacitor (e). Also disconnect the ground wire (f) from the control box Remove the nut (g) that secures the wiring support harness. Remove the wiring support harness from the control box and slide the generator wires out of the control box Disconnect the ground wire from the frame Remove the screws that secure the fuel tank and remove the fuel tank Support the engine, on the generator end, from underneath with a floor jack Remove the nut (h) (from underneath) that secures the generator housing to the support bracket Remove the screws (i) that secure the generator mounting flange to the engine bell housing Using two pry bars or flat head screwdrivers, pry the generator mounting flange from the engine bell housing. The rotor will be separated from the stator in the process. Slide the stator (j) off the rotor Support the rotor with an appropriate sling and crane Remove the screws (k) that secure the flex plates of the rotor to the engine flywheel Lift the rotor up and out of the machine. 90

91 LTC Repair Electrical Troubleshooting c a b f g d e i h i j k 91 wc gr003777

92 Electrical Troubleshooting Procedures 6.15 Installing the Generator LTC Repair See Graphic: wc_gr This procedure requires a floor jack and a hoist capable of lifting 45 kg. (100 lbs.). This procedure also requires an M10 screw, an M10 nut, and a heavy-duty washer to fit the M10 screw Support the engine, on the generator end, from underneath with the floor jack With an appropriate crane or hoist, position the rotor (h) into the machine Install the screws (j) that secure the flex plates of the rotor to the engine flywheel. Torque the screws to 21 Nm (15 ft.lbs.) Assemble the M10 nut to the M10 screw followed by the washer. Insert the M10 screw assembly (x) through the stator and into the shaft of the rotor. Align the stator x with the bearing of the rotor. M10 Using the M10 nut as a pusher, push the stator onto the rotor until the bearing reaches its home position. wc_gr Install the screws (i) that secure the mounting flange of the generator to the bell housing of the engine. Torque the screws to 35 Nm (26 ft.lbs.) Install the nuts that secure the shock mounts to the underside of the frame Connect the ground wire to the frame Slide the wires into the control box and install the wiring support harness to the control box with the nut (g) Connect the generator wiring to the short terminal strip (d) and to the excitation capacitor (e). Also connect the grounding wiring (f) to the control box Install the top Install the doors (c) Install the ground wires (b) between the doors and the top Install the cradle (a). 92

93 LTC Repair Electrical Troubleshooting k j i h i f g d e c a b wc_gr

94 Electrical Troubleshooting Procedures 6.16 Checking the Rotor Diodes LTC Repair See Graphic: wc_gr There are two diodes on the rotor assembly. The engine/generator assembly must be removed and the stator must be separated from the rotor to check the function of the diodes. When checking, be sure to check both diodes Unsolder the two wires from the terminal end of each diode Using the diode setting on the multimeter, measure the voltage across the diode terminal and the base of the diode. Reverse the leads of the meter and measure the voltage again. One of the readings should be between V. With the meter leads reversed, the other reading should be OL or a very large reading (for example, 2.0 MV) If your readings do not match those listed above, replace both diodes. Unscrew the diode to remove it. 94

95 LTC Repair Electrical Troubleshooting F V wc_gr A V- COM 95

96 Electrical Troubleshooting Procedures 6.17 Checking the Rotor Windings LTC Repair See Graphic: wc_gr After checking the two rotor diodes, check the rotor windings. The engine/generator assembly must be removed and the stator must be separated from the rotor in order to check the rotor windings Unsolder the two rotor winding wires from the terminal end of each diode Using the Ohms setting on the multimeter, measure the resistance across the wires and the base of the corresponding diode. Each wire reading should be /-0.0 Ohms or greater. If your readings are not /-0.0 Ohms or greater, replace the generator Check the resistance of all four rotor windings in the manner described above Also check the resistance across the wires and the rotor shaft. If the readings are not OL, or greater than 2 megohms (2M Ohms), replace the generator. Confirm with Wacker Corporation Service before replacing Check all four wires in this manner. For a more thorough insulation test, use a megger meter capable of 500 Volts or have a motor repair shop test it. If the readings are 2 megohms (2M Ohms) or greater, the rotor is good. If the readings are less than 2 megohms, replace the generator end. Consult Wacker Corporation Service to confirm. F V F V wc_gr M 2M 200k 20k 2k 200 A 20M 2M 200k 20k 2k 200 A V- COM V- COM 96

97 LTC Repair 6.18 Lights do not Illuminate Flowchart 1C Electrical Troubleshooting Check voltage at the main circuit breaker. See Checking Voltage at the Main Circuit Breaker. Is 240V±10% measured? Yes Check voltage at the long terminal strip. See Checking Voltage to Long Terminal Strip. No Repair wiring between short terminal strip and main circuit breaker. Repair wiring between main circuit breaker and long terminal strip. No Is 230±10%V measured? Yes Check voltage at individual circuit breakers. See Checking Individual Circuit Breakers. Check incoming voltage to ballast capacitors. See Checking Incoming Voltage to Ballast Capacitor(s). Yes Is 230V±10% measured? Is 400±10%V measured? Yes No Repair wiring between individual circuit breakers and ballast capacitors and/or replace transformer (s). No Repair wiring between long terminal strip and individual circuit breakers and/or replace circuit breaker(s). Check outgoing voltage from ballast capacitors. See Checking Outgoing Voltage from Ballast Capacitors. Is 400V±10% measured? No Yes Conduct continuity tests on the wiring between the ballast capacitors and the mast junction box. Repair or replace the wiring as needed. Replace ballast capacitor(s). wc_gr

98 Electrical Troubleshooting Procedures 6.19 Checking Voltage at the Main Circuit Breaker LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Do not perform this test if you or the machine are wet. Complete this test with the machine running Remove the control panel front cover Using the AC voltage setting on the multimeter, measure the voltage between the two incoming terminals (a) of the main circuit breaker. There should be 230V±10%. If 230V±10% was not measured, shut down the machine and check the continuity of the wiring back to the short terminal strip. Repair the wiring as necessary. If 230V±10% was measured, continue Place the main circuit breaker in the ON position and measure the voltage between the two outgoing terminals of the main circuit breaker. If 230V±10% was not measured, shutdown the machine and replace the main circuit breaker. If 230V±10% was measured, the wiring and main circuit breaker are functioning properly. 98

99 LTC Repair Electrical Troubleshooting a F m V A V- COM F m V A V- COM wc_gr

100 Electrical Troubleshooting Procedures 6.20 Checking Voltage to Long Terminal Strip LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Do not perform this test if you or the machine are wet. Complete this test with the machine running Remove the control panel front cover Place the main circuit breaker in the ON position Using the AC voltage setting on the multimeter, measure the voltage between the R/G wire (a) and any of the neutral wires connected to the long terminal strip. There should be 120V±10%. If 120V±10% was not measured, shut down the machine and check the continuity of the wiring back to the main circuit breaker. Repair the wiring as necessary. If 120V±10% was measured, continue Using the AC voltage setting on the multimeter, measure the voltage between the B/G wire (b) and any of the neutral wires connected to the long terminal strip. There should be 120V±10%. If 120V±10% was not measured, shut down the machine and check the continuity of the wiring back to the main circuit breaker. Repair the wiring as necessary. If 120V±10% was measured, the long terminal strip is receiving the correct voltage. 100

101 LTC Repair Electrical Troubleshooting a F m V A V- COM wc_gr

102 Electrical Troubleshooting Procedures 6.21 Checking Individual Circuit Breakers LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Do not perform this test if you or the machine are wet. Complete this test with the machine running. Test power to all circuit breakers or just the circuit breaker in question Unplug the light(s) at the upper mast quick-disconnect plugs or disconnect the lights at the junction box Remove control panel front cover Place the main circuit breaker in the ON position Using the AC voltage setting on the multimeter, test for 230V±10% incoming voltage by measuring across the input wires (a) (R/B, R, Br, or Br/Y (Br/W on some models)) at the back of the circuit breaker(s) and the wires at the terminal strip (b). If 230V±10% is not measured, it indicates a problem with voltage reaching the circuit breaker. Check the continuity of the wiring between the terminal strip and the circuit breaker. Repair or replace the wiring as needed. If 230V±10% is measured at the circuit breaker, continue Place the circuit breaker being tested in the ON position and measure the voltage between the outgoing side of the circuit breaker (c) and the wires at the terminal strip (b). If 230V±10% is not measured, it indicates a problem with the circuit breaker. Check the continuity of the circuit breaker. Replace the circuit breaker if needed. If 230V±10% is measured, voltage is being supplied through the circuit breaker. Continue troubleshooting by checking the function of control panel capacitors. See section Checking Incoming Voltage to Control Panel Capacitor(s). 102

103 LTC Repair Electrical Troubleshooting b a F m V c A wc_gr V- COM 103

104 Electrical Troubleshooting Procedures 6.22 Confirming a Malfunctioning Circuit Breaker LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Complete this test with the engine shut down Remove the circuit breaker(s) from the control panel Place the circuit breaker ON-OFF switch in the ON position Using the Ohms scale on the multimeter, test the circuit breaker for continuity. If you measure no continuity ( OL or OPEN ), replace the breaker. If the breaker has continuity, re-install it Place the ON-OFF switch in the OFF position. 104

105 LTC Repair Electrical Troubleshooting wc_gr

106 Electrical Troubleshooting Procedures 6.23 Checking Incoming Voltage to Ballast Capacitor(s) LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Start this procedure with the machine shut down Remove the control panel front cover Disconnect the wiring to the lights by disconnecting the outgoing wires (a, b, c, & d) from the ballast capacitors Start the machine Place the main circuit breaker and the individual circuit breaker(s) in the ON position Using the AC voltage setting on the multimeter, measure the incoming voltage to the ballast capacitor(s) by measuring across the input wire (e) and the wires (f) of the terminal strip. There should be 400V±10% measured. If 400V±10% is not measured, it indicates: faulty wiring to the ballast transformers, faulty wiring to the ballast capacitors, or a failed ballast transformer. See section Checking Wiring to/from Ballast Transformers. If 400V±10% is measured, the ballast transformer(s) is functioning. Shutdown the machine and continue troubleshooting by checking the ballast capacitors. See section Checking Outgoing Voltage from Ballast Capacitor(s). 106

107 LTC Repair Electrical Troubleshooting f e e d c b a F m V A V- COM wc_gr

108 Electrical Troubleshooting Procedures 6.24 Checking Outgoing Voltage from Ballast Capacitor(s) See Graphic: wc_gr WARNING LTC Repair Electric shock hazard. Only qualified personnel should conduct this test. Start this procedure with the machine shut down Remove the control panel front cover Disconnect the wiring to the lights by disconnecting the outgoing wires (a, b, c, & d) from the ballast capacitors Start the machine Place the main circuit breaker and the individual circuit breaker(s) in the ON position Using the AC voltage setting on the multimeter, measure the outgoing voltage from the ballast capacitor(s) by measuring across the output wire (e) and the wires (f) of the terminal strip. There should be 400V±10% measured. If 400V±10% is not measured, it indicates a faulty ballast capacitor. Double-check the ballast capacitor. See section Confirming a Faulty Ballast Capacitor. If 400V±10% is measured, the ballast capacitor is functioning. Shutdown the machine and continue troubleshooting by checking the continuity of the wiring from the ballast capacitor through the junction box and on to the light fixtures. 108

109 LTC Repair Electrical Troubleshooting e f d c b a F m V A V- COM wc_gr

110 Electrical Troubleshooting Procedures 6.25 Confirming a Faulty Ballast Capacitor LTC Repair See Graphic: wc_gr Carry out this procedure with the engine shut down Remove the input and output wires from the capacitor Discharge the capacitor by placing the blade of an insulated screwdriver across the two spades of the capacitor Using a multimeter set to the Farad (F) or capacitance (C) scale (200 µf), measure the capacitor s capacitance. Each capacitor should measure 30±1 µf. If the reading is not within this range, replace the capacitor. 110

111 LTC Repair Electrical Troubleshooting F 20n 200n 2 µ 20 µ 200 µ 2000 µ 20m 2n 200p V A V- COM wc_gr

112 Electrical Troubleshooting Procedures 6.26 Checking Wiring to/from Ballast Transformers LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. To check the wiring to and from the ballast transformer(s): Turn off the engine Remove the control panel front cover Remove the screws (a) that secure the control panel/cover of the ballast box (b). Position the control panel/cover of the ballast box so you can access the wiring to the ballast transformers Check the B/Y (black-yellow) wire(s) (c) that run from the circuit breaker(s) to the ballast transformer(s). Repair the wiring as needed Check the R (red) wire(s) (d) that run from the ballast transformer(s) to the ballast capacitor(s). Repair the wiring as needed Check the Y (yellow) wire(s) (e) labelled COMMON that run from the ballast transformer(s) to the neutral of the long terminal strip. Repair the wiring as needed If all wiring is OK and 400V±10% is not reaching the ballast capacitor, the ballast transformer has failed; replace it. 112

113 LTC Repair Electrical Troubleshooting a b d e c c e d wc_gr

114 Electrical Troubleshooting Procedures 6.27 Replacing Ballast Transformer(s) LTC Repair See Graphic: wc _gr Removal: Shut down the engine and disconnect the battery Open the control panel and snip the wire ties (a) holding the ballast transformer wires to the long terminal strip Remove the six screws securing the control panel/ballast box cover. Pull the control panel/ballast box cover (b) off the ballast box just enough to allow access to the ballast transformers Remove the wiring (c, d, e) from the ballast box for each ballast transformer being replaced Remove the hardware (f) securing the ballast transformer (g) and remove the ballast transformer from the ballast box. Installation: Secure the replacement ballast transformer (g) in the ballast box with the hardware (f) Run the wires (c, d, e) up through the control panel and secure them to the proper locations Secure the control panel/ballast box cover (b) to the ballast box with the six screws Gather and organize the wires with new wire ties (a) Secure the control panel cover to the control panel with six screws. 114

115 LTC Repair Electrical Troubleshooting b a e g c d f wc_gr

116 Electrical Troubleshooting Procedures 6.28 Checking Voltage at the Receptacle LTC Repair See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Complete this test with the machine running and both the main circuit breaker and the receptacle circuit breaker in the ON position Using the AC voltage setting on the multimeter, test the receptacle for 115V±10% on machines; 230V±10% on and machines If the correct voltage is not measured at the front of the receptacle, test for voltage at the back of the receptacle. If the correct voltage is measured at the back of the receptacle but not at the front, the receptacle has failed; replace it. 116

117 LTC Repair Electrical Troubleshooting F V F V m 200m A A V- COM V- COM wc_gr

118 Electrical Troubleshooting Procedures LTC Repair 6.29 Checking Receptacle s Circuit Breaker See Graphic: wc_gr WARNING Electric shock hazard. Only qualified personnel should conduct this test. Complete this test with the machine running Using the AC voltage setting on the multimeter, measure the incoming voltage to the receptacle s circuit breaker by measuring between the brown-yellow wire (a) and the wires (b) of the terminal strip. There should be 115V or 230V±10% depending on model. If the correct voltage is not measured, the receptacle s circuit breaker is not receiving voltage. Check the condition of the wiring between the receptacle s circuit breaker and the terminal strip. Repair/replace the wiring as needed. If the correct voltage is measured, continue Make sure the receptacle s circuit breaker is in the ON position Using the AC voltage setting on the multimeter, measure the outgoing voltage from the receptacle s circuit breaker by measuring between the outgoing wire (c) and the wires (b) of the terminal strip. There should be 115V or 230V±10% depending on model. If the correct voltage is not measured, the receptacle s circuit breaker is not functioning. Confirm that receptacle s circuit breaker is malfunctioning by checking its continuity. Replace the circuit breaker if needed. If the correct voltage is measured, continue troubleshooting by checking the earth-leakage circuit breaker. b a F V F V m 200m A A c V- COM V- COM wc_gr

119 LTC Repair 6.30 Checking the Emergency Stop Switch Electrical Troubleshooting See Graphic: wc_gr Complete this test with the engine off Remove the cover of the small control panel where the emergency stop switch is mounted Place the emergency stop switch in the deactivated (out) position In the deactivated position, contacts NC1 and NC2 should have continuity. Both pairs of NO3 and NO4 should have no continuity (open) Place the emergency stop switch in the activated position (in). Contacts NC1 and NC2 should be open. Both pairs of NO3 and NO4 should have continuity If the emergency stop switch does not perform as above, replace it. wc_gr

120 Electrical Troubleshooting Procedures 6.31 Troubleshooting the Power Winch LTC Repair See Graphic: wc_gr Lower the tower Lower the mast assembly into the cradle Turn off the engine Be sure the machine s battery is fully charged (approximately 12V) Remove the four screws (a) which secure the cover of the winch and remove the cover. Pinching hazard. Use extreme care when operating the winch with its cover removed. CAUTION Disconnect the red and black wires at the motor (b) Place the appropriate winch switch (c) in the up or down position, and check for battery voltage (approximately 12) between the red and black wires. If 12V is measured, the power winch is receiving the correct voltage. Thus, the power winch should operate. If power winch does not operate, replace it. If 12V is not measured, continue Remove the control panel (d) from the control box Check for battery voltage (approximately 12V) between terminals B1 and B2 of the winch switch (e). If 12V is measured, the winch switch is receiving the correct voltage. Thus, the power winch switch should operate. Check for battery voltage between terminals A1 and A2 for both the up and the down positions of the winch switch. If the winch switch does not operate, replace it. If 12V is not measured, continue Locate the circuit breaker (f). Remove the tape and check for battery voltage between the output side (g) of the circuit breaker and ground. If 12V is measured at the output side of the circuit breaker but not at the winch switch, the wiring between the circuit breaker and the winch switch has failed; repair or replace the wiring. If 12V is not measured, continue Check for battery voltage between the input side of the circuit breaker and ground. If 12V is measured between the input side and ground but not the output side and ground, the circuit breaker has failed; replace it. 120

121 2 200m 2 200m LTC Repair Electrical Troubleshooting If 12V is not measured, the wiring from the starter solenoid or the wiring from the battery to the starter solenoid has failed. Check the wiring and repair or replace it as necessary. F V A V- COM a b d c F V A e V- COM f g h wc_gr

122 Electrical Troubleshooting Procedures Notes LTC Repair 122

123 LTC Repair Disassembly/Assembly Procedures 7. Disassembly/Assembly Procedures 7.1 Tools 7.2 Ordering Parts Because all possible problems encountered while repairing the machine cannot be anticipated, it is up to the mechanic to use common sense and good judgement in tool selection. The use of any special tools is recommended only for those operations where the use of conventional tools proves inadequate. Before substituting another tool or procedure, you should be satisfied that neither personal injury nor damage to the component will result. The repair procedures contained in this manual do not include part numbers. For parts replacement information, refer to the Parts Book originally supplied with the machine. If the original Parts Book has been lost, a replacement may be ordered from Wacker Corporation. When ordering a replacement Parts Book, please list the model number, item number, revision level, and serial number of the machine. Parts Books are also available on the Wacker Corporation Web site. See Enter the site as a visitor. 7.3 Reference Numbers ( ) 7.4 Weight Block Repair procedures contain reference numbers enclosed in parentheses ( ). These numbers refer to the item numbers shown on the assembly drawings and other detailed drawings. They are included to aid the mechanic in identifying parts and assembling components. See Graphic: wc_gr The weight block symbol gives an approximate weight measurement to aid the mechanic when lifting/hoisting larger components. 250 kg (550 lbs.) wc_gr

124 Disassembly/Assembly Procedures 7.5 Light Assembly LTC Repair See Graphic: wc_gr Removal: Disconnect the light at the junction box Remove the T-handle (b) and the cone washer (c). Also remove the nut (d) and the washer (e) securing the opposite end Pull the light assembly (f) from the bracket (g) Remove the screws (h) securing the flange rings (i) and remove the flange rings Remove the lens (j) with the gasket (k) attached. Remove the gasket from the glass if replacing the gasket or lens Remove the hardware securing the bulb stabilizer (l) on one side. Once removed, swing the bulb stabilizer to the side and unscrew the bulb (m) Remove the four screws (n) and the flange (t) securing the ceramic fixture assembly (o) to the reflector and remove the ceramic fixture assembly including the gasket (s) Remove the two screws securing the cover to the connector box and cut the black (p) and white wires (q) near the crimp nuts Remove the two screws (r) securing the ceramic fixture to the housing and remove the ceramic fixture. Installation: Slide the wiring of the replacement ceramic fixture through the housing and into the connector box. Secure the ceramic fixture to the housing with the two screws (r) Connect the black wire (p) from the new ceramic fixture to the black wire in the connector box. Connect the white wire (q) from the new light fixture to the white wire of the connector box. Secure the wires with new crimp nuts Replace the cover of the connector box and secure it with the two screws Secure the ceramic fixture assembly (o), the gasket (s), and the flange (t), to the reflector using the four screws (n) Insert the bulb and secure it with the bulb stabilizer (l) Install the gasket (k) around the lens (j) and secure the lens to the reflector with the flange ring (i) and the screws (h) Mount the light assembly (f) to the bracket (g) and mount the assembly to the upper mast. Connect the wiring at the junction box. 124

125 LTC Repair Disassembly/Assembly Procedures b c k e d g j h i f l n o m t r p s q wc_gr

126 Disassembly/Assembly Procedures 7.6 Tower Assembly Exploded View LTC Repair 250 Kg (550 lbs.) a b c d p e f i n g h k l wc_gr j m 126

127 LTC Repair 7.7 Tower Assembly List of Parts Disassembly/Assembly Procedures Ref. Description Ref. Description a Main mast (4-inch tube) i Mid mast (3-inch tube) b Winch j Cross member c Main mast cable k Upper mast (2-inch tube) d Main mast pulley l Junction box e Main mast guide m Cross member wiring cable clamps f Upper mast cable n Mid-mast wiring cable clamps g Mid-mast guide o Retaining bolt h Mid-mast pulley p Eyebolt or U-bolt 7.8 Upper Mast See Graphic: wc_gr003793, wc_gr003794, and wc_gr Disassembly: Turn the lights off, turn the unit off, and lower the mast assembly into the cradle before performing this procedure. Place the Light Tower in a position with enough room so that the masts may be extended fully while in the down position. The mast cable system consists of two cables: one (c) connected to the winch mounted on the main mast that raises the mid mast, and a second (f) that is connected to both the upper mast and the lower mast. This second cable raises the upper mast as the mid mast is being raised Disconnect the wiring for each light fixture at the junction box. Then, remove each light fixture. Store the light fixtures in a safe place When replacing the upper-mast cross member (j) only, disconnect the wiring cable clamps (m) and the junction box (l), then simply replace the cross member. When replacing cables or portions of the mast, the junction box may remain mounted to the cross member. Disconnect the wiring cable clamp (n) from the mid mast, then disconnect the cross member with the box attached and place it near the trailer Using the tongue-mounted winch, raise the tower so that the masts are approximately two inches (5 cm) above the cradle locking pin (aa). 127

128 Disassembly/Assembly Procedures LTC Repair Remove the screws (bb) securing the five guides (g) to the mid mast Pull the upper mast partially (2 6 feet (1 2 m)) out of the mid mast Make note of the upper mast cable (cc) as it passes around the midmast pulley (dd) then between the mid-mast pulley and the guide hardware (ee). Remove the mid-mast pulley. Remove the guide hardware only if it requires replacement Remove the upper mast (k) completely from the mid mast Remove the hardware securing the cable U-bolt (p) to the main mast Remove the hardware securing the cable to the upper mast. Once free from the upper mast, run the cable back through the opening near the guide screw in the mid mast and remove cable completely from the machine. WARNING Reassembly: Replacement cables must be of the exact length of the original equipment. Using shorter cables may cause severe personal injury Mount the mid-mast pulley (dd). Run the upper-mast cable (cc) around the mid-mast pulley (dd) and between the pulley and the guide hardware (ee). Attach the cable to the upper mast (k) Slide the upper mast into the mid mast (i) Attach the five guides (g) using new self-tapping screws. Position the guides so that the self-tapping screws thread themselves into the smaller side of the tapered hole in the guide. Note: Limit reuse of the guides to one time Secure the cable U-bolt (p) to the main mast Mount the light fixtures and reconnect the wiring. 128

129 LTC Repair Disassembly/Assembly Procedures aa bb dd ee cc wc_gr When installing the junction box, be sure to include the gasket (a) and use a silicon-based sealant on all hardware and plugs (b). b a wc_gr

130 Disassembly/Assembly Procedures 7.9 Mid Mast LTC Repair See Graphic: wc_gr and wc_gr Disassembly: Turn the lights off, turn the unit off, and lower the mast assembly into the cradle before this performing procedure. Place the Light Tower in a position with enough room so that the masts may be extended fully while in the down position. The mast cable system consists of two cables: one (c) connected to the winch mounted on the main mast that raises the mid mast; and a second (f) that is connected to both the upper mast and the main mast. This second cable raises the upper mast as the mid mast is being raised Disconnect the wiring at each light fixture s quick-disconnect or at the junction box. Then, remove each light fixture. Store the light fixtures in a safe place Using the tongue-mounted winch, raise the tower just so that the masts are free from the cradle locking pin Remove the upper-mast cross member (j) with the junction box attached Remove the upper-mast cable eyebolt (p) Using the mast-mounted winch, back off the tension of the cable until the cable may be unwound from the mast-mounted winch. Unwind and remove the cable from the mast-mounted winch On machines using rivets*, drill out the rivets (ww) securing the five guides to the main mast. On machines using screws, remove the screws to remove the five guides. *Note: Replacement screws will be required for reassembly Remove the stop screw (xx) Remove the main-mast pulley (cc) Using the aid of an assistant or appropriate hoist, pull both the upper and mid-mast sections from the main mast Remove the hardware securing the cable to the mid mast and remove the cable from the mid mast. If the mid mast requires replacement, continue Remove the five guides (g) from the inside of the end of the mid mast (i) Remove the mid-mast pulley (h) Pull the upper mast (k) free of the mid mast. 130

131 LTC Repair Disassembly/Assembly Procedures WARNING Reassembly: Replacement cables must be of the exact length of the original equipment. Using shorter cables may cause severe personal injury Attach the cable to the mid mast Hold the cable snug to upper side of the mid mast and insert it into the main mast (a) 3/4 of the way, approximately 7 feet (2.3 m) Attach the five guides (g) using the new self-tapping screws. Position the guides so that the self-tapping screws thread themselves into the smaller side of the tapered hole in the guide. Note: Limit reuse of the guides to one time. The guides must be installed because they serve as safety stops. Without them properly installed, the mid-mast section could be pulled out of the main-mast section, possibly causing severe bodily harm Route cable (yy) around the main-mast pulley (zz) and install the mainmast pulley Slide the mid mast completely into the main mast Attach the cable to the winch See section Upper Mast for installing the upper mast. WARNING ww xx yy zz cc wc_gr

132 Disassembly/Assembly Procedures 7.10 Main Mast LTC Repair See Graphic: wc_gr03532 Disassembly: Turn the lights off, turn the unit off, and lower the mast assembly into the cradle before performing this procedure. Place the Light Tower in a position with enough room so that the masts may be extended fully while in the down position. The mast cable system consists of two cables: one connected to the winch mounted on the main mast that raises the mid mast; and a second that is connected to both the upper mast and the main mast. This second cable raises the upper mast as the mid mast is being raised Remove the upper mast and the mid mast from the main mast. See section Mid Mast Disconnect the wiring from the control panel by: Snipping the wire ties (a). Disconnecting the wires from the capacitors (b). Disconnecting the wires from terminal strip (c) Loosen the clamps (d & e) securing the tower supply cable. One clamp is located on the control box and the other is on the front enclosure panel Thread the tower supply cable through the eyes (g) on the side of the main mast Remove the cable clip (h) attached to the end of the main mast Tighten the adjusting knob (i) so that the main mast will not spin when loosening the nut (j) securing the main mast to the main cradle. Remove the nut securing the main mast to the main cradle Loosen the adjusting knob Using an appropriate crane or hoist, lift the main mast up and out of the main cradle and free from the machine. 132

133 LTC Repair Disassembly/Assembly Procedures c d a b ce g i j h wc_gr

134 Disassembly/Assembly Procedures LTC Repair See Graphic: wc_gr Reassembly: Grease the adjusting point circle (a) of the main cradle and the bottom pivot point (b) of the main mast Using an appropriate crane or hoist, lift the main mast onto the top of the generator enclosure. Slide the bottom of the main mast into the main cradle Secure the main mast to the main cradle with the washer and nut (c) Position the cable clip (d), on the tower supply cable, just below the lower curled portion of the cable. Then, secure the cable clip to the end of the main mast Thread the tower supply cable through the eyes (e) on the main mast Thread the tower supply cable through the clamp (f) at the front of the machine; leave a loop (g) of cable large enough so there is enough slack in the cable to raise the mast Feed the tower supply cable into the control box and connect the wires to the appropriate locations (h & i). Refer to the wiring diagram. Tighten the cable clamp (j), organize the wires with new wire ties (k), and re-install the control panel cover. 134

135 LTC Repair Disassembly/Assembly Procedures c a b d f g h k e i j wc_gr

136 Disassembly/Assembly Procedures 7.11 Replacing Cable and Winch on Power Winch Models See Graphic: wc_gr Removal: LTC Repair Lower the tower Lower the mast assembly into the cradle Turn off the engine Remove the four screws (a) which secure the cover of the winch and remove the cover. Pinching hazard. Use extreme care when operating the winch with its cover removed. CAUTION Using the appropriate switch (b) or the auxiliary handle (c), run the winch so that all remaining cable is unwound from the spool. Do not run the winch for periods of longer than four minutes. Allow the winch to cool if necessary Position the spool so that the retaining clamp (d) is accessible Loosen the screw which secures the clamp and the cable, and remove the cable from the spool To remove the winch, disconnect the motor wires (f). Then, remove the screws (g) which secure the winch to the machine and remove the winch. Installation: To install the winch, position the winch on the machine and secure it with the screws (g). Then, connect the motor wires (f) Thread the cable through the hole in the spool (e) so that when the winch reels in the cable, the cable winds around the top of the spool Secure the cable to the spool using the cable clamp (d) and screw. Be sure to secure the cable in both sides of the clamp Use the appropriate switch (b) or auxiliary handle (c) to wind up the cable Reinstall the cover using the four screws (a). 136

137 LTC Repair Disassembly/Assembly Procedures a b c d e f g wc_gr

138 Disassembly/Assembly Procedures 7.12 Replacing Fuel Tank LTC Repair See Graphic: wc_gr Removal: Turn off the lights, shut down the engine, and disconnect the battery Position the main mast in the vertical position. Note: It is not necessary to raise the tower Remove the screws securing the mast cradle (a) and remove the mast cradle Remove the ground wires (b) between the doors and the top Remove the doors (c) Remove the screws (f) that secure the top and remove the top Drain any remaining fuel in the fuel tank Snip the wire ties (g) Remove the bolts (h) securing the hold-down straps (i) Disconnect the fuel intake (j) and return lines (k) With the aid of a partner or appropriate hoist, lift the fuel tank from the machine. Installation: Position the fuel tank into the machine Slide the new wire ties (g) underneath the hold-down straps (i) and secure the fuel tank to the machine with the hold-down straps using the bolts (h) Reconnect the fuel intake (j) and return lines (k) Reinstall the top with the screws (f) Reinstall the doors Reinstall the ground wires (b) between the doors and the top Reinstall the cradle (a). 138

139 LTC Repair Disassembly/Assembly Procedures c a a b j i f h g k wc_gr

140 Disassembly/Assembly Procedures 7.13 Replacing Hour Meter LTC Repair See Graphic: wc_gr Disassembly: Shut down the engine and disconnect the battery Remove the six screws securing the control panel cover to the control panel Make note of the wire connections on the hour meter and remove the wires (a) from the hour meter Pull out the tabs (b) on the locking bracket (c) and remove the hour meter from the panel. Reassembly: Insert the replacement hour meter into the control panel and secure it with the locking bracket (c) Attach the wires (a) to the appropriate terminals of the hour meter Secure the control panel cover to the control panel with the six screws. 140

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