Hydraulic Dehorner EQUIPMENT SELECTION... Ordering No. TABLE OF CONTENTS... Page 50G Dehorner Electric Triggers Offset Blades... 4025011 Cup Blades... 4025047 Air Triggers Offset Blades... 4025025 Cup Blades... 4025041 Hydraulic Power Unit Electric Triggers... 4027044 Air Triggers... 4027088 Balancer... 4042039 Safety Messages to Employer and Safety Director... 2 Safety Messages to Operators, Maintenance and Cleanup Personnel 3 Parts Diagram and List... 4 Installation and Wiring Diagram... 11 Specifications... 12 Installation Instructions... 12 Operation Instructions... 13 Maintenance Instructions... 13
safety messages to employer and safety director page 2 of 16 Keep hands clear. SAFETY MESSAGES TO EMPLOYER AND SAFETY DIRECTOR AVOID INJURY 1. Remove and repair any tool that malfunctions. All personnel must be instructed to remove any malfunctioning equipment. 2. Ensure that all employees who use this tool are trained in the proper use of this tool and are aware of the dangers that may arise if they do not follow procedures outlined in this brochure. 3. Enclosed are four (4) copies of NOTICE TO OPERATORS, MAINTENANCE AND CLEANUP PER- SONNEL. Post one copy on the employees bulletin board; give one copy to the operator(s); give one copy to the maintenance foreman; and give one copy to the sub -contract cleanup / internal cleanup foreman. Additional copies will be provided upon request. 4. The tool is designed and intended to be powerful. This fact should be obvious to your employees, but you must emphasize it to them. 5. Never make modifications or alterations to the tool. Replace any missing or illegible labels. 6. Ensure that proper procedures are established (in accordance with OSHA s lockout/tagout procedures 1910.147) to prevent accidental startup or release of stored energy. 7. Follow our installation and maintenance instructions for proper installation and care of the tool. 8. Avoid injury. Do not permit the tool to be misused. 9. If you resell or distribute a Jarvis product, you must provide the purchaser with the appropriate safety sheets and tool brochure. Additional copies of safety sheets and tool brochures will be provided upon request.
safety messages to operators, maintenance and cleanup personnel page 3 of 16 Keep hands clear. SAFETY MESSAGES TO OPERATORS, MAINTENANCE AND CLEANUP PERSONNEL REMOVE ANY MALFUNCTIONING TOOL FROM SERVICE REPORT ANY PROBLEMS TO YOUR SUPERVISOR 1. Disconnect all hydraulic and air hoses and shut the power off in accordance with OSHA s lockout/tagout procedures (29 CFR 1910.147) before sharpening blades. 2. Disconnect all hydraulic and air hoses and shut the power off in accordance with OSHA s lockout/tagout procedures (29 CFR 1910.147) before performing any repair or maintenance. 3. Disconnect all hydraulic and air hoses and shut the power off - or have all hydraulic and air hoses disconnected and the power shut off - in accordance with OSHA s lockout/tagout procedures (29 CFR 1910.147) before performing any cleanup. 4. Disconnect all hydraulic and air hoses and shut the power off when the tool is not being used. 5. Clean up any spilled or leaked hydraulic fluid. 6. Never put fingers, hands or other parts of the body on the cutting edge, in the cutting path or in the path of the moving blades. 7. Never operate the tool with its guards removed. Report or replace any damaged guards. 8. Test the tool prior to useor daily. Depresseach trigger separately andthe bladeshould not close. Depress one trigger, then pause one second and depress the other trigger and the blade should not close. Repeat this procedure reversing the triggers. Depress both triggers simultaneously and the blade should close. With the blade closed, release one trigger and the blade should open. Continue holding the depressed trigger and then depress the other trigger. The blade should not close. Repeat this procedure holding the other trigger. If the tool malfunctions, remove it from service and report or repair it immediately. 9. Never depress the triggers unless you want to use or test the tool. 10. Never make modifications or alterations to the tool. Report or replace any missing or illegible labels.
parts diagram and list page 4 of 16 Figure A J F F J J F J Torque to 200 lbf--ft F F Torque to 150 lbf--ft Not used in current tools 1 1028040 Pin and Shackle Link Assy 1 2 1042123 Hanger 1 3 1042115 Hanger Bracket 1 4 1055947 Hex Head Screw 2 5 1024076 Right Blade Guard 1 6 1055358 Hex Head Screw 2 7 1032152 Rail Mounting Plate 1 8 1007320H Acorn Nut 4 9 1050630 Elbow 2 10 3059008 Hose Assembly 2 11 1011108 Quick Connect Socket 1 12 1011107 Quick Connect Plug 1 13 page 5 Hydraulic Cylinder Assembly 1 14 1055449 Hex Head Screw 4 15 1042157 Right Handle Bracket 1 16 page 5 Handle Assembly 2 17 1055304 Hex Head Screw 2 18 1055693 F Hex Head Screw 2 19 1061197 Rail with items 27 and 36 2 20 1024069 Left Blade Guard 1 21 1055948 Socket Head Cap Screw 2 22 1071290 Block, Self Aligning 1 1061307 Block 23 1069011 Shim 1 24 1023130 Offset Blade, Moving (Flat) 1 25 1061750 Rail with items 27 and 36 2 26 1023131 Offset Blade, Fixed (Sharp) 1 27 1055975 Pan Head Slotted Screw 16 28 1017046 Name and Serial No. Plate 1 29 1055451 F Hex Head Screw 2 30 1029336 Spacer 2 31 1042156 Left Handle Bracket 1 32 1055334 Hex Head Screw 2 33 1055330 Hex Head Screw 2 34 1004049 Split Lock Washer 4 35 1032153 Rail Mounting Plate 1 36 1017082 Danger Label 3 37 1007040 Castle Nut 1 38 1010062 Cotter Pin 1 39 1063205 Conduit 1 40 page 5 Electrical Assembly 1 41 1063206 Conduit 1 42 1023259 Cup Blade, Fixed or Moving 2 3023134 Cup Blade Set ( 2 item 42) J
parts diagram and list page 5 of 16 Figures B Handle Assembly Electrical Assembly 1 1063209 Male Twist Lock Plug 1 2 1001152 Electrical Wire 1 3 1011352 Strain Relief Connector 1 4 1063143 Electrical Box Cover 1 5 1061209 Gasket 1 6 1050302 Connector 2 7 1055283 Hex Head Screw 2 8 1055325 Hex Head Screw 4 9 1063142 Electrical Box 1 10 1513400 Button Head Screw 1 11 1055334 Hex Head Screw 4 12 1014085 Spring 2 13 1014096 Compression Spring 4 14 1018103 Trigger Lever 2 15 1039040 Plunger 2 16 1013250 Retaining Ring 2 17 1005047 Switch 2 18 1019105 Handle 2 19 1010256 Retaining Pin 4 20 1032254 End Cap 1 21 1055010 Pan Head Screw 2 22 1035221 U--cup Seal 1 23 1035218 O--ring 1 24 1036160 Bushing 1 25 1035220 U--cup Seal 1 26 1065085 Piston Rod, Self Aligning 1 1065033 Piston Rod 27 1035127 O--ring 1 28 1009097 Piston 1 29 1035219 O--ring 1 30 1013147 Piston Ring Seal 1 31 1007311 Hex Lock Nut 1 32 1035217 O--ring 1 33 1008166 Cylinder Tube 1 34 1032191 Blind End Cap 1 35 1013206 Lock Ring 1 36 1008106 Cylinder Tube 1 37 1050220 Adaptor Fitting 1 3035014 Seal Kit (includes items 22, 23, 25, 27, 29, 30 and 32) 3008479 Hydraulic Cylinder Assy 3008211 (includes items 20--33) 3019047 Handle Assy (items 12--19) 3001006 Wire and Plug Assembly (includes items 1 and 2) 3018034 Trigger Lever Assembly (includes items 12, 14--16) Not included in current tools Hydraulic Cylinder Assembly
parts diagram and list page 6 of 16 1 1055331 Hex Head Screw 2 2 1061594 Plastic Tubing 9 inch long 1 3 1061592 Plastic Tubing 11 inch long 2 4 1051124 Tube to Pipe Connector 8 5 1055356 Flat Head Screw 2 6 3019083 Handle Assembly (includes 2 items 5, 14-31) 7 1042170 Handle Bracket 1 8 1055296 Hex Head Screw 4 9 1061342 Air Manifold 1 10 1061593 Plastic Tubing 7.5 inch long 1 11 1061591 Plastic Tubing 10 inch long 2 12 1042169 Handle Bracket 1 13 1035285 Gasket 2 14 1022096 Valve Housing 2 15 1014066 Compression Spring 2 16 1039042 Valve Plunger with item 31 2 17 1035162 O-ring 2 18 1035126 O-ring 2 19 1022095 Valve Bonnet 2 20 1013033 Internal Retaining Ring 2 21 1010110 Roll Pin 2 22 1019119 Switch Handle with items 2 21 and 30 23 1010273 Threaded Pin 4 24 1011210 Handle Coupling 2 25 1014097 Compression Spring 2 26 1021314 Cylindrical Bearing 2 27 1010275 Dowel Pin 2 28 1018111 Trigger Lever with items 2 26, 27, 29 29 1061368 Trigger Roller 2 30 1010297 Roll Pin 2 31 1035281 O-ring 2 32 1035307 Gasket 1 33 1032250 Connection Plate 1 34 1051100 Tube to Pipe Connector 3 35 1035244 O-ring 2 36 1016326 Connection Housing 1 37 1054098 Hex Head Screw with 2 item 35 38 1011308 Strain Relief Connector 1 39 1061340 Tubing Bundle, 20 ft 1 3019082 Handle Assembly (includes items 1-31) 3059020 Tubing Control Assembly (includes items 32-39) 3019141 Air Trigger Conv. Kit, 115v 3019193 Air Trigger Conv. Kit, 230v Figure C Air Triggers
parts diagram and list page 7 of 16 Figure D Electrical/Pneumatic Control Box (For Air Triggers) Not used in current tools 1 1063079 Ring Tongue Terminal 2 20 1051154 Tubing Connector 1 2 1004022 Internal Lock Washer 1 21 1055197 Socket Head Cap Screw 2 3 1063502 Fork Tongue Terminal 13 22 1004206 Washer 2 4 1072091 Glass Fuse, 115v 1 23 1007355 Hex Lock Nut 2 1063862 Glass Fuse, 220v 24 1055946 Socket Head Cap Screw 4 5 1063311 Pigtail Fuse, 115v 1 25 1072071 ATD Circuit Board, 115v 1 1063312 Pigtail Fuse, 220v 1072072 ATD Circuit Board, 220v 6 1005059 Electrical Switch 2 26 1016347 Control Box Enclosure 1 7 1051065 Pneumatic Actuator 2 27 1055010 Pan Head Screw 4 8 1051115 Tubing Connector 2 28 1032266 Mounting Plate 1 9 1004154 Washer 2 29 1007278 Locking Nut 3 10 1029445 Hex Spacer 4 30 1004211 Sealing Washer 3 11 1004244 Washer 4 31 1011240 Cord Connector 3 12 1073072 Plastic Pan Head Screw 4 32 1001089 Electric Cord, 3 ft 2 13 1051063 Tee Fitting 2 33 1017114 Wiring Diagram Label, 115v 1 14 1051153 Air Bleed Fitting 2 1017153 Wiring Diagram Label, 220v 1 15 1034014 Air Filter 1 34 1017012 Warning Label 1 16 1051001 Quick Connect Plug 1 17 1050027 Street Elbow 1 page 6 Tubing Control Assy 1 18 1050016 Hex Nipple 1 3063051 Complete Control Box, 115v 19 1050057 Female Elbow 1 3063178 Complete Control Box, 220v
parts diagram and list page 8 of 16 Figure E Electric Triggers 1 1018113 Trigger Lever with item 2 2 2 1021314 Bushing 2 3 1014096 Spring 2 4 1019138 Handle with item 13 2 5 3005030 Switch Assembly 2 6 1035282 O--ring 2 7 1042264 Right Side Bracket 1 1042265 Left Side Bracket 1 8 1050255 Tube Connector 2 9 1063396 Right Side Conduit 1 1063397 Left Side Conduit 1 10 1055285 Hex Head Screw 8 11 1004005 Split Lock Washer 8 12 1010273 Threaded Pin 4 13 1010297 Roll Pin 2 3019129 Handle Assemblies (includes items 1--13)
parts diagram and list page 9 of 16 Figure F Electrical Control Box (For Electric Triggers) 1 1016353 Electrical Box Enclosure 1 2 1063502 Fork Tongue Terminal 9 3 1007278 Locking Nut 4 4 1004211 Seal Ring Washer 4 5 1011240 Strain Relief 4 6 1063208 Female Twist Lock Outlet 1 7 1001153 Electric Cord 1 8 1001089 Electric Cord, 3 ft 2 9 1017112 Wiring Diagram Label, 115v 1 1017149 Wiring Diagram Label, 220v 10 1017012 Electric Warning Label 1 11 1063079 Ring Tongue Terminal 2 12 1004022 Internal Lock Washer 1 13 1072091 Glass Fuse, 115v 1 1063862 Glass Fuse, 220v Not used in current tools 14 1063311 Pigtail Fuse, 115v 1 1063312 Pigtail Fuse, 220v 15 1032266 Electrical Panel 1 16 1072071 ATD Circuit Board, 115v 1 1072072 ATD Circuit Board, 220v 17 1004244 Washer 4 18 1029445 Spacer 4 19 1073072 Plastic Screw 4 20 1055010 Pan Head Screw 4 21 1055946 Socket Head Cap Screw 4 3016191 Complete Control Box 115v 1 3016211 Complete Control Box 220v 1
parts diagram and list page 10 of 16 Figure G 4027044 or 4027088 Electric Air Not used in current tools 1 1034057 Filter Assembly with Element 1 1034059 Filter Element only 2 3016191 Electric Control Box, 115v 1 3016211 Electric Control Box, 220v 3063051 Elec/Pneu Control Box, 115v 3063178 Elec/Pneu Control Box, 220v 3 1071426 Return Tubing 1 4 1022121 Sub Plate with item 19 1 5 1071427 Supply Tubing, to Subplate 1 6 1011348 Motor Half Coupling 1 7 1011344 Spider Center Coupling 1 8 1011349 Pump Half Coupling 1 9 1071428 Supply Tubing, from Pump 1 10 3008073 Hydraulic Gear Pump 1 11 1022388 Directional Control Valve, 115v 1 1022390 Directional Control Valve, 220v 1072394 Rectangular din/iso Coil, 115v 2 1072395 Rectangular din/iso Coil, 220v 1063845 Round din/iso Coil for 1022023 1063846 Round din/iso Coil for 1022168 12 1072135 din/iso Connector, 115v 2 1072136 din/iso Connector, 220v 13 1055248 Socket Head Cap Screw 4 14 1034013 Breather Filler Cap 1 15 1050218 Elbow 2 16 1050089 Reducing Bushing 4 17 1050746 Pipe Nipple, 4 inch 1 18 1050747 Pipe Nipple, 6 inch 1 19 1022119 Relief Valve Cartridge 1 1022051 Sandwich Relief Valve 20 3034031 High Pressure Filter Assembly 1 1034105 High Pressure Filter Element 21 1059003 Hose Assembly 2 22 1034008 Suction Strainer 1 23 1025045 Oil Level Gage 1 24 1054166 Drain Plug with Magnet 1 25 1011108 Quick Connect Socket 1 26 1011107 Quick Connect Plug 1 27 1025008 Pressure Gage 1 28 1008210 Motor, 460/230v, 60hz 1 1008213 Motor, 440/380/220v, 50hz 1008196 Motor, 575v, 60Hz 1017085 Electric Danger Label 1
installation and wiring diagram page 11 of 16 Power Unit 4027044 Installation for Models with Electric Triggers INSTALLATION AND WIRING DIAGRAM Installation for Models with Air Triggers Electrical Control Box To Directional Control Valve To AC Power Supply Cord to Handles Balancer To AC Power Supply Return Line Pressure Line 50G Air Supply Inlet Connect A Connect B Connect C Connect A Air Trigger Handle Assembly Connect C Connect B Electrical Wiring Diagram
specifications and installation instructions page 12 of 16 SPECIFICATIONS Dehorner Cutting Force 9900 lbf 44 kn Cutting Cycle Time with 4027044 1.5 sec with 4027088 1.5 sec Control Handles Electric or Air Dual Anti -tie Down Blade Opening 5.5 x 6.0 in 140 x 152 mm Overall Length 30 in 762 mm Weight 65 lbs 29.5 kg Hydraulic Power Unit Power 4027044 10 hp 7457 W 4027088 10 hp 7457 W Voltage 460/230 V, 3 phase, 60 Hz other voltages and 50 Hz available Hose Length 16 ft 5 m Oil Capacity 30 gal 114 L Oil Viscosity at 100 F/40 C 200 SUS 46 ISO Dimensions(lxwxh) 38x28x33in 965x711x838mm Weight (without oil) 380 lbs 172 kg INSTALLATION INSTRUCTIONS Refer to installation and wiring diagram on page 11 as a guide. IMPORTANT: ALWAYS DISCONNECT ALL HYDRAU- LIC HOSES AND SHUT THE POWER OFF IN ACCOR- DANCE WITH OSHA S LOCKOUT/TAGOUT PROCE- DURES(29CFR1910.147)BEFOREPERFORMINGANY MAINTENANCE OR REPAIRS. ALL WIRING MUST BE DONE IN ACCORDANCE WITH NATIONAL, STATE AND LOCAL ELECTRICAL CODES. 1 Install the 50G above the work station from a balancer. Jarvis part number 4042039 is available. 1.1 The 50G should have sufficient travel to allow the operator to reach the entire work area. For best results mount the balancer on a rail 15-18 inches away from and parallel to the beef rail. 2 Install the hydraulic power unit above the operator s station. 3 Fill the oil reservoir with a USDA H1 approved premium grade hydraulic fluid (viscosity: 200 SUS at 100 F/46ISOat40 C). 4 Make all necessary air connections (for models with air triggers). 4.1 The air inlet pipe should be 3/8 inch diameter minimum. 4.2 The required compressed air supply is 40 psi minimum and 50 psi maximum. 4.3 An air regulator must be installed to the quick connect plug (item 16, Figure D, page 7) before the air supply inlet to the air filter (item 15, FigureD,page7). 4.4 Connect the air hoses to the electrical control box and the air trigger handle assembly (Connections A, B and C on page 11). 5 Make all the necessary wiring connections. All wiring must be done in accordance with the national, state and local electrical codes. Refer to Figure D, page 7 for air triggers and to Figure F, page 9 for electric triggers. 5.1 Attach wires numbered 2, 3 and ground to the appropriate AC power supply. 5.2 Attach wires numbered 4, 5, 6 and ground to the directional control valve. 5.3 Connect the twist lock receptacle attached to wires numbered 8, 9 and 10 to the twist lock plug on the 50G (for models with electric triggers). 6 Make all necessary hose connections. 6.1 Connect the pressure and return line hydraulic hoses to the power unit and the 50G dehorner. 7 Adjust the cutter opening time. 7.1 Close the cutter. 7.2 Release the triggers. 7.3 Set the timer on the ATD board so that the valve on the hydraulic power unit is de-energized when the blades have fully opened. Older boards use a square potentiometer with a screw driver slot. Newer boards use a group of four rocker switches.
operation and maintenance instructions page 13 of 16 OPERATION INSTRUCTIONS 1 Connect all hydraulic hoses. 2 Connect all air hoses (for models with air triggers). 3 Turn on the power. 4 Each day, before you begin operation, go through the following checklist: 4.1 Make sure that the 50G moves freely on the balancer. 4.2 Make sure that the dual anti -tie down control handles are working correctly. Depress each trigger separately and the blade should not close. Depress one trigger, then pause one second and depress the other trigger and the blade should not close. Repeat this procedure reversing the triggers. Depress both triggers simultaneously (within one half second of each other) and the blade should close. With the blade closed, release one trigger and the blade should open. Continue holding the depressed trigger and then depress the other trigger. The blade should not close. Repeat this procedure holding the other trigger. If the tool malfunctions, remove it from service and report the problem to your supervisor immediately. 4.3 Make sure that both guards (items 5 and 20, Figure A, page 4) are in good condition and are installed on the tool. 5 Making the cut: 5.1 Place the 50G over the skull. 5.2 Depress both triggers simultaneously to close the blades. 5.3 Release either or both triggers to open the blades. MAINTENANCE INSTRUCTIONS Refer to Figure A on page 4 for referenced items unless otherwise noted. IMPORTANT: ALWAYS DISCONNECT ALL HYDRAULIC HOSES AND SHUT THE POWER OFF IN ACCORDANCE WITH OSHA S LOCKOUT/TAGOUT PROCEDURES (29 CFR 1910.147) BEFORE SHARPENING, INSTALLING OR REMOV- ING A BLADE. ALWAYS DISCONNECT ALL HYDRAULIC HOSES AND SHUT THE POWER OFF IN ACCORDANCE WITH OSHA S LOCKOUT/TAGOUT PROCEDURES (29 CFR 1910.147) BEFORE PERFORMING ANY MAINTENANCE OR REPAIRS. 1 DAILY: 1.1 The 50G is equipped with dual anti -tie down control handles. Check for the correct operation of the dual anti -tie down control handles before each shift every day. Depress each trigger separately and the blade should not close. Depress one trigger, then pause one second and depress the other trigger and the blade should not close. Repeat this procedure reversing the triggers. Depress both triggers simultaneously (within one half second of each other) and the blade should close. With the blade closed, release one trigger and the blade should open. Continue holding the depressed trigger and then depress the other trigger. The blade should not close. Repeat this procedure holding the other trigger. If the tool malfunctions, repair or remove it from service immediately. Note: connect the hydraulic hoses and turn on the power to perform this operation only. 1.2 Inspect wire and plug assemblies (items 1-3, Figure B, page 5 and items 6-8, Figure F, page 9) over its full length for cuts or abrasions. Replace any abraded or damaged wire and plug assembly. 1.3 Inspect the hydraulic couplings, fittings and hoses (items 9-12) connected to the 50G dehorner. If there are any leaks, repair or replace the couplings, fittings or hoses. 1.4 Inspect the hydraulic couplings, fittings and hoses (items 15-18, 21, 25 and 26, Figure G, page 10) connected to the power unit. If there are any leaks, repair or replace the couplings, fittings or hoses. 1.5 Inspect the blade guards (items 5 and 20). Repair or replace if necessary. 1.6 Inspect all screws and nuts. Tighten if necessary.
maintenance instructions page 14 of 16 Figure 1 Figure 2 steel plate c--clamp 50G right angle plate grinding wheel cutting edge grinding table side view work bench 1.7 Loosen and remove hex head screws and split lock washers (items 33 and 34). 1.8 Loosen and remove hex head screws (items 18 and 29) or acorn nuts (item 8), as applicable. 1.9 Remove rail mounting plate (item 35). 1.10 Loosen and remove hex head screws (item 17). 1.11 Remove left guard plate (item 20). 1.12 Loosen and remove socket head cap screws (item 21). 1.13 Slide blades (items 24 and 26 or item 42) out of rails (items 19 or 25), as applicable. 1.14 Remove shim (item 23). 1.15 Inspect all parts for wear and replace if necessary. 1.16 Inspect blades (items 24 and 26 or item 42, as applicable) for wear and sharpen or replace if necessary. Follow instructions in BLADE RE- CONDITIONING, section 3 or 4, as applicable. See note below. 1.16.1 Note: Do not sharpen blade (item 24). It is designed to have a flat side (offset blades only). 2 BLADE RECONDITIONING (Offset Blades) : 2.1 Place blade (item 26) on a surface grinder table against a right angle plate. Refer to Figures 2 and 3. 2.1.1 Place the flat end of the blade (opposite the cutting edge) on the table. 2.1.2 Place the flat side of the blade (the scalloped side) against the right angle plate. 2.2 Clamp the blade to the right angle plate. Refer to Figures 2 and 3. Figure 3 right angle plate end view grinding wheel c--clamp grinding table 2.3 Grind the cutting edge flat and parallel to the flat edge of the blade that is against the table. 2.3.1 Grind only enough blade to clean the surface. 2.4 Remove the blade from the right angle plate. 2.5 Place the blade on the surface grinder table against a sine plate set at a forty five degree angle. Refer to Figures 4 and 5. Figure 4 sine plate grinding wheel side view cutting edge grinding table 2.5.1 Torque the hex head screws (items 18 and 29) to 150 lbf -ft or torque acorn nuts (item 8) to 200 lbf -ft, as applicable. 3 50G BLADE DISASSEMBLY: 3.1 Place the 50G on a flat piece of steel on a secure work bench.
maintenance instructions page 15 of 16 3.2 Clamp the 50G to the work bench. Refer to Figure 1 on page 14. 3.2.1 Note: The piston rod (item 26, Figure B, page 5) should be extended out with the blades (items 24 and 26 or item 42, as applicable) in the closed position before disassembly. 4.3 First grind surface A parallel to surface B, removing any nicks or chips on the cutting edge. Refer to Figure 7 below. Figure 7 Figure 5 right angle plate c--clamp grinding wheel sine plate -- C -- end view 45 grinding table 3.3 Grind the inside face of the cutting blade until the cutting edge has a 0.015 inch flat face. Refer to Figure 6 below. Figure 6 0.015 3.4 Reinstall the blade. Refer to section 5 as a procedural guide, Note: If adequate surface grinding facilities are not available, return the blade to Jarvis for re -sharpening. 4 BLADE RECONDITIONING (Cup Blades) : 4.1 Place blade (item 42) on a surface grinder table against a right angle plate. Refer to Figures 2 and 3, page 14. 4.1.1 Place the flat end of the blade (opposite the cutting edge) on the table. 4.1.2 Place the flat side of the blade (the scalloped side) against the right angle plate. 4.2 Clamp the blade to the right angle plate. Refer to Figures 2 and 3, page 14. 4.4 Remove the blade from the right angle plate. 4.5 Place the blade on the surface grinder table against a sine plate set at a forty five degree angle. Refer to Figures 4 and 5. 4.6 Grind surface C at a forty five degree angle to surface A to achieve a 0.030 inch flat on the end of the blade. 4.7 Repeat this procedure for the other blade (item 42) in the set. 4.8 Reinstall the blades. Refer to section 5 as a procedural guide. Note: If adequate surface grinding facilities are not available, return the blade to Jarvis for re -sharpening. 5 BLADE INSTALLATION: 5.1 Reverse steps and procedures outlined in section 2. See notes below. 5.1.1 Apply Jarvis 1315 White Grease to the sliding surfaces (top and bottom) of the moving blade (item 24 or 42, as applicable) and inside the track area of the rails (item 19 or 25, as applicable). 5.1.2 Tighten acorn nut (item 8) to 200 lbf -ft, if applicable. 5.1.3 Tighten hex head screws (items 18 and 29) to 150 lbf -ft, if applicable.
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