MULTI-STAGE SEAWATER (MSS TM ) HIGH PRESSURE PUMPS Overhaul Manual For Desalination Reverse Osmosis Service Models: MSS-15 MSS-20 MSS-30 MSS-40 MSS-50 MSS-55 MSS-70 MSS-75 Main Office Tel: 734-241-3935 Fax: 734-241-5173 techsupport@fedco-usa.com FEDCO 800 Ternes Drive Monroe, MI 48162, USA Dubai Office Tel: 971-04-880-7344 Fax: 971-04-880-7354 techsupport-dubai@fedco.com Technopark, Plot TP10501 Jebel Ali South, PO Box 37603, Dubai, UAE www.fedco-usa.com Singapore Office Tel: 65-6779-0123 Fax: 65-6779-6900 techsupport-singapore@fedco.com Singapore Branch 82 Toh Guan Road East #C2-14-4 WaterHub Singapore, 608576 For patent coverage visit patent.fedco-usa.com MSS 15-75 Overhaul Manual, 02-015-XXXXXX-1
Table Of Contents MSS TM Series Warnings and Safety Precautions...5 Inspection of Service Kits Upon Receipt... 5 User Health and Safety... 6 In the Work Area... 6 Electrical Connections and Regulations... 6 Pump Overhaul...7 MSS Pump External Components... 7 MSS Pump Internal Components (MSS- 15/20/30/50/70)... 8 MSS Pump Internal Components (MSS- 40/55/75)... 9 Mechanical Seal Removal... 10 Mechanical Seal Installation... 13 HPSC Mechanical Seal Removal... 16 HPSC Mechanical Seal Installation... 19 Shaft Position Sensor Removal... 22 Shaft Position Sensor Installation... 23 Balance Disc Replacement... 25 Balance Disc Inspection... 30 Balance Disc Wear Chart... 30 Balance Disc Installation... 31 Stage Removal... 36 Stage Assembly... 39 Specifications...42 Cleaning... 42 Inspection... 42 Fastener Torque Specifications... 43 Pump Alignment Specifications... 43 Balance Disc Specifications... 43 Lubricants and Compounds... 43 Notes...44-2 -
Item Part Description BDK Balance Disc Kit MSK Mechanical Seal Kit MSK HP Mechanical Seal Kit HPSC OHK Overhaul Kit TNK Throttle Nipple Kit TNK HP Throttle Nipple Kit HP STG Stage Kit SHT Shaft Kit ORK O-Ring Kit ORK HP O-Ring Kit HP RRK Retaining Ring Kit RRK HP Retaining Ring Kit HP FCK Flex Coupling Kit ALK Alignment Kit 1 Shipping plug * 2 Stationary seal retaining ring X X X 3 Inlet washer X X X 4 Mechanical seal X X X 5 Mechanical seal shaft washer X X X 6 Rotating seal retaining ring X X X X 7 Inlet O-ring X X X X 8 Split collar retaining ring (MSS-15/20/30/50/70 only) X X X X 9 Split collar (MSS-15/20/30/50/70 only) X 10 Collar sleeve (MSS-15/20/30/50/70 only) X 11 Inlet ring * 12 Diffuser bearing X X 13 Stage spacer (MSS-15/20/30/50/70 only) X X 14 Diffuser bowl (+ First stage housing for MSS-15/20/30 only) X X 15 Impeller X X 16 Series spacer (MSS-15/20/30/50/70 two shell pumps only) X X 17 Series flange O-ring X X X X 18 Discharge ring * 19 Stage spacer (custom end spacer) X 20 Shaft washer/ balance disc washer X X 21 Bearing holder * 22 Balance disc key X X 23 Balance disc O-ring X X X X 24 Balance disc X X 25 Cavity cover O-ring X X X X 26 Discharge housing O-ring X X X X 27 Balance disc flatwasher X X 28 Balance disc lockwasher X X 29 Balance disc nut X X 30 Discharge housing retaining ring X X X 31 Pump shaft X 32 HP shaft bushing anti-roll pin X 33 HP shaft bushing X 34 HP shaft bushing O-ring X X 35 HPSC O-ring X X 36 HPSC retaining ring X X 37 Assembled flex coupling X X 38 Shaft key X X 39 Alignment pins X 40 SS shim set X 41 Throttle nipple elbow X X 42 Throttle nipple X X 43 Throttle nipple O-ring X X X X X X 44 Split cone (MSS-45/55/75 only) X X 45 Split cone nut (MSS-45/55/75 only) X X 46 Clamping neck ring (MSS-45/55/75 only) X X 47 Floating neck ring (MSS-45/55/75 only) X X * Not Included in any kit. Can be purchased separately. - 3 -
30 29 28 27 26 40 43 25 24 23 42 39 22 41 21 38 20 MSS-40/55/75 31 47 12 19 18 17 16 15 37 14 13 12 11 36 35 10 9 34 8 33 32 Figure 1 - Service Parts Kits Components 7 14 6 5 4 46 3 45 2 15 44 1-4 -
Warnings and Safety Precautions Inspection of Service Kits Upon Receipt Review the contents of the packing list to make sure all components have been included. Inspect all components for signs of damage which may have occurred during shipping. If damage is present or if the contents are incomplete, please contact your shipping company or a FEDCO representative before proceeding. Safety practices and precautions for the operation and maintenance of all FEDCO pump products MUST BE FOLLOWED. This information supplements oral or written instructions that may be received. Safety MUST be practiced as part of the standard operating procedures for this equipment during any installation and operation. To ensure that safe operating and maintenance procedures are followed, operators should develop and keep up a program of safety checks and current instructions. This manual contains certain operating and maintenance procedures that involve exposure to potentially hazardous situations. The levels of hazardous situations are as follows: DANGER Hazards which are IMMEDIATELY ACCESSIBLE, and capable of causing SEVERE PERSONAL INJURY OR DEATH. WARNING Hazards which are NOT IMMEDIATELY ACCESSIBLE, but are capable of causing SEVERE PERSONAL INJURY OR DEATH. CAUTION Hazards which are NOT IMMEDIATELY ACCESSIBLE, and can cause PERSONAL INJURY. ELECTRICAL HAZARD Hazards which are related to Electrical Components and can RESULT IN ELECTRICAL RISKS, SHOCK, ELECTROCUTION OR DEATH if instructions are not followed properly. PUNCTURE HAZARD Hazards which are NOT IMMEDIATELY ACCESSIBLE and can RESULT IN SEVERE PERSONAL INJURY OR DEATH if instructions are not followed properly. - 5 -
Installation Procedures Continued WARNING All pump and safety precautions must be followed to prevent physical injury to the operator. It is illegal to operate the equipment in an EU member state, which requires CE compliance, if the manual is not written in that state s language. If a translation is needed, please contact a FEDCO representative. CAUTION A pump is a pressure-generating device with rotating parts that can be hazardous. Any device containing generated pressure can rupture, explode or discharge its contents if it is over-pressurized and may possibly result in personal injury, property damage, environmental damage and death. All necessary precautions must be exercised to insure over-pressurization does not occur. FEDCO will not accept responsibility for physical injury, damage or delays caused by a failure to observe the instructions in this manual. WARNING Installation, operation or maintenance of the pump unit in any manner which is not covered in this manual could cause damage to the equipment, serious injury or death. This includes any modification to the equipment or the use of parts not provided by FEDCO. If there is a question regarding the intended use of the equipment, please contact a FEDCO representative before proceeding. CAUTION This manual clearly identifies accepted methods for safe disassembly and assembly. These methods must be strictly adhered to. WARNING Do not use the pump equipment for a different application than originally specified without the approval of a FEDCO representative. WARNING NEVER operate the pump equipment: below the minimum flow rate. when dry. without priming. without proper guards and safety devices installed. with the discharge valve closed. with the suction valve closed. MSS TM Series ELECTRICAL HAZARD Always follow the Lock-out / Tag-out procedure developed by your company before starting any maintenance or repair. Figure 2 - Typical Lock-Out Tag-Out Tag User Health and Safety Safety equipment and PPE (Personal Protection Equipment) should be used in accordance with company regulations. In the Work Area Always keep the work area clean and dry. Avoid all electrical dangers. Be aware of risks from electric shock or arc flash hazards. Utilize adequate lifting equipment and methods. Electrical Connections and Regulations Refer to the motor nameplate for specific electrical operating information. Electrical connections must be made by certified electricians in compliance with all international, national, state, and local regulations and codes. Insure the product is isolated from the power supply and cannot be accidentally energized. Make sure all thermal contacts are connected to a protection circuit according to product specifications. All electrical equipment must be properly grounded. During installation, service and repair, the companies Lock out / Tag out procedure must be followed. - 6 -
Pump Overhaul MSS Pump External Components 11 9 10 12 1 2 3 6 7 13 5 8 4 21 20 19 18 15 26 14 22 16 23 24 25 17 Figure 3 - Pump External Components Item Description Item Description 1 Precision leveling foot 14 Series shell (if equipped) 2 Shell support bracket 15 Series shell O-ring 3 Inlet housing bolts 16 Shell flange bolts 4 Inlet housing O-ring 17 End shell 5 Inlet housing 18 Discharge housing O-ring 6 High pressure seal carrier O-ring (if equipped) 19 Discharge housing 7 High pressure seal carrier (if equipped) 20 Discharge housing retaining ring 8 Leakage bushing 21 Retaining clips 9 Coupling guard screws (part of coupling guard) 22 Retaining clip cap screws 10 Coupling guard 23 Lock washer 11 Motor adapter 24 Throttle nipple 12 Motor adapter bolts 25 Throttle nipple O-ring 13 Flexible coupling 26 Bearing drain line - 7 -
Pump Overhaul Continued MSS TM Series MSS Pump Internal Components (MSS-15/20/30/50/70) 31 30 29 28 32 27 26 25 24 22 23 21 20 19 18 17 16 15 14 13 12 37 36 35 34 33 11 10 9 8 7 6 5 4 3 2 1 Figure 4 - Pump Internal Components (MSS-15/20/30/50/70) Item Description Item Description 1 Shipping plug (optional) 20 Shaft washer 2 Stationary seal retaining ring 21 Bearing holder 3 Inlet washer 22 Balance disc key 4 Mechanical seal 23 Balance disc O-ring 5 Mechanical seal shaft washer 24 Balance disc 6 Rotating seal retaining ring 25 Cavity cover O-ring 7 Inlet O-ring 26 Discharge housing O-ring 8 Split collar retaining ring 27 Balance disc flatwasher 9 Split collar 28 Balance disc lockwasher 10 Collar sleeve 29 Balance disc nut 11 Inlet ring 30 Discharge housing retaining ring 12 Diffuser bearing 31 Throttle nipple O-ring 13 Stage spacer 32 Pump shaft 14 Diffuser bowl/ first stage housing 33 HP shaft bushing anti-roll pin 15 Impeller 34 HP shaft bushing 16 Series spacer (two shell pumps only) 35 HP shaft bushing O-ring 17 Series flange O-ring 36 HPSC O-ring 18 Discharge ring 37 HPSC retaining ring 19 Stage spacer (custom end spacer) - 8 -
Pump Overhaul Continued MSS Pump Internal Components (MSS-40/55/75) 29 30 28 27 26 25 24 23 22 20 21 19 18 17 15 16 14 13 12 11 10 9 8 35 34 33 32 31 7 6 5 4 3 2 1 Figure 5 - Pump Internal Components (MSS-40/55/75) Item Description Item Description 1 Shipping plug (optional) 19 Bearing holder 2 Stationary seal retaining ring 20 Balance disc key 3 Inlet washer 21 Balance disc O-ring 4 Mechanical seal 22 Balance disc 5 Mechanical seal shaft washer 23 Cavity cover O-ring 6 Rotating seal retaining ring 24 Discharge housing O-ring 7 Inlet O-ring 25 Balance disc flatwasher 8 Inlet ring 26 Balance disc lockwasher 9 Diffuser bearing 27 Balance disc nut 10 Floating neck ring 28 Discharge housing retaining ring 11 Diffuser 29 Throttle nipple O-ring 12 Clamping neck ring 30 Pump shaft 13 Split cone nut 31 HP shaft bushing anti-roll pin 14 Impeller 32 HP shaft bushing 15 Split cone 33 HP shaft bushing O-ring 16 Series flange O-ring 34 HPSC O-ring 17 Discharge ring 35 HPSC retaining ring 18 Balance disc washer - 9 -
Pump Overhaul Continued Mechanical Seal Removal MSS TM Series 1 2 3 4 5 6 Item Description 1 Shaft retaining ring 2 Shaft washer 3 Mechanical seal 4 Stationary seal (with O-ring) 5 Inlet washer 6 Inlet retaining ring Mechanical Seal Standard ELECTRICAL HAZARD Make sure to disconnect the power supply to the motor before carrying out component replacement procedures. Follow all Lock out/ Tag out procedures developed by your company before starting any maintenance or repair. Figure 6 - Mechanical Seal Components Mechanical Seal Removal 1. Drain the piping and pump. 2. Disconnect the inlet and outlet piping. 3. Loosen the screws and remove the coupling guards. Figure 7 - Coupling Guard Removal 4. Remove the anchor bolts and washers from shell support bracket(s). Figure 8 - Support Bracket Anchor Bolt Removal - 10 -
Pump Overhaul Continued 5. Remove the motor adapter bolts and washers. Figure 9 - Motor Adapter Bolt Removal 6. Remove the nuts and the top cradle from the precision leveling foot. Figure 10 - Top Cradle Removal 7. Install the alignment pins to prevent damage to mechanical seal and carefully slide pump 30.5 cm (12 inches) away from motor. NOTES: Make sure to support inlet end of the pump on support bracket(s). Figure 11 - Separating Pump from Motor - 11 -
Pump Overhaul Continued 8. Remove the inlet housing bolts and washers from inlet housing. MSS TM Series Figure 12 - Removing Inlet Housing Bolts 9. Remove the motor adapter and shipping plug from the inlet housing. Figure 13 - Removing Motor Adapter and Shipping Plug 10. Remove the inlet retaining ring from the inlet housing. Figure 14 - Removing Inlet Retaining Ring - 12 -
NO YES Figure 15 - Removing Shaft Seal Pump Overhaul Continued 11. Apply soap and water to the shaft and using a suitable tool through the inlet housing, gently push the shaft washer, mechanical seal, stationary seal, and inlet washer toward the end of the shaft and remove. NOTES: Make sure to push the washer only. Do not push on the shaft retaining ring or damage may occur. NOTES: The shaft retaining ring does not need to be removed unless it is distorted or corroded and needs replacement. 12. Inspect the pump shaft, the shaft retaining ring, the inlet seal bore and the pump shaft for any damage. Remove any oil or dirt with a clean cloth. Figure 16 - Inspecting Retaining Ring, Pump Shaft and Bore Mechanical Seal Installation 1. Install the new shaft washer onto pump shaft and slide the washer against the shaft retaining ring. Figure 17 - Installing Shaft Washer - 13 -
Pump Overhaul Continued 2. Slide the new mechanical shaft seal followed by the new stationary seal and inlet washer onto shaft. MSS TM Series Figure 18 - Installing Mechanical and Stationary Seals 3. Press in on the inlet washer and install the inlet retaining ring into the groove on the inlet housing. NOTES: Make sure the inlet retaining ring is completely seated in the inlet housing groove. Figure 19 - Installing Inlet Retaining Ring 4. Install the shipping plug into the motor adapter seat. Figure 20 - Installing Shipping Plug - 14 -
Pump Overhaul Continued 5. Secure the inlet housing to the motor adapter with the inlet housing bolts and lock washers. Figure 21 - Installing Inlet Housing Bolts 6. Apply system compliant anti-seize compound into the pump shaft keyway and install the pump shaft key. NOTES: Key should fit securely with rounded end facing toward the pump. Figure 22 - Installing Pump Shaft Key 7. Carefully slide the pump against the motor making sure the pump shaft key slides smoothly into the flexible coupling. Push the pump by hand until the motor adapter and motor are in contact. NOTES: Make sure pump key shaft does not jam or fall out during installation. 8. Refer to Final Pump Alignment from the installation/ operation manual. Figure 23 - Attaching Pump to Motor - 15 -
Pump Overhaul Continued Optional High Inlet Pressure Seal Replacement MSS TM Series 6 1 2 3 4 5 7 8 9 10 11 Item Description Item Description 1 HP shaft bushing retaining ring 7 Shaft washer 2 HP shaft bushing O-ring 8 Mechanical seal 3 HP shaft bushing 9 Stationary seal 4 Shaft retaining ring 10 Inlet washer 5 High pressure seal carrier O-ring 11 Inlet retaining ring 6 High pressure seal carrier Figure 24 - High Pressure Seal Carrier Components Mechanical Seal Optional High Inlet Pressure Design ELECTRICAL HAZARD Make sure to disconnect the power supply to the motor before carrying out component replacement procedures. Follow all Lock out/tag out procedures developed by your company before starting any maintenance or repair. HPSC Mechanical Seal Removal 1. Perform Steps 1 through 7 in Mechanical Seal-Standard removal procedure. 2. Disconnect the drain line from the unit inlet and vent line(s) from the high pressure seal carrier. Figure 25 - Disconnecting Drain/ Vent Lines - 16 -
Pump Overhaul Continued 3. Remove the bolts and lock washers from the inlet housing. Figure 26 - Removing Inlet Housing Bolts 4. Remove the motor adapter and shipping plug from the inlet housing. Figure 27 - Removing Motor Adapter and Leakage Bushing 5. Remove the high pressure seal carrier from the inlet housing. Figure 28 - Removing High Pressure Seal Carrier - 17 -
Pump Overhaul Continued 6. Remove the inlet retaining ring, inlet washer, stationary seal, mechanical seal and shaft washer carrier. MSS TM Series Figure 29 - Removing Seal Components 7. Remove the high pressure seal carrier O-ring. Figure 30 - Removing High Pressure Seal Carrier O-Ring 8. Remove the shaft retaining ring, HP shaft bushing and O-ring. NOTES: If retaining ring appears worn or distorted, replace it. NOTES: The graphite shaft sleeve retaining ring does not need to be removed unless it is distorted or corroded and needs replacement. Figure 31 - Removing Graphite Sleeve Components - 18 -
Pump Overhaul Continued 9. Inspect the high pressure seal carrier and inlet housing seal bores and shaft area for excessive wear or damage. Remove any oil of dirt with a clean cloth. Figure 32 - Inspecting Seal Carrier and Pump Shaft HPSC Mechanical Seal Installation 1. Lubricate and install a new O-ring with the HP shaft bushing and shaft retaining ring. NOTES: Make sure the anti-rotation pin slot is aligned with the top of the shaft. NOTES: Make sure the graphite shaft sleeve retaining ring is completely seated in shaft groove. Figure 33 - Installing Graphite Sleeve Components 2. Install the new high pressure seal carrier O-ring. Figure 34 - Installing New High Pressure Seal Carrier O-ring - 19 -
Pump Overhaul Continued 3. Install the new shaft washer, mechanical seal, stationary seal and inlet washer. Secure with the inlet retaining ring. NOTES: Make sure the inlet retaining ring is completely seated in the high pressure seal carrier groove. MSS TM Series Figure 35 - Installing Seal Components 4. Position the high pressure seal carrier against inlet housing. NOTES: Make sure graphite shaft sleeve lines up with anti-rotation pin in high pressure seal carrier. Figure 36 - Aligning Graphite Shaft Sleeve 5. Install the shipping plug into the motor adapter seat. NOTES: For units equipped with a high pressure seal carrier, make sure the shipping plug is installed with the stepped portion of the bushing facing inward toward the motor adapter. Figure 37 - Installing Leakage Bushing - 20 -
Pump Overhaul Continued 6. Install the motor adapter. Figure 38 - Installing Motor Adapter 7. Secure the motor adapter to the high pressure seal carrier and inlet housing with bolts and lock washers. Figure 39 - Installing High Pressure Seal Carrier Bolts 8. Connect the drain lines to the unit inlet and any vent lines to the high pressure seal carrier NOTES: Make sure the vent line is clean and unplugged. The line should be vented to the atmosphere and positioned to drain normally or connected to a low pressure manifold behind the first high pressure pump in the train. Under no circumstances should the vent line be plugged. A plugged vent line will result in insufficient water lubrication of the seal and balance disc causing internal damage to the unit. Figure 40 - Installing Drain/ Vent Lines 9. Perform Steps 6, 7 and 8 in Mechanical Seal Installation procedure in the previous section. - 21 -
Pump Overhaul Continued Optional Shaft Position Sensor Replacement MSS TM Series 1 2 3 5 4 Item Description 1 Light emitting diode 2 Adjustment shaft locknut 3 Shaft position sensor 4 Shaft collar 5 Spacer plate Figure 41 - Shaft Position Sensor Components Optional Shaft Position Sensor ELECTRICAL HAZARD Make sure to disconnect the power supply to the motor before carrying out component replacement procedures. Follow all Lock out/tag out procedures developed by your company before starting any maintenance or repair. Shaft Position Sensor Removal 1. Disconnect the shaft position sensor from its power source. 2. Loosen the adjustment locknut at the top of the spacer plate. Adjustment Locknut Figure 42 - Loosening Adjustment Locknut - 22 -
Pump Overhaul Continued 3. Unscrew and remove the shaft position sensor from the spacer plate. Figure 43 - Removing Shaft Position Sensor 4. Inspect the shaft collar to ensure it has not moved from its position on the pump shaft. NOTES: If the shaft collar has moved on the pump shaft, inspect the set screw keyway on the pump shaft for excessive wear. SHAFT COLLAR SET SCREW SET SCREW KEYWA Figure 44 - Inspecting Shaft Collar Shaft Position Sensor Installation CAUTION DO NOT supply the shaft position sensor with current and voltage higher than the sensor is rated to operate at. Higher than rated electrical current or voltage may damage the sensor. Figure 45 - Installing Shaft Position Sensor 1. Connect a temporary power supply to the shaft position sensor which will allow the sensor to rotate. 2. Loosely thread the shaft position sensor into the spacer plate. - 23 -
Pump Overhaul Continued 3. Slowly rotate the sensor clockwise until the sensor becomes illuminated with a green and red light. Once the sensor is illuminated, rotate the sensor a further one quarter (1/4) turn. ROTATE 1/4 TURN AFTER SENSOR ILLUMINATES MSS TM Series Figure 46 - Adjusting Shaft Position Sensor 4. Tighten the adjustment locknut to prevent sensor movement. NOTES: If a false shut down occurs after the adjustment procedure, loosen the adjustment locknut and rotate the sensor a further onequarter (1/4) turn to ensure no misadjustment has occured. TIGHTEN ADJUSTMENT LOCKNUT 5. Once the sensor is properly adjusted, disconnect the sensor from the temporary power supply and permanently connect the sensor to the VFD. Figure 47 - Tightening Adjustment Locknut - 24 -
Pump Overhaul Continued Balance Disc Replacement 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 15 17 18 Item Description Item Description 1 Cap screw 10 Lock washer 2 Lock washer 11 Washer 3 Retaining clip 12 Balance disc 4 Discharge housing retaining ring 13 Balance disc O-ring 5 Discharge housing O-ring 14 Balance disc key 6 Discharge housing 15 Balance disc washer 7 Cavity cover O-ring 16 Bearing carrier 8 cavity cover 17 Throttle nipple O-ring 9 Pump shaft nut 18 Throttle nipple Figure 48 - Balance Disc Componets - 25 -
Pump Overhaul Continued MSS TM Series ELECTRICAL HAZARD Make sure to disconnect the power supply to the motor before carrying out component replacement procedures. Follow all Lock out/tag out procedures developed by your company before starting any maintenance or repair. Balance Disc Removal 1. Drain the piping and pump. 2. Disconnect the outlet piping. 3. Disconnect the bearing drain line from the throttle nipple. Figure 49 - Disconnecting Drain Line 4. Remove the throttle nipple from the discharge housing. Figure 50 - Removing Throttle Nipple 5. Remove the throttle nipple O-ring from the discharge housing. Figure 51 - Removing Throttle Nipple O-Ring - 26 -
Pump Overhaul Continued 6. Remove the cap screws, lock washers and retention clips from the discharge housing. Figure 52 - Removing Discharge Housing Cap Screws 7. Remove the discharge housing retaining ring and discharge housing with O-ring from the end shell. Figure 53 - Removing Discharge Housing 8. Remove the cavity cover with O-ring. Figure 54 - Removing Cavity Cover - 27 -
Pump Overhaul Continued 9. Loosen the screws and remove the coupling guards. MSS TM Series Figure 55 - Removing Coupling Guards 10. Lock the flexible coupling in place with a suitable strap or chain wrench to prevent pump shaft rotation. SUITABLE STRAP OR CHAIN WRENCH Figure 56 - Securing Pump Shaft 11. Remove the shaft nut, lock washer and washer from the pump shaft. Figure 57 - Removing Shaft Nut and Washers - 28 -
Pump Overhaul Continued 12. Remove the bearing carrier with the balance disc from the end shell. Figure 58 - Removing Bearing Carrier and Balance Disc 13. Remove the balance disc key, washer and O-ring from the pump shaft. Figure 59 - Removing Balance Disc Washer and Key - 29 -
Pump Overhaul Continued Balance Disc Inspection 1. Inspect the surfaces of the balance disc for unusual wear. The surfaces may have some wear but should be smooth. FRONT SIDE MSS TM Series REAR REAR FRONT Figure 60 - Inspecting Balance Disc 2. Measure the balance disc outer hub thickness. Refer to the Balance Disc Wear Chart for wear limit specifications. The maximum acceptable balance disc wear is 0.508 mm (0.020 ). If the balance disc wear exceeds its wear limit, it must be replaced Balance Disc Model MSS-15 through MSS-75 Balance Disc Wear Chart Original Thickness When New 13.5 mm (0.53 ) Wear Limit - 0.508 mm (0.020") 13.0 mm (0.51 ) IF DISC IS WORN MORE THAN 0.508 mm (0.020 ) FROM ORIGINAL THICKNESS, REPLACE BALANCE DISC Figure 61 - Measuring Balance Disc 3. Inspect the bearing carrier for unusual wear or scoring and replace if necessary. Figure 62 - Inspecting Bearing Carrier - 30 -
Pump Overhaul Continued Balance Disc Installation 1. Carefully install the bearing carrier into the end shell. NOTES: Grasp pump shaft and lift so that bearing carrier is seated flush against the diffuser housing. Make sure the discharge housing anti-rotation pin is aligned with the top of the pump. Figure 63 - Installing Bearing Carrier 2. Install balance disc washer and seat on the balance disc retaining ring. Lubricate and install the balance disc O-ring. Apply system compliant anti-seize compound to balance disc keyway, and install the balance disc key NOTES: Make sure the balance disc keyway is on top and the key is installed with the rounded end facing outward toward the discharge housing. Figure 64 - Installing Balance Disc Key, Washer and O-Ring 3. Install the balance disc into bearing carrier. NOTES: Make sure the balance disc is firmly seated in the bearing carrier. Figure 65 - Installing Balance Disc - 31 -
Pump Overhaul Continued 4. Apply system compliant anti-seize compound onto the pump shaft threads and install the balance disc washer, lock washer and shaft nut. Tighten to torque value specified in the Fastener Torque Specifications section of this manual. NOTES: The pump shaft nut preload is critical to proper balance disc operation. A properly calibrated torque wrench must be used for this step. APPLY SYSTEM COMPLIANT ANTI-SEIZE COMPOUND MSS TM Series Figure 66 - Installing Balance Disc Washers and Nut 5. Lubricate the cavity cover O-ring and install the cavity cover. NOTES: Make sure to align throttle nipple opening with the bottom of the pump. Figure 67 - Installing Cavity Cover 6. Locate the discharge housing anti-rotation pin on the bearing carrier and note the location of the discharge housing antirotation pin hole. Figure 68 - Discharge Housing Alignment Pin - 32 -
Pump Overhaul Continued 7. Lubricate the discharge housing O-ring and install the discharge housing and retaining ring. NOTES: Make sure to align the throttle nipple opening in the discharge housing with the throttle nipple opening in cavity cover. Figure 69 - Installing Discharge Housing 8. Temporarily install the throttle nipple to ensure the cavity cover and the discharge housing are properly aligned. 9. Remove the throttle nipple. Figure 70 - Inspecting Discharge Housing Alignment 10. Install the retention clips, lock washers and cap screws. Tighten to torque value specified in the Fastener Torque Specifications section of this manual. Figure 71 - Install Discharge Housing Retaining Clips - 33 -
Pump Overhaul Continued 11. Lubricate and install the throttle nipple O-ring into the discharge housing. MSS TM Series Figure 72 - Installing Throttle Nipple O-Ring 12. Apply thread sealing tape to the throttle nipple threads and generously lubricate the non-threaded portion of the throttle nipple. LUBRICATE THREAD SEALING TAPE Figure 73 - Taping Throttle Nipple 13. Gently insert throttle nipple using a clockwise twisting motion to prevent dislodging the throttle nipple O-ring. Figure 74 - Installing Throttle Nipple - 34 -
Pump Overhaul Continued 14. Reconnect the bearing drain line to the throttle nipple. Figure 75 - Connecting Drain Line 15. Remove the strap or chain wrench and install the coupling guards and tighten the screws. Figure 76 - Installing Coupling Guards - 35 -
Pump Overhaul Continued Stage Replacement 4 MSS-40/55/75 3 4 5 6 7 2 3 2 1 1 MSS-15/20/30/50/70 Item Description 1 Stage Spacer 2 Impeller 3 Diffuser Bearing 4 Diffuser Item Description Item Description 1 Diffuser Bearing 5 Split Cone Nut 2 Floating Neck Ring 6 Impeller 3 Diffuser 7 Split Cone 4 Clamping Neck Ring Figure 77 - Stage Components Stage Removal NOTES: Place pump on flat surface in the vertical position. 1. Refer to Balance Disc Removal. 2. Install gauge block to keep shaft from slipping (not provided). Figure 78 - Install and Set Gauge Block 3. Preform the balance disc removal procedure as described earlier in this manual. 4. Remove pump shell (series + endshell or just endshell) bolts from inlet/ flanges. 5. Remove pump shells. Figure 79 - Remove Pump Shell - 36 -
Pump Overhaul Continued 6. Remove custom end spacer (MSS- 15/20/30/50/70 only). 7. Remove discharge ring. NOTES: The end spacer is dimensionally different from the stage spacers and needs to be kept separately. Figure 80 - Discharge Ring Removal 8. Remove diffuser NOTES: The MSS-50 and MSS-70 models have the last diffuser housing welded in the shell and cannot be removed. Figure 81 - Diffuser Removal 9. For: - MSS-15/20/30/50/70 Remove stage spacer and impeller. - MSS-40/55/75 Remove spit cone, split cone nut, and impeller. Figure 82 - Impeller Removal - 37 -
Pump Overhaul Continued NOTES: For two shell pumps: - MSS-15/20/30/50/70 Remove the series spacer between shells. MSS TM Series - MSS-40/55/75 Remove mid inlet ring 10. Repeat stage removal process until all stages are removed. Figure 83 - Series Spacer/ Inlet Ring Removal 11. Remove the first diffuser housing (first stage housing). NOTES: This step is for the MSS-15/20/30 only. This diffuser doesn t include an impeller. Figure 84 - First Stage Housing Removal 12. Shaft will no longer be supported by stages, and will fall over if not supported by the mechanical seal and shipping plug (if installed). NOTES: The shaft must be supported to avoid damage to the bushing and seal. Figure 85 - Shaft Support - 38 -
Pump Overhaul Continued 13. Remove the first spacer (MSS- 15/20/30/50/70 only). 14. Inspect and remove the shaft if necessary. 15. Remove and inspect inlet ring and check for damage, replace if necessary. Figure 86 - Shaft. Inlet Ring Removal Stage Assembly 1. With the pump inlet bolted on to the motor mount. Slide the shaft through the shipping plug and support it on the gauge block. NOTES: Contact FEDCO field service for gauge block height. The pump serial number must be provided. Figure 87 - Shaft Assembly 2. Install inlet ring. 3. Slide on the first spacer and install first diffuser (MSS-15/20/30/50/70 only). NOTES: The MSS-15/20/30 diffuser doesn t include an impeller. Figure 88 - Inlet Ring/ Diffuser Assembly - 39 -
Pump Overhaul Continued 4. For: - MSS-15/20/30/50/70 Install impeller onto the shaft and let it rest on the stage spacer. - MSS-40/55/75 Install diffuser, impeller with spit cone, split cone nut, and stage wear ring. Snug Impeller to shaft, remove temporary spacer washers, and fully tighten split cone nut to specified torque value. 5. Repeat the process until required amount of stages are installed. NOTES: For the MSS-40/55/75, a.095 gap must be present between diffusers to set impeller height. Temporally install spacer washers until the split cone nut is fully tightened. 6. Single Shell Pump: - MSS-15/20/30/50/70 a) Install discharge ring b) Install endshell (reference next step). c) 4X spot weld discharge ring to diffuser (MSS-50/70 only). - MSS-40/55/75 a) Install discharge ring b) Install endshell (reference next step). MSS TM Series Figure 89 - Impeller/ Diffuser Assembly Multi Shell Pump: - MSS-15/20/30/50/70 a) Install series shell (reference next step). b) Install the series spacer between shells. c) 4X spot weld series shell to diffuser (MSS-50/70 only). d) Install remaining stages. e) Install discharge ring and end spacer. f) 4X spot weld final diffuser to discharge ring. (MSS-50/70 only). g) Install endshell (reference next step). h) 4X spot weld discharge ring to endshell (MSS-50/70 only). - MSS-40/55/75 a) Install series shell b) Install mid inlet ring. c) Install remaining stages. d) Install discharge ring. e) Install endshell (reference next step)..095 gap should be set between shells. Figure 90 - Single/ Multi Shell Configurations - 40 -
Pump Overhaul Continued 7. Single Shell Pump: Slide the endshell over the stage stack and fasten into inlet. Multi Shell Pump: Slide the series shell over the stage stack and fasten into inlet. Install shell O-ring and install the endshell and fasten to series shell flange. Figure 91 - Shell Assembly 8. Refer to Balance Disc Assembly - 41 -
Specifications MSS TM Series Cleaning WARNING NEVER use petroleum or alcohol based solvents when cleaning pump components. Solvents can degrade and damage vital seals and O-rings over time. Use fresh water with mild soap (Make sure cleaning chemical are compatible with membranes and other chemicals in the system) and rinse all components thoroughly with fresh water before assembly. Internal Components Clean all internal components with mild soap and fresh water. Rinse thoroughly before use. Internal components should dried with a clean, lint free cloth before assembly. Nameplate Protect nameplate integrity. Use considerable caution when cleaning. Do not use products that may damage painted or engraved surfaces. FEDCO recommends soap and fresh water for cleaning nameplate surfaces. Inspection Internal Components Inspect all internal components for signs of excessive wear or damage. Pay particular attention to bearing surfaces. Replace if necessary. Fasteners Inspect all fastener threads for signs of wear or distortion and replace if necessary. O-Rings Inspect all O-rings for cuts or damage and replace as necessary. WARNING Using compressed air can be hazardous. Observe safety precautions accordingly. - 42 -
Specifications Continued Fastener Torque Specifications Item Metric Standard Precision leveling foot top cradle nuts 34 N-m 25 Lb-ft Motor adapter bolts - 3/8" 34 N-m 25 Lb-ft Motor adapter bolts - 1/2" 81 N-m 60 Lb-ft Motor adapter bolts - 5/8" 108 N-m 80 Lb-ft Support bracket adjustment bolts 81 N-m 60 Lb-ft Inlet housing bolts MSS-15 through MSS-75 33 N-m 24 Lb-ft Inlet housing bolts MSS-90 through MSS-240 81 N-m 60 Lb-ft Inlet housing bolts (HPSC) MSS-15 through MSS-75 33 N-m 24 Lb-ft Inlet housing bolts (HPSC) MSS-90 through MSS-240 81 N-m 60 Lb-ft End shell flange bolts MSS-15 through MSS-120 81 N-m 60 Lb-ft End shell flange bolts MSS-160 through MSS-240 109 N-m 81 Lb-ft Series shell flange bolts MSS-15 through MSS-120 81 N-m 60 Lb-ft Series shell flange bolts MSS-160 through MSS-240 109 N-m 81 Lb-ft Discharge housing retaining clip cap screws 10 N-m 7 Lb-ft Pump shaft nut (balance disc nut) MSS-15 through MSS-75 68 N-m 50 Lb-ft Pump shaft nut (balance disc nut) MSS-90 through MSS-120 95 N-m 70 Lb-ft Pump shaft nut (balance disc nut) MSS-160 through MSS-240 123 N-m 91 Lb-ft Pump support bracket anchor bolt 108 N-m 80 Lb-ft Stage split cone nut MSS-40 through MSS-75 54 N-m 40 Lb-ft Stage split cone nut MSS-90 through MSS-120 101 N-m 75 Lb-ft Stage split cone nut MSS-160 through MSS-200 162 N-m 120 Lb-ft Stage split cone nut MSS-240 203 N-m 150 Lb-ft Pump Alignment Specifications Motor Adapter Gap Tolerances for non-uniform gaps Good 0.381 mm 0.015" Balance Disc Specifications Pump Model Original Thickness When New Wear Limit - 0.508 mm (0.020") MSS-15 through MSS-75 13.5 mm (0.531") 13.0 mm (0.511") MSS-90 & MSS-120 16.0 mm (0.630 ) 15.5 mm (0.610 ) MSS-160 through MSS-240 15.7 mm (0.618 ) 15.2 mm (0.598 ) Lubricants and Compounds Lubricant Standard Glycerine or fresh water with soap ASTM D1257 Anti-seize compound Compliant with specific system - 43 -
Notes - 44 -
Visit our website for the latest version of this document and more information. www.fedco-usa.com Main Office Tel: 734-241-3935 Fax: 734-241-5173 techsupport@fedco-usa.com FEDCO 800 Ternes Drive Monroe, MI 48162, USA Dubai Office Tel: 971-04-880-7344 Fax: 971-04-880-7354 techsupport-dubai@fedco.com Technopark, Plot TP10501 Jebel Ali South, PO Box 37603, Dubai, UAE Singapore Office Tel: 65-6779-0123 Fax: 65-6779-6900 techsupport-singapore@fedco.com Singapore Branch 82 Toh Guan Road East #C2-14-4 WaterHub Singapore, 608576 FEDCO Sales Office Service Center - 45 -