Ampco Pumps Company Z Series Service Manual Download Page 1

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Z-Series: Metric Components

Service Manual

This service manual includes installation, operation, and maintenance instructions for

Ampco Pump Company’s Z-Series: ZCM and ZCHM. Failure to learn the correct procedures
for installing and servicing the pump from this manual could result in equipment failure.

Summary of Contents for Z Series

Page 1: ...ervice manual includes installation operation and maintenance instructions for Ampco Pump Company s Z Series ZCM and ZCHM Failure to learn the correct procedures for installing and servicing the pump from this manual could result in equipment failure ...

Page 2: ...ions until the pump is installed and is ready to be connected to the piping to stop debris from getting into the pump Pump Location Use the following pump location guidelines to help ensure proper pump performance Locate the pump so that the shortest and most direct possible suction piping can be used To facilitate priming ensure a steady flow and provide positive suction head locate the pump belo...

Page 3: ...iping It is very important that suction piping be selected and installed such that it minimizes pressure loss and allows sufficient liquid flow into the pump A proper suction piping system design can eliminate many NPSH problems The following precautions should be followed to ensure a proper suction piping system Suction piping must be kept as direct as possible It is suggested that any elbows be ...

Page 4: ...tion and discharge nozzles Pressure gauges will also indicate the presence of cavitation vapor binding or other unstable operation by showing wide fluctuations in suction and discharge pressures For these reasons Ampco highly recommends gauges Discharge Piping To ensure proper pump performance the following precautions regarding discharge piping should be followed If the discharge piping distance ...

Page 5: ...rements are met o Check that all motor and starting device wirings match the wiring diagram o Make sure the shaft rotates clockwise when viewed from behind the motor o Refer to motor instructions before starting if the motor has not been operated over an extended period of time o Make sure that that voltage phase and line circuit frequency match what is specified on the motor data plate o Turn sha...

Page 6: ...n remain filled but make sure the pump is fully primed prior to restarting If the pump is subject to freezing conditions then the pump exterior should be insulated or heated and the fluid within the pump casing must be kept moving in order to prevent freezing Extended Duration Shutdown For extended duration shutdowns close the suction piping gate valve or if no suction valve is installed then drai...

Page 7: ...ow ready to be performed For double seal assembly refer to instructions listed in Appendix B First the stationary seal 16 17 must be pressed into the cover or stuffing box 4 Temporary rubber emulsion or water should be used on the elastomer and the seal should be pressed in by hand Attach the cover to the pump adapter 5 or attach the stuffing box to the cover Then place the cover in the pump adapt...

Page 8: ...mpeller 3 onto the shaft 6 Apply the gasket or o ring 11 and torque the impeller screw to 50 60 ft lbs 68 81 Nm Use blue thread locker on the threads Figure 7 Step 7 illustration 8 Ensure the impeller does not rub against the cover by turning it by hand You are now ready to attach the pump casing 1 Have the screws ready and apply the casing to the cover Tighten all the casing screws in an alternat...

Page 9: ...F 750 025 A rev 12 20 ZCM ZCHM Series Metric Manual 8 Figure 9 Type 21 seal cross section parts diagram ...

Page 10: ... Impeller 1 4 Rear cover 1 5 Motor Adapter 1 6 Stub Shaft 1 7 Shaft Collar 1 8 Adapter Guard 2 9 Cover Gasket 1 10 Impeller Screw 1 11 Impeller O Ring 1 12 Shaft Sleeve 1 13 Shaft Sleeve O Ring 1 1 14 Shaft Sleeve O Ring 2 1 15 Seal Spring 1 16 Seal Cup 1 17 Seal Seat 1 18 Seal Face 1 19 Seal Retainer 1 20 Cover screws 8 21 Motor 1 22 Shaft Key 1 23 Seal Spring Retainer 1 ...

Page 11: ...8307337 3 Prepare the shaft sleeve 3 DX8307367 Refer to Figure 9 a With the flanged edge facing the inboard direction toward the impeller first put the shaft sleeve through the seal face in step 1 Apply the inboard rotating seal 4 onto the shaft sleeve with the use of temporary rubber emulsion lubricant or clean water You must do this sideways as gravity will allow the inboard seal face to drop ou...

Page 12: ...ring in the groove inside the sleeve and the O ring on the shoulder s face the double seal sub assembly is now complete and can be assembled onto the pump Slide the shaft sleeve onto the stub shaft until it seats on the shoulder of the shaft Continue pump assembly with step 6 Figure 11 Double seal parts list Number Description Qty per pump 1 Stuffing Box 1 2 Inboard Stationary Seal 1 3 Shaft Sleev...

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Ampco Pumps Company Z Series, Service Manual

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