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SECTION: Z4.20.150

ZM1788

1120

Supersedes

0714

NOTICE TO INSTALLER:  Instructions must remain with installation.

 

Since 1939 the name Zoeller

®

 has represented the standard for 

submersible dewatering and sewage pumps. The same high quality 
workmanship and easy maintenance design has been incorporated 
into this line of heavy-duty submersible grinder  pumps. 
 

This manual incorporates the parts list and repair instructions into 

one document to aid in the ownership of a Zoeller

®

 submersible grinder  

wastewater product. Please read and review this manual before repairing 

REPAIR MANUAL

71 SERIES SUBMERSIBLE GRINDER UNITS

Table of Contents

Safety Instructions .......................................................................1
Replacement Parts List  ............................................................2-3
Disassembly Procedures .............................................................4
Assembly Procedures ...............................................................5-6
Pump Wiring Diagrams ................................................................7
Service Checklist ..........................................................................8

Safety Instructions

TO AVOID SERIOUS OR FATAL PERSONAL INJURY OR MAJOR 

PROPERTY DAMAGE, READ AND FOLLOW ALL SAFETY  

INSTRUCTIONS IN THIS MANUAL AND ON THE PUMP.

THIS MANUAL IS INTENDED TO ASSIST IN THE INSTALLATION 

AND OPERATION OF THIS UNIT AND MUST BE KEPT WITH 

THE PUMP.

This is a 

SAFETY ALERT SYMBOL.

When you see this symbol on the pump or in the 

manual, look for one of the following signal words 

and be alert to the potential for personal injury or 

property damage.

Warns of hazards that 

WILL

 cause serious personal    

injury, death or major property damage.

Warns of hazards that 

CAN 

cause serious personal 

injury, death or major property damage.

Warns of hazards that 

CAN 

cause personal injury 

or property damage.

INDICATES SPECIAL INSTRUCTIONS WHICH ARE 

VERY IMPORTANT AND MUST BE FOLLOWED.

THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS 

PRIOR TO PERFORMING ANY WORK ON THIS PUMP.

MAINTAIN ALL SAFETY DECALS.

CAUTION

Short Term Storage

PLEASE FURNISH THE FOLLOWING INFORMATION:

•  Model Number

•  Part Number of Pump

•  Serial Number

•  System Voltage

•  Replacement Part Number and Description. (refer to pages 2 & 3)

To Order Replacement Parts

the product. Follow the steps and procedures listed on ZM1074 for a 
proper start-up upon installation. Many items contained within, when 
followed correctly, will not only ensure a long and problem-free life for 
the pump, but also save time and money during installation. Reference 
ZM1789 for owner’s manual on 71 Series Pumps. Should further 
assistance be necessary please call our Product Support Department 
at 1-800-928-PUMP (7867).

Storage of six months or less will not damage the submersible pump.  

However, to ensure the best possible protection, the following is 

advised:

  Store pump inside whenever possible or cover with some type of 

protective covering.

 

• 

Tape or seal in plastic bag the terminal ends of wire leads.

• 

Spray coat unpainted surfaces with rust-inhibiting oil.

• 

See ZM1789-Owner’s Manual before start-up.

MAIL TO:

  P.O. BOX 16347 • Louisville, KY  40256-0347

SHIP TO:

  3649 Cane Run Road • Louisville, KY  40211-1961

(502) 778-2731 • 1 (800) 928-PUMP • 

FAX

 (502) 774-3624

Visit our website:

zoellerengineered.com

Product information presented 

here reflects conditions at time 

of  publication. Consult factory 

regarding discrepancies or 

inconsistencies.

© Copyright 2020 Zoeller

®

 Co. All rights reserved.

Summary of Contents for 71 Series

Page 1: ...that CAN cause personal injury or property damage INDICATESSPECIALINSTRUCTIONSWHICHARE VERY IMPORTANT AND MUST BE FOLLOWED THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS PRIOR TO PERFORMING ANY WORK...

Page 2: ...2 Copyright 2020 Zoeller Co All rights reserved 2 1 3 4 5 6 8 9 1 2 10 11 3 13 14 15 16 17 18 19 1 18 20 24 21 21 23 22 25 26 27 28 40 25 29 30 34 36 7 12 37 38 39 37 35 31 3 32 33 ZEPA0499...

Page 3: ...1 see job folder for BOM 15 KEY IMPELLER 1 012528 16 BEARING LOWER 1 012516 note special instructions for installing this bearing the correct directions 17 MOISTURE SENSORS 1 015261 moisture sersor an...

Page 4: ...ated to work on the motor it may be easier to do so before removing the upper seal When the rotor and bearing are pulled from the adapter it will strip the seal off the shaft on the lower side F When...

Page 5: ...rs 7 Using a cross pattern tighten the screws to the seal clamp evenly Torque screws to 69 72 in lbs 5 Apply thread locker compound to ground screw and install ground wires to cover 6 Lightly oil and...

Page 6: ...e ring seals rotary seal cord connection and oil fill plugs NOTE Make certain that the pump is placed in the water so that no areas are present that would trap air such as the cavity around the lower...

Page 7: ...OHMS RESISTANCE SENSOR FAILURE PROBES BEFORE 6 2000 N O SENSOR FAILURE PROBES M2 M2 MOTOR BLACK OR WHITE BLACK OR WHITE WINDINGS THERMOSTAT T1 T1 BROWN M1 M1 T2 T2 PURPLE 3 2 1 3 3 2 2 1 1 CHAMBER SE...

Page 8: ...r defective Pit too small D Pump will not shut off Debris under float switch Float travel obstructed Defective or damaged float switch Magnetic starter contacts shorted Air lock check vent hole E Pump...

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