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RISK OF ELECTRICAL SHOCK OR ELECTROCUTION.
This pool pump must be installed by a licensed or certified electrician or a qualified pool serviceman in accordance
with the National Electrical Code and all applicable local codes and ordinances. Improper installation will create an
electrical hazard which could result in death or serious injury to pool users, installers, or others due to electrical shock,
and may also cause damage to property.
Always disconnect power to the pool pump at the circuit breaker before servicing the pump. Ensure that the
disconnected circuit is locked out or properly tagged so that it cannot be switched on while you are working on the pump. Failure to do
so could result in death or serious injury to serviceman, pool users or others due to electric shock.
Read all servicing instructions before working on the pump.
The pump is designed to allow for quick servicing of any moving parts without disturbing the plumbing
connections. The pump can be serviced with the common tools that are in nearly every service persons toolbox.
The following sequential instructions are for a complete disassembly in order to replace a failed motor. The same
instructions may be used to perform a partial disassembly to replace any internal component, but following all
steps will not be required.
It is recommended that you replace the motor with the Pentair replacement motor as identified in the Replacement
Parts section, on page 15. This motor has been thoroughly tested to ensure that it will function appropriately with the
pump under a wide variety of operating conditions. If you choose to use another replacement motor it is important that the frame type,
the HP, the service factor, the voltage, the phase and the motor speed match exactly to that listed on the original motor. Slight differences
in these parameters can cause the motor to not fit the pump correctly or cause the motor to fail prematurely.
Disassembly - Refer to Replacement Parts Section for Figures
1. Ensure the electric supply circuit is disconnected and is properly tagged and locked out.
2. Disconnect the line supply conductors and the ground conductor from the motor (1) if the motor is being
replaced.
3. Close any valves required to prevent flooding when the pump is disassembled.
4. Review the parts breakdown in the Replacement Parts section, on page 15, to understand how the pump
components are assembled together.
5. Remove the pump housing drain plug (24) and allow the pump to completely drain.
6. Remove the four 5/8-inch hex nuts (23) that secure the motor end assembly to the front housing (22).
7. If the motor support (2) is bolted to a permanent surface it will be necessary to remove the screws (6) that are
securing the motor to the motor support (2) to allow for removal of the motor end assembly.
8. Grasp the motor end assembly and pull backwards. It may be necessary to wiggle the motor assembly from
side to side to break free the O-ring seals inside the pump.
9. Pull the motor end assembly free of the housing (22) so that there is adequate access to the internal
components. If desired, the supply conductors can be disconnected and the motor end assembly can be
taken to a workbench for easier service.
10. Remove the four screws (20) with washers (18) and (19) that secure the diffuser (17) to the seal plate (13).
11. Hold the impeller (15) nose and remove the screw (16) and washers (4) and (5) that secure the impeller (15).
12. The impeller (15) is also secured to the shaft by a parallel key. The impeller (15) can be freed from the shaft
and key by grasping the outside of the impeller (15) and pulling the impeller (15) away from the motor (1). It is
good practice to inspect the impeller (15) to ensure that the vane passageways are open and that no vanes
have been substantially broken or worn.
EQ SERIES® High Performance Commercial Pump Installation and User' s Guide
11
SERVICING
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