Pentair EQ SERIES User Manual download pdf (Page 20)

EQ Series Pump Installation and User’s Guide

Disassembly

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 Section 8, to understand how the pump components are assembled together.

5. Remove the pump housing (22) drain plug (24) and allow the pump to completely drain.

6. Remove the four 5/8 in. 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) (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) (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.

13. Removing the impeller (15) will expose the two pieces of the mechanical seal (14). It will not be necessary to

further disassemble the pump if only a seal replacement is required.

14. The seal plate (13) is attached to the motor adaptor (7) by two dowel pins (26). The seal plate (13) can be freed

from these dowel pins (26) by grasping the outside of the seal plate (13) and pulling way from the motor wiggling

it from side to side if required.

15. Remove the four screws (10) with washers (8) (9) that secure the motor adaptor (7) to the motor (1). These

components could cause severe personal injury or death if they were to strike a person.

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Pentair EQ SERIES User Manual Page 20