Disassembly; Inspection Cover And Wear; Suction Check Valve; Rotating Assembly - Pioneer ES Series Operation & Maintenance Manual

WARNING!!!
Select a clean suitable location for any required maintenance, and note that all work must be
performed by qualified personnel.
Before performing maintenance on your pump, verify the following:
1. Driver is shut down and power is locked out.
2. If pump components are hot, allow to adequately cool.
3. Suction and discharge valves are shut.
4. Drain pump after it has adequately cooled.
5. For power source maintenance refer to power source O & M manual.
6. Review all safety information and follow the instructions in this manual, as well as, all
tags, labels and decals attached to the pump or related equipment.

INSPECTION COVER AND WEAR

Once the pump has been drained, clean the
drain plug and reinstall into inspection cover.
Remove the four (4) hand lugs and use the
two (2) jackscrews provided to remove the
inspection cover and assembled wear plate.
Replace the wear plate if it is badly worn or
scored. To remove the wear plate, remove the
2 nuts (ES3, ES4) or 4 nuts (ES6). Inspect
the inspection cover o-rings and replace if
necessary.

SUCTION CHECK VALVE

With the inspection cover removed, the check valve can be
accessed without removing the suction piping. To service the
check valve assembly, remove the check valve bolt, reach
through the inspection cover opening and pull the complete
assembly from the suction flange. Service the check valve as
required.

ROTATING ASSEMBLY

The power source must be removed prior to removing the rotating assembly. Drain the oil in
the seal cavity by removing the seal cavity drain plug. Clean and replace the drain plug after
draining seal cavity of oil. Remove the four (4) nuts on the studs of the volute, and use the two

DISASSEMBLY

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