Inspection Cover And Wear Plate (P3B" Through P8B" Pumps); Suction Check Valve; Suction Head, Wear Plate, And Check Valve (P10B Pump) - Pioneer PB Series Operation & Maintenance 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 PLATE (P3B" THROUGH P8B" PUMPS)

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 (3" through 6" pump) 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 (3", 4" pumps), 4 nuts (6"
pumps), or 3 bolts (8" pump). Inspect the inspection cover o-ring and replace if necessary.

SUCTION CHECK VALVE

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.

SUCTION HEAD, WEAR PLATE, AND CHECK VALVE (P10B PUMP)

The suction piping must be removed prior to removing the suction head and wear plate. To
remove the suction head, support each end securely with lifting straps and remove the 4 bolts
from the flange. Use the 2 jackscrews to separate the suction head and wear plate assembly
from the volute. Remove the 4 hand knobs to remove the clean-out cover. To service the check
valve, unbolt the check valve housing from the suction head and unbolt the flapper pivot
support and remove flapper.
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