Pentair Plunger Pump 2354B-CP

Drain the oil from the crankcase using a 9/16" hex wrench

Remove the plunger retaining nuts with a 9/16" hex wrench

Remove the plungers and slinger rings

Fill a one or five-gallon container with water

Is the water supply exceeding the required flow?

Suction Line and Strainer Check

Ensure the suction line is as large as or larger than the inlet port

Check if high-capacity, clean line strainers are used

Vacuum and Overheating Protection

Check the vacuum at the suction side

Protect the pump from direct sunlight and ensure adequate ventilation

Ensure all required tools are available

Replace the plunger seals if there is water leakage from the weephole

Use a 3/16" Allen wrench to remove the cylinder head bolts

Remove the head from the crankcase assembly

Rotate the shaft and remove the cup retainers from the plungers

Remove the cup retainer and the cup from the cylinder head

Remove the valve cap (Figure 9, Ref. 1)

Remove the valve assembly (Ref. 3) from the head using needle nose pliers

Remove the o-ring (Ref. 4) from below the valve assembly

Remove the o-ring (Ref. 2) from the valve cap

Reassemble the parts by reversing the disassembly steps

Select the series of the valve cap for torque specification

Remove the pump head from the crankcase as described in the packing replacement section.

Remove the plunger retaining nut.

Carefully slide the plunger off of the lower plunger.

Remove the o-ring from the lower plunger.

Remove the plunger retaining nut and slinger ring.

Inspect the plungers for cracking or damage.