Pentair Plunger Pump 2221B-P

Ensure the following 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

Check the oil level using the dipstick

Use Hypro Oil (P/N 2160-0038) for lubrication

Enter the crankcase capacity for PowerLine Plus 2200B-P pumps

Change oil after 500 hours of operation

Is the recommended lubrication marked on the crankcase followed?

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.

Plunger Inspection and Replacement

Inspect the plungers for cracking or damage.

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

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 model series for torque specification