Pentair Plunger Pump 2431B-P

Remove six head bolts using a 1/4" Allen wrench.

Turn the shaft to push the head from the crankcase assembly.

Pull the head off the plungers.

Remove the cup retainer assembly from the cylinder head using fingers or external pliers.

Remove the Teflon backup ring and the high pressure cup from the head.

Remove the low pressure seal from the cup retainer with a small flat-blade screwdriver.

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 by reversing the disassembly steps

Enter the torque specifications for the valve cap

Ensure the pump is turned off and cooled down

Verify the following items are available

Check the oil level using the dipstick

Is the oil level within the recommended range?

Drain the old oil from the crankcase

Add new Hypro Oil (P/N 2160-0038)

Time to fill a one-gallon container

Time to fill a five-gallon container

Does the water supply exceed the required flow rate?

Suction Line and Strainer Check

Is the suction line size adequate?

Inspect line strainers for cleanliness and capacity

See the packing replacement instructions for head removal.

Remove the plunger nut, plunger and slinger ring.

Lift the oil seal retainer cartridge from the crankcase using a 90˚Allen wrench or bent bar.

Remove the o-ring from the outside of the cartridge.