Step 1

If the liners or cylinder o-rings have been damaged, it is necessary to remove the fluid end for repair. The fluid end must also be removed to service the plunger rod oil seals.

Step 2

Remove the cylinder cover clamp(s) and covers as described in the previous section. Remove the outside corner fluid end bolts if they are still in place at this time.

Step 3

Rock the fluid end to loosen from the cylinders, then pull free off the fluid end studs. If pistons have already been removed, take care to insure that the piston liners do not fall off the front of the power end and become damaged

Step 4

The plunger nut must be removed to allow removal of the piston assembly. If the pistons have not been removed, remove the packing nut, then lift the liners out of the pump.  

Step 5

Inspect all parts for signs of wear or damage. Replace if required.

Step 6

Always replace the power frame gaskets when the piston liners have been moved or replaced.