Replacement components for the GP5142 power end — the crankcase housing, crankcase cover, oil management hardware, and drip tray. These are the structural and enclosure parts of the pump's drive section: the parts you work through when addressing an oil leak at the housing, repairing external damage, or replacing worn hardware without opening the drive train.

The crankcase and crankcase cover are the two major castings. Everything else in this group is low-cost hardware — drain plugs, gaskets, O-rings, dipstick, screws — available individually so a minor repair doesn't require sourcing the full assembly.

For parts related to the bearings, crankshaft, or connecting rods inside the power end, see GP5142 Bearing & Drive Train Parts. For the GP5132 equivalent, part numbers are shared across most of this group.