Internal rotating and reciprocating components for the GP5142 power end — bearing covers, shaft seals, bearing cover O-ring, taper roller bearing, bearing shims, shaft protector guard, crankshaft, fitting key, connecting rod assembly, and crosshead assembly. These are the parts a technician works through during a major power end overhaul or when diagnosing mechanical noise, shaft play, or vibration at the drive end.

The three shim sizes (0.1 mm, 0.15 mm, 0.2 mm) are used in combination to set taper roller bearing preload during reassembly — having all three on hand before starting a bearing replacement saves a return trip. The crosshead assembly and connecting rod are individual line items, so partial overhauls are straightforward to source.

For external crankcase and oil hardware, see GP5142 Power End Assembly Parts. Most part numbers in this group are shared with the GP5132.