Komatsu PC138 Pumps Guide

Komatsu PC138 pumps can vary by pump type, machine configuration, and serial number. This guide is designed to help customers researching pump applications for the Komatsu PC138 family move from general machine intent toward the correct part number.

Use this page to review example pump references by type, then continue through the pump hub system or use the site search once you have a likely part number. The Komatsu parts book for the exact machine serial number remains the final authority for fitment.

Common Model References in This Family

PC138US-11, PC138US-2, PC138US-2 RR, PC138US-2-A, PC138US-2-AC, PC138US-2-AT, PC138US-2E, PC138US-8, and more

Hydraulic Pumps

Below are example hydraulic pumps references associated with the Komatsu PC138 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 07952-70004 — Pump Assembly
  • 6275-71-1120 — Pump Assembly, Supply
  • 6275-79-1200 — Pump Assembly
  • 708-3D-00040 — Pump Assembly
  • 708-3D-00041 — Pump Assembly

Water Pumps

Below are example water pumps references associated with the Komatsu PC138 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6275-61-1100 — Pump Assembly
  • 6731-62-1110 — Kit,Water Pump
  • 6732-61-4460 — Belt,Alternator And Water Pump
  • 6732-81-3540 — Belt,Alternator And Water Pump
  • 6735-61-1101 — Water Pump Ass'Y

Oil Pumps

Below are example oil pumps references associated with the Komatsu PC138 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6732-51-1111 — Oil Pump Ass'Y
  • 6732-51-1112 — Oil Pump Ass'Y
  • 6136-52-1620 — Pin,Dowel, Oil Pump
  • 6204-51-1620 — Shaft,Oil Pump
  • 6204-51-1711 — Bushing,Oil Pump

Fuel & Injection Pumps

Below are example fuel & injection pumps references associated with the Komatsu PC138 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 07005-01012 — Gasket,Injection Pump Oil Piping
  • 07005-01412 — Gasket,Fuel Tube (Injection Pump)
  • 6732-71-1361 — Injection Pump Ass'Y
  • 6737-71-1220 — Injection Pump Ass'Y
  • DK101041-9260 — Pump Ass'Y

Additional Pump References

These additional pump references can help narrow the search for Komatsu PC138 pump applications.

  • 07950-10450 — Grease Pump
  • 22P-00-21170 — Plate, Pump Secondary Drive, Swing Parking Brake Release, Lock Lever Auto Lock Release
  • 7835-53-7001 — Controller, Pump
  • 7835-53-7002 — Controller, Pump
  • 22B-00-11180 — Plate,Driving Pump An Emergency

Identification Notes

For Komatsu PC138 machines, pump selection should be confirmed using the machine model, serial number, and the parts-book diagram for the specific system application. Do not rely on model alone where serial-range changes or alternate pump arrangements may apply.

Where to Go Next

Need Help Confirming a Pump?

If you are researching a Komatsu PC138 pump and are not fully sure which part applies, gather the machine model, serial number, and any visible pump number before reaching out. That information can be used to guide you toward the correct pump and quote options.

For final confirmation, always verify against your Komatsu parts book for the exact machine serial number.