Komatsu HM400 Pumps Guide

Komatsu HM400 pumps can vary by pump type, machine configuration, and serial number. This guide is designed to help customers researching pump applications for the Komatsu HM400 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

HM400-1, HM400-1L, HM400-2, HM400-2R, HM400-3, HM400-3M0, HM400-3R, HM400-5

Hydraulic Pumps

Below are example hydraulic pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 07952-70004 — Grease Pump Ass'Y
  • 07952-80003 — Grease Pump Ass'Y
  • 56C-84-13110 — Pump Ass'Y
  • 705-22-40110 — Pump Ass'Y,(Sar100)
  • 705-40-01920 — Pump Ass'Y,(Sbl21)

Water Pumps

Below are example water pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6212-61-1203 — Water Pump Ass'Y
  • 6212-61-1205 — Water Pump Ass'Y
  • 6218-K6-9900 — Gasket Kit,Water Pump
  • This shows a discontinued part. The part specified in the above line is supplied instead.6212-61-1203 — Water Pump Ass'Y
  • This shows a discontinued part. The part specified in the above line is supplied instead.6212-61-1204 — Water Pump Ass'Y

Oil Pumps

Below are example oil pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6217-51-1510 — Gear,Pump Drive
  • 6218-51-2002 — Oil Pump Ass'Y
  • 6218-51-2004 — Oil Pump Ass'Y
  • The part and the part specified in the line immediately above are interchangeable.6218-51-2002 — Oil Pump Ass'Y
  • The part specified in the line above can be used instead of this part6218-51-2001 — Oil Pump Ass'Y

Fuel & Injection Pumps

Below are example fuel & injection pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6218-71-1110 — Fuel Pump Ass'Y
  • 6218-71-1111 — Fuel Pump Ass'Y
  • 6218-71-1130 — Fuel Pump Ass'Y
  • 6218-71-1131 — Fuel Pump Ass'Y
  • This shows a discontinued part. The part specified in the above line is supplied instead.6218-71-1110 — Fuel Pump Ass'Y

Gear Pumps

Below are example gear pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 705-12-20640 — Pump Ass'Y,(Sar8)
  • 705-12-21640 — Pump Ass'Y,(Sar10)
  • 705-22-40160 — Pump Ass'Y,(Sar100)
  • 705-22-40240 — Pump Ass'Y,(Sar100)

Charge Pumps

Below are example charge pumps references associated with the Komatsu HM400 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 705-22-25150 — Pump Assembly, Gear (Sar 18)
  • 705-22-25170 — Pump Assembly

Additional Pump References

These additional pump references can help narrow the search for Komatsu HM400 pump applications.

  • 07950-10450 — Pump
  • 6217-71-3220 — Gear,Pump Drive
  • 711-20-31120 — Pump
  • ND092130-0360 — Priming Pump
  • 56D-61-24380 — Pump

Identification Notes

For Komatsu HM400 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 HM400 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.