Komatsu WA450 Pumps Guide

WQC Parts supplies WQ Certified aftermarket Komatsu parts and Komatsu replacement parts for heavy equipment applications. Use this guide to move from machine, model, pump type, or part-number research toward the correct replacement option. Built Better. Lasts Longer.

Komatsu WA450 pumps can vary by pump type, machine configuration, and serial number. This guide is designed to help customers researching pump applications for the Komatsu WA450 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

WA450-1, WA450-2, WA450-3, WA450-3-H, WA450-3-X, WA450-3A, WA450-3A-S, WA450-3A-ST, and more

Hydraulic Pumps

Below are example hydraulic pumps references associated with the Komatsu WA450 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 07952-70002 — Grease Pump Ass'Y
  • 705-12-34210 — Pump Ass'Y,(Sar50)
  • 705-12-36010 — Pump Ass'Y,(See Fig.2601)
  • 705-12-37010 — Pump Ass'Y,Steering (See Fig.4001)
  • 705-12-40040 — Pump Ass'Y,Steering (See Fig.4001A)

Water Pumps

Below are example water pumps references associated with the Komatsu WA450 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6151-61-1101 — Water Pump Ass'Y
  • 6151-K6-1202 — Gasket Kit,Water Pump
  • The part and the part specified in the line immediately above are interchangeable.6151-K6-1201 — Gasket Kit,Water Pump
  • The part specified in the line above can be used instead of this part6151-K6-1200 — Gasket Kit,Water Pump
  • 6151-61-1102 — Water Pump Ass'Y

Oil Pumps

Below are example oil pumps references associated with the Komatsu WA450 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6151-51-1005 — Oil Pump Ass'Y
  • The part specified in the line above can be used instead of this part6151-51-1002 — Oil Pump Ass'Y
  • The part specified in the line above can be used instead of this part6151-51-1004 — Oil Pump Ass'Y
  • This shows a discontinued part. The part specified in the above line is supplied instead.6151-51-1003 — Oil Pump Ass'Y
  • 1246 377 H1 — Cover, Lube Oil Pump

Fuel & Injection Pumps

Below are example fuel & injection pumps references associated with the Komatsu WA450 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6151-71-1116 — Injection Pump A.
  • 6151-71-1410 — Injection Pump A.
  • DK105217-1480 — Feed Pump Ass'Y
  • DK106069-5250 — Pump Ass'Y
  • DK106069-5420 — Pump Ass'Y

Gear Pumps

Below are example gear pumps references associated with the Komatsu WA450 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 421-U44-1760 — Gear Pump Ass'Y

Additional Pump References

These additional pump references can help narrow the search for Komatsu WA450 pump applications.

  • 07950-10450 — Pump
  • 711-47-31120 — Pump
  • 07124-01009 — Hose, Loader Pump To Control Valve
  • 07125-00606 — Hose, Switch And P.P.C. Pump To Control Valve
  • 07951-11400 — Nozzle, Grease Pump - Flexible Type

Identification Notes

For Komatsu WA450 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 WA450 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.