Komatsu WB91 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 WB91 pumps can vary by pump type, machine configuration, and serial number. This guide is designed to help customers researching pump applications for the Komatsu WB91 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

WB91R-1 WB93R-1, WB91R-2, WB91R-5, WB91R-5E0

Hydraulic Pumps

Below are example hydraulic pumps references associated with the Komatsu WB91 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 840130023 — Hydraulic Pump, Assy. (Commercial)
  • 840180003 — Hydraulic Pump, Assy. (Hamworthy)
  • 885121013 — Pump Assy.
  • 840220102 — Pump Assy
  • CA0135190 — Pump Assembly

Water Pumps

Below are example water pumps references associated with the Komatsu WB91 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • P41313225 — Water Pump, Assy.
  • P41313237 — Water Pump, Assy.
  • YM123900-42000 — Water Pump, Assy.
  • YM123900-42070 — Case, Water Pump
  • EA4892175 — Water Pump

Oil Pumps

Below are example oil pumps references associated with the Komatsu WB91 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • DS0000039 — Oil Pump, Assy.
  • P41314182 — Pump
  • P4132F012 — Pump
  • EA4897480 — Oil Pump

Fuel & Injection Pumps

Below are example fuel & injection pumps references associated with the Komatsu WB91 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • P2643C199 — Injection Pump
  • P2643C249 — Injection Pump, Assy.
  • YM123911-51010 — Complete Pump
  • YM129612-52100 — Fuel Pump
  • YM723944-51310 — Fuel Injection Pump, Assy

Additional Pump References

These additional pump references can help narrow the search for Komatsu WB91 pump applications.

  • 880100046 — Brake Pump, Assy.
  • PK2641728 — Pump
  • This part cannot be supplied as an individual part. It is supplied as an assembly. — Pump Body
  • 880100068 — Brake Pump
  • CA0066598 — Pump Relief Valve Kit

Identification Notes

For Komatsu WB91 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 WB91 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.