Komatsu WB156 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 WB156 pumps can vary by pump type, machine configuration, and serial number. This guide is designed to help customers researching pump applications for the Komatsu WB156 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

WB156-5 BACKHOE LOADER, WB156PS-5

Hydraulic Pumps

Below are example hydraulic pumps references associated with the Komatsu WB156 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 708-1U-00111 — Pump, Hydraulic
  • 708-1U-00112 — Pump, Hydraulic
  • 708-1U-00160 — Pump, Hydraulic
  • 708-1U-01162 — Pump, Sub Assembly
  • NSS — Case, Pump

Water Pumps

Below are example water pumps references associated with the Komatsu WB156 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6731-62-1120 — Kit, Water Pump

Oil Pumps

Below are example oil pumps references associated with the Komatsu WB156 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6737-51-1100 — Pump, Lubricating Oil

Fuel & Injection Pumps

Below are example fuel & injection pumps references associated with the Komatsu WB156 family. Some may be stocked products and others may be quote-based references depending on current catalog coverage.

  • 6731-72-3110 — Gear, Fuel Pump
  • 6731-72-3610 — Brace, Fuel Pump
  • 6732-71-3242 — Gasket, Fuel Pump
  • 6732-72-1160 — Pump, Fuel Injection

Additional Pump References

These additional pump references can help narrow the search for Komatsu WB156 pump applications.

  • 42N-04-12130 — Hose, Strainer To Primer Pump
  • 42N-33-11100 — Pump, Brake
  • 42N-33-11210 — Rod, Pump
  • 42N-54-17510 — Pump, Steering
  • 6731-72-1720 — Pump, Fuel Transfer

Identification Notes

For Komatsu WB156 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 WB156 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.