Komatsu Pump Identification Guide

Identifying the correct Komatsu pump requires more than matching a machine model. In many cases, the right pump depends on the machine serial number, the system application, and the exact part number shown in the Komatsu parts book.

This guide is designed to help you narrow down what pump you have, understand which numbers matter, and move more confidently toward the correct replacement part.

What to Gather Before Identifying a Komatsu Pump

Before searching for a Komatsu pump, collect as much of the following information as possible:

  • Machine model
  • Machine serial number
  • Any known Komatsu part number
  • Pump tag number or nameplate number
  • Casting number on the housing
  • The system the pump supports, such as hydraulic, cooling, lubrication, or fuel

The more information you have, the easier it becomes to separate the correct pump from similar-looking assemblies.

Komatsu Part Number vs. Tag Number vs. Casting Number

Komatsu Part Number

This is the number you ultimately want to confirm in the parts book. It is the most useful number for ordering and cross-referencing, but it is not always visible on the pump itself.

Tag Number or Nameplate Number

Many pumps include a metal tag, plate, or identification marking from the pump manufacturer or assembly supplier. This number may help identify the pump family, but it is not always the same as the Komatsu service part number.

Casting Number

A casting number is often molded or cast into the housing. It can help narrow the pump body or component family, but it should not automatically be treated as the final orderable part number.

For best accuracy, always use these numbers as clues and confirm the final part number in the Komatsu parts book for the exact machine serial number.

How to Tell What Type of Pump You Are Looking At

Start by identifying what system the pump serves. This usually narrows the field quickly.

If you are unsure which category applies, start with the system function first, then verify the number against the parts book.

Why the Machine Serial Number Matters

Two Komatsu machines with the same model name may still use different pumps depending on serial range, production revision, region, or machine configuration. That is why model alone is not enough for final confirmation.

The Komatsu parts book tied to the exact machine serial number is the ultimate source of truth.

Common Identification Mistakes

  • Using only the machine model without the serial number
  • Ordering from a casting number alone
  • Assuming a manufacturer tag number is the Komatsu service part number
  • Confusing a hydraulic pump with a pilot, gear, or charge pump
  • Using an old or superseded number without cross-checking

These mistakes are common, especially when a pump has been removed, rebuilt, or replaced previously.

Use Part Numbers to Search Faster

If you already have a likely Komatsu pump part number, the fastest next step may be to use the search bar at the top of the site. If you are working from an alternate number or an older reference, the Komatsu Pump Cross Reference Guide can help you narrow down possible equivalents.

Where to Go Next

Need Help Identifying a Pump?

If you are not sure which Komatsu pump you need, gather your machine model, serial number, and any visible numbers from the pump. With that information, WQParts can help guide you toward the correct pump and available replacement options.

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