Komatsu Hydraulic Pump Types Guide
Komatsu hydraulic systems often use multiple pump types working together. This page exists to help customers separate main pumps, pilot pumps, and charge pumps before they move into model-based research or begin searching by part number.
Knowing the pump type first can save a great deal of time. In many cases, the right next step is to identify whether the pump is responsible for primary hydraulic flow, control pressure, or support pressure within another system.
Main Hydraulic Pumps
Main pumps generate the primary hydraulic flow used for work equipment and travel functions. Continue deeper here: Komatsu Main Hydraulic Pumps Guide.
Pilot Pumps
Pilot pumps supply lower-pressure flow for control systems and operator response. Continue deeper here: Komatsu Pilot Pumps Guide.
Charge Pumps
Charge pumps maintain pressure and support specific hydraulic or transmission systems. Continue deeper here: Komatsu Charge Pumps Guide.
Use Model Hubs After You Know the Pump Type
Once you know whether you are dealing with a main, pilot, or charge pump, return to the Komatsu Pumps Guide and move into the model-hub directory to review machine-family pump references.
For final confirmation, always verify against your Komatsu parts book for the exact machine serial number.