Main & Relief Valve Description
This Main & Relief Valve is indexed for Komatsu s: Model Komatsu Excavator PC300-5. Compare reference number PC300-5 against the label on your existing Komatsu component before ordering.
Before checkout, compare OEM part number PC300-5, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.




