Komatsu Retainer Piston Pin 6731-31-2420

The Komatsu Retainer Piston Pin 6731-31-2420 is identified in the supplied parts catalog as a CYLINDER KIT & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include SAA6D107E-1. Listed machine applications include PC200-7, PC200LC-8, and PC210-8. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6731-31-2420 used for?

Part number 6731-31-2420 is cataloged as a Retainer Piston Pin. It appears in the CYLINDER KIT & COMPONENTS parts group. The correct selection depends on the engine model, machine model, and the applicable serial-number range.

Compatible engine models

SAA6D107E-1

Engine models with serial-number ranges

SAA6D107E-1 (Build 26A) ? 26500006-Up

Application models without serial numbers

PC200-7, PC200LC-8, PC210-8

How do I confirm fitment?

Match 6731-31-2420 to the existing part number and verify the complete engine model, equipment model, and serial number. A shared model name does not confirm compatibility because production changes can affect the required component.

Frequently asked question

Will 6731-31-2420 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.