Komatsu Pin Piston 6151-31-2420

The Komatsu Pin Piston 6151-31-2420 is identified in the supplied parts catalog as a CYLINDER KIT & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D125-1 and S6D125E-2. Listed machine applications include D83E-1, D83P-1, D85A-21, D85A-21B, and D85E-21. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6151-31-2420 used for?

Part number 6151-31-2420 is cataloged as a Pin Piston. 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

S6D125-1, S6D125E-2

Engine models with serial-number ranges

S6D125-1 (Build 10C) ? Not Provided | S6D125-1 (Build 10D) ? Not Provided | S6D125E-2 (Build 10F) ? Not Provided

Application models without serial numbers

D83E-1, D83P-1, D85A-21, D85A-21B, D85E-21, D85P-21, PC300-3, PC300LC-3, PC360LC-3, D65EX-12, D65PX-12, D75A-1, D75S-5, D65EX-12, D65P-12, D65PX-12

Applications with serial-number ranges

D83E-1 S/No. 1001-Up, D83P-1 S/No. 1001-Up, D85A-21 S/No. 35001-36533, D85A-21B S/No. 35001-36536, D85E-21 S/No. 35001-36533, D85P-21 S/No. 3001-3688, PC300-3 S/No. 12001-UP, PC300LC-3 S/No. 12001-UP & A14398-Up, PC360LC-3 S/No. 10001-UP, D65EX-12 S/No. 60001-60941, D65PX-12 S/No. 60001-60883, D75A-1 S/No. 50001-Up, D75S-5 S/No. 15001-Up, D65EX-12 S/No. 60942-Up, D65P-12 S/No. 60884-Up, D65PX-12 S/No. 60884-Up

How do I confirm fitment?

Match 6151-31-2420 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 6151-31-2420 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.