Komatsu Gear Crankshaft 6150-31-1121

The Komatsu Gear Crankshaft 6150-31-1121 is identified in the supplied parts catalog as a CRANKSHAFT & RELATED PARTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D125-1. Listed machine applications include D65EX-12, D65PX-12, D75A-1, and D75S-5. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6150-31-1121 used for?

Part number 6150-31-1121 is cataloged as a Gear Crankshaft. It appears in the CRANKSHAFT & RELATED PARTS parts group. The correct selection depends on the engine model, machine model, and the applicable serial-number range.

Compatible engine models

S6D125-1

Engine models with serial-number ranges

S6D125-1 (Build 10D) ? Not Provided

Application models without serial numbers

D65EX-12, D65PX-12, D75A-1, D75S-5

Applications with serial-number ranges

D65EX-12 S/No. 60001-60941, D65PX-12 S/No. 60001-60883, D75A-1 S/No. 50001-Up, D75S-5 S/No. 15001-Up

How do I confirm fitment?

Match 6150-31-1121 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 6150-31-1121 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.