Komatsu Gasket Kit Lower 6138-K2-9901

The Komatsu Gasket Kit Lower 6138-K2-9901 is identified in the supplied parts catalog as a GASKET KITS & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D110-1 and SA6D110-1. Listed machine applications include WA350-1, GD615A-1, PC280LC-3, D66S-1, and WA380-1. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6138-K2-9901 used for?

Part number 6138-K2-9901 is cataloged as a Gasket Kit Lower. It appears in the GASKET KITS & COMPONENTS parts group. The correct selection depends on the engine model, machine model, and the applicable serial-number range.

Compatible engine models

S6D110-1, SA6D110-1

Engine models with serial-number ranges

S6D110-1 (Build 8A) ? 50195-Up | SA6D110-1 (Build 8B) ? 50001-Up

Application models without serial numbers

WA350-1, WA350-1, GD615A-1, PC280LC-3, D66S-1, WA380-1, WA380-1, WA400-1, WA420-1

Applications with serial-number ranges

WA350-1 S/No. 10001-Up, WA350-1 S/No. A11604-Up, GD615A-1 S/No. 50001-Up, PC280LC-3 S/No. 10001-Up, D66S-1 S/No. 1001-Up, WA380-1 S/No. 10001-Up, WA380-1 S/No. A20012-Up, WA400-1 S/No. 10001-Up, WA420-1 S/No. 10001-Up

How do I confirm fitment?

Match 6138-K2-9901 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 6138-K2-9901 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.