Komatsu Cylinder Kit KMP6221

The Komatsu Cylinder Kit KMP6221 is identified in the supplied parts catalog as a CYLINDER KIT & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D108-1. Listed machine applications include WA320-3-X / 3-XR, WA320-3, WA380-3, WA380-3H, and D57S-1B. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is KMP6221 used for?

Part number KMP6221 is cataloged as a Cylinder Kit. 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

S6D108-1

Engine models with serial-number ranges

S6D108-1 (Build 7A) ? 11731-Up

Application models without serial numbers

WA320-3-X / 3-XR, WA320-3, WA380-3, WA380-3H, D57S-1B

Applications with serial-number ranges

WA320-3-X / 3-XR S/No. 50001-52999, WA320-3 S/No. 53001-Up, WA380-3 S/No. 50001-Up, WA380-3H S/No. 20051-20500, D57S-1B S/No. 20001-Up

How do I confirm fitment?

Match KMP6221 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 KMP6221 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.