Komatsu Fuel Nozzle Injector 6221-11-3120

The Komatsu Fuel Nozzle Injector 6221-11-3120 is identified in the supplied parts catalog as a FUEL SYSTEM 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 6221-11-3120 used for?

Part number 6221-11-3120 is cataloged as a Fuel Nozzle Injector. It appears in the FUEL SYSTEM 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 6221-11-3120 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 6221-11-3120 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.