Komatsu Ring Set Piston | Ring Set Piston STD 6731-31-2280

The Komatsu Ring Set Piston | Ring Set Piston STD 6731-31-2280 is identified in the supplied parts catalog as a CYLINDER KIT & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include SA4D102E-1AB and SA6D102E-1AC. Listed machine applications include PW170ES-6K, GD555-3C, PC270LC-6, PC290LC-6K, and PC290NLC-6K. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6731-31-2280 used for?

Part number 6731-31-2280 is cataloged as a Ring Set Piston | Ring Set Piston STD. 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

SA4D102E-1AB, SA6D102E-1AC

Engine models with serial-number ranges

SA4D102E-1AB (Build 3E) ? 21240928-Up | SA6D102E-1AC (Build 4D) ? 21288263-Up

Application models without serial numbers

PW170ES-6K, GD555-3C, PC270LC-6, PC290LC-6K, PC290NLC-6K

Applications with serial-number ranges

PW170ES-6K S/No. K30001-Up, GD555-3C S/No. 50001-Up, PC270LC-6 S/No. A83001-Up, PC290LC-6K S/No. K30001-Up, PC290NLC-6K S/No. K30001-Up

How do I confirm fitment?

Match 6731-31-2280 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 6731-31-2280 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.