Komatsu Ring Set Piston 51Z3100509

The Komatsu Ring Set Piston 51Z3100509 is identified in the supplied parts catalog as a CYLINDER KIT & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D170-1, S6D170E/SA6D170E/SAA6D170E-2, SA6D170-1, and SA8V170-1. Listed machine applications include D275A-2, PC650-1, WA600-1, WA600-1L, and D375A-3. Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 51Z3100509 used for?

Part number 51Z3100509 is cataloged as a Ring Set Piston. 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

S6D170-1, S6D170E/SA6D170E/SAA6D170E-2, SA6D170-1, SA8V170-1, SA12V170-1, SA12V170E-2A

Engine models with serial-number ranges

S6D170-1 (Build 15A) ? Not Provided | S6D170E/SA6D170E/SAA6D170E-2 (Build 15B) ? Not Provided | SA6D170-1 (Build 15C) ? Not Provided | SA6D170-1 (Build 15D) ? Not Provided | SA8V170-1 (Build 16A) ? 10001-Up | SA12V170-1 (Build 17A) ? Not Provided | SA12V170E-2A (Build 17B) ? Not Provided

Application models without serial numbers

D275A-2, PC650-1, WA600-1, WA600-1, WA600-1L, D375A-3, D375A-3, D375A-3AD / 3D, PC1000-1, PC1000LC-1, PC1000SE-1, PC1000SP-1, PC1100-6, PC1100LC-6, PC1100SP-6, WA600-3, WA700-1L, WA700-3, WA700-3L, D375A-1, D375A-2, WA700-1, HD465-3, D475A-1, WA800-1, HD785-2, D575A-2SD, D575A-2SR, D575A-3

Applications with serial-number ranges

D275A-2 S/No. 10001-Up, PC650-1 S/No. 10007-Up, WA600-1 S/No. 10001-Up, WA600-1 S/No. A10081-Up, WA600-1L S/No. A10391-Up, D375A-3 S/No. 17001-17500, D375A-3 S/No. 17501-Up, D375A-3AD / 3D S/No. 17001-Up, PC1000-1 S/No. 10001-Up, PC1000LC-1 S/No. 10001-Up, PC1000SE-1 S/No. 10001-Up, PC1000SP-1 S/No. 10001-Up, PC1100-6 S/No. 10001-Up, PC1100LC-6 S/No. 10001-Up, PC1100SP-6 S/No. 10001-Up, WA600-3 S/No. 50001-Up, WA700-1L S/No. A20001-Up, WA700-3 S/No. 50001-Up, WA700-3L S/No. A50001-Up, D375A-1 S/No. 15001-Up, D375A-2 S/No. , 16001-Up, WA700-1 S/No. 10001-Up, HD465-3 S/No. 2001-Up & A2060-Up, D475A-1 S/No. 10001-Up, WA800-1 S/No. 10001-Up, HD785-2 S/No. 1501-Up, D575A-2SD S/No. 10001-Up, D575A-2SR S/No. 10001-Up, D575A-3 S/No. 10101-Up

How do I confirm fitment?

Match 51Z3100509 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 51Z3100509 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.