Komatsu Gasket 6743-51-5550

The Komatsu Gasket 6743-51-5550 is identified in the supplied parts catalog as a GASKET KITS & COMPONENTS for specific Komatsu diesel engine and equipment configurations. Cataloged engine models include S6D114 and SAA6D114E-3. Listed machine applications include 538, 850, 850, 850, 850B, 850C, 870, 870B & 870C, 870, 870, TD-15C, TD-15E, PC300-7E0 (ecot3), PC350-7E0 (ecot3), PC300LC-7E0 (ecot3), and PC350LC-7E0 (ecot3). Use the complete model and serial-number details below to compare this part with the equipment being serviced.

What is 6743-51-5550 used for?

Part number 6743-51-5550 is cataloged as a Gasket. 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

S6D114, SAA6D114E-3

Engine models with serial-number ranges

S6D114 (Build 9) ? Not Provided | SAA6D114E-3 (Build 9H) ? 26850001-Up

Application models without serial numbers

538, 850, 850, 850, 850B, 850C, 870, 870B & 870C, 870, 870, TD-15C, TD-15E, PC300-7E0 (ecot3), PC350-7E0 (ecot3), PC300LC-7E0 (ecot3), PC350LC-7E0 (ecot3), PC340LC-7K-E0, PC340NLC-7K-E0, D65EX-16/D65PX-16/D65WX-16, WA430-6

Applications with serial-number ranges

538 S/No. U0030001-U003100 & C003101-Up, 850 S/No. U200000-U200416, 850 S/No. U200417-U201999, 850, 850B, 850C, 870, 870B & 870C S/No. U202002-Up, 870 S/No. U200000-U200416, 870 S/No. U200417- U201999, TD-15C S/No. P061366-Up, TD-15E S/No. U008001 – Up & P030501-Up, PC300-7E0 S/No. 50001 – UP (ecot3), PC350-7E0 S/No. 30001 – UP (ecot3), PC300LC-7E0 S/No. 50001 – UP (ecot3), PC350LC-7E0 S/No. 30001 – UP (ecot3), PC340LC-7K-E0 S/No. K45001 – UP, PC340NLC-7K-E0 S/No. K45001 – UP

How do I confirm fitment?

Match 6743-51-5550 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 6743-51-5550 fit every listed Komatsu machine?
No. Fitment is limited to the cataloged engine, application, and serial-number combinations. Confirm all identifying information before ordering.