Komatsu Engine O-Ring 6251-51-9910

Komatsu Engine O-Ring 6251-51-9910 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6251-51-9910 is listed as O-Ring. Search also by the no-dash alternate number 6251519910.

Engine book references

This part appears in Komatsu engine parts book paths such as:

• ENGINES / SAA12V140E-3D S/N 502369-UP (For WA900-3E0) / ENGINE FUEL SYSTEM / FUEL PIPING / FUEL PIPING, PRIMING PUMP, L.H. BANK (#502369-) (A4110-001003)
• ENGINES / SAA12V140E-3D S/N 502369-UP (For WA900-3E0) / ENGINE FUEL SYSTEM / FUEL PIPING / FUEL PIPING, PRIMING PUMP, R.H. BANK (#502369-) (A4110-001004)
• ENGINES / SAA12V140E-3D S/N 502369-UP (For WA900-3E0) / ENGINE FUEL SYSTEM / FUEL PIPING, FOR COLD AREA SPECIFICATION A (-30 DEG C) / FUEL PIPING, PRIMING PUMP, L.H. BANK (#503022-) (A4110-004003)
• ENGINES / SAA12V140E-3D S/N 502369-UP (For WA900-3E0) / ENGINE FUEL SYSTEM / FUEL PIPING, FOR COLD AREA SPECIFICATION A (-30 DEG C) / FUEL PIPING, PRIMING PUMP, R.H. BANK (#503022-) (A4110-004004)
• ENGINES / SAA12V140E-3D-02 S/N 500001-UP / ENGINE / CYLINDER BLOCK GASKET KIT (FOR WA900-3¤WA800-3)(#500076-) (A8120-A7A4)
• ENGINES / SAA12V140E-3D-02 S/N 500001-UP / ENGINE / FUEL PRIMING PUMP (L.H. BANK)(#500076-) (A4110-C7E7)

This part appears in 69 Komatsu engine book paths in our reference data.

Verification note

Always confirm final fitment by engine model, serial range, diagram callout, and part number before ordering. Hub references are provided to help buyers find the right engine section and related parts faster.

Keep Ops Moving

19PARTS organizes Komatsu engine parts around searchable engine-model hubs so rebuild shops, equipment owners, and fleet teams can identify parts and keep repairs moving.