Komatsu Engine O-Ring 6251-51-9880

Komatsu Engine O-Ring 6251-51-9880 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6251-51-9880 is listed as O-Ring. Search also by the no-dash alternate number 6251519880.

Engine book references

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

• ENGINES / SAA6D125E-5 S/N 560001-UP / ENGINE / EXHAUST GAS RECIRCULATION (3/3) (EGR VALVE LUBRICATING OIL PIPING) (A1550-C3A1)
• ENGINES / SAA6D125E-5 S/N 560001-UP / ENGINE / TURBOCHARGER MOUNTING AND LUBRICATING OIL PIPING (A1530-A3K9)
• ENGINES / SAA6D125E-5-FR S/N 660001-UP (For PC400-8R/PC400LC-8R/PC450-8R/PC450LC-8R) / ENGINE CYLINDER HEAD AND ITS RELATED PARTS / TURBOCHARGER / TURBOCHARGER, MOUNTING PARTS (#660001-) (A1530-001002)
• ENGINES / SAA6D125E-5A S/N 560004-UP ( Standard Machine ) / ENGINE CYLINDER HEAD AND ITS RELATED PARTS / EXHAUST GAS RECIRCULATION (EGR) VALVE (3/3) (X16-0386480-03)
• ENGINES / SAA6D125E-5A S/N 560004-UP ( Standard Machine ) / ENGINE CYLINDER HEAD AND ITS RELATED PARTS / TURBOCHARGER (2/2) (X16-0385080-02)
• ENGINES / SAA6D125E-5A-02 S/N 560001-UP / ENGINE / EXHAUST GAS RECIRCULATION (3/3) (EGR VALVE LUBRICATING OIL PIPING)(#560004-) (A1550-C3A1)

This part appears in 87 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.