Komatsu Engine O-Ring 7861-91-4220

Komatsu Engine O-Ring 7861-91-4220 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 7861-91-4220 is listed as O-Ring. Search also by the no-dash alternate number 7861914220.

Engine book references

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

• ENGINES / S4D95L-1A S/N 48797-UP / CYLINDER BLOCK / OIL PAN(#48797-67198) (0211)
• ENGINES / S4D95L-1A S/N 48797-UP / CYLINDER BLOCK / OIL PAN(#67199-) (0211A)
• ENGINES / S4D95L-1A S/N 48797-UP / ENGINE KIT / GASKET KIT (0991)
• ENGINES / S4D95L-1A S/N 48797-UP / ENGINE KIT / GASKET KIT (NOISE SUPPRESION SPEC.)(#48797-104432) (0992)
• ENGINES / S4D95L-1A-C S/N 48797-UP / ENGINE KIT / GASKET KIT (0991)
• ENGINES / S4D95L-1B S/N 48811-UP / CYLINDER BLOCK / OIL PAN(#48811-67402) (0211)

This part appears in 487 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.