Komatsu Engine O-Ring 6240-71-5840

Komatsu Engine O-Ring 6240-71-5840 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6240-71-5840 is listed as O-Ring. Search also by the no-dash alternate number 6240715840.

Engine book references

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

• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / CYLINDER BLOCK GASKET KIT(#300043-) (A8110-B6A7)
• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / CYLINDER BLOCK GASKET KIT(#310043-) (A8120-A6A3)
• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / FUEL FILTER MOUNTING (WATER COOLING TURBOCHARGER SPEC.) (HIGH ALTITUDE SPEC.)(#310266-) (A4110-A6G7)
• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / FUEL FILTER MOUNTING (WATER COOLING TURBOCHARGER SPEC.)(#310216-310217) (A4110-A6G6)
• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / FUEL FILTER MOUNTING (WATER COOLING TURBOCHARGER SPEC.)(#310218-) (A4110-B6G6)
• ENGINES / SA6D170E-3A-7 S/N 310001-UP / ENGINE / FUEL FILTER MOUNTING(#310043-) (A4110-A6F4)

This part appears in 13 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.