Komatsu Engine Seal Rear 6221-21-4522

Komatsu Engine Seal Rear 6221-21-4522 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6221-21-4522 is listed as Seal Rear. Search also by the no-dash alternate number 6221214522.

Engine book references

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

• ENGINES / SA6D108-1A-7 S/N 10001-UP / ENGINE / FLYWHEEL HOUSING (FOR ELECTRICAL GOVERNOR) (A2210-A2A4)
• ENGINES / SA6D108-1A-7C S/N 10001-UP / ENGINE / CYLINDER BLOCK GASKET KIT(#10058-) (A8119-B2A8)
• ENGINES / SA6D108-1A-7C S/N 10001-UP / ENGINE / FLYWHEEL HOUSING (FOR MECHANICAL GOVERNOR) (A2210-A2A8)
• ENGINES / SA6D108-1A-7T S/N 10001-UP / ENGINE / FLYWHEEL HOUSING (FOR ELECTRICAL GOVERNOR) (A2210-A2A4)
• ENGINES / SAA6D108E-2A S/N 19030-UP / ENGINE / CYLINDER BLOCK GASKET KIT (A8110-B2A8)
• ENGINES / SAA6D108E-2A S/N 19030-UP / ENGINE / FLYWHEEL HOUSING (A2210-A2A4)

This part appears in 23 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.