Komatsu Engine Seal Kit Rear Crank 6736-21-4221

Komatsu Engine Seal Kit Rear Crank 6736-21-4221 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6736-21-4221 is listed as Seal Kit Rear Crank. Search also by the no-dash alternate number 6736214221.

Engine book references

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

• ENGINES / S6D102E-D-1F-6S S/N 26200163-UP / ENGINE / FLYWHEEL HOUSING(#26253024-) (A2219-01A1B)
• ENGINES / S6D102E-D-1FL-6S S/N 26200163-UP / ENGINE / FLYWHEEL HOUSING(#26253024-) (A2219-01A1B)
• ENGINES / SA6D114E-2 S/N 26812075-UP / ENGINE / FLYWHEEL HOUSING (A2219-01C2)
• ENGINES / SA6D114E-2-TR S/N 26812075-UP / ENGINE / FLYWHEEL HOUSING (A2219-01C2)
• ENGINES / SAA4D107E-1A S/N 21714587 - Up (For PW140-7/PW148-8/PW160-7E0/PW160-8) / AA ENGINE / FLYWHEEL HOUSING (A221P-01A3)
• ENGINES / SAA4D107E-1A-W S/N 26503098-UP / ENGINE / FLYWHEEL HOUSING(#26506031-) (A2219-01B9)

This part appears in 88 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.