Komatsu Engine Cover 6643-81-7551

Komatsu Engine Cover 6643-81-7551 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6643-81-7551 is listed as Cover. Search also by the no-dash alternate number 6643817551.

Engine book references

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

• ENGINES / S4D120-11F S/N 50026-UP / CYLINDER HEAD / AIR INTAKE MANIFOLD AND AIR CLEANER(#50026-75211) (111)
• ENGINES / S4D120-11F S/N 50026-UP / CYLINDER HEAD / AIR INTAKE MANIFOLD AND AIR CLEANER(#75212-) (111A)
• ENGINES / S4D120-11G S/N 50025-UP / CYLINDER HEAD / AIR INTAKE MANIFOLD AND AIR CLEANER(#50025-75211) (111)
• ENGINES / S4D120-11G S/N 50025-UP / CYLINDER HEAD / AIR INTAKE MANIFOLD AND AIR CLEANER(#75212-) (111A)
• ENGINES / S6D105-1F S/N 18302-UP / (167)
• ENGINES / S6D105-1F S/N 18302-UP / CYLINDER HEAD / AIR CLEANER OIL BATH TYPE AND PRE-CLEANER(#60844-) (167)

This part appears in 16 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.