Komatsu Engine Spacer 6631-21-4650

Komatsu Engine Spacer 6631-21-4650 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6631-21-4650 is listed as Spacer. Search also by the no-dash alternate number 6631214650.

Engine book references

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

• ENGINES / S6D125-1C S/N 10001-UP / CYLINDER BLOCK / POWER TAKE OFF (2/2) (0242)
• ENGINES / S6D125-1C-FW S/N 10001-UP / ENGINE / POWER TAKE OFF (2/2) (A2250-02A6)
• ENGINES / S6D125-1D S/N 10001-UP / CYLINDER BLOCK / POWER TAKE OFF (2/2) (0242)
• ENGINES / S6D125-1D-AR S/N 10001-UP (For Egypt) / CYLINDER BLOCK / POWER TAKE OFF (2/2) (0242)
• ENGINES / S6D125-1D-FE S/N 10001-UP / ENGINE / POWER TAKE OFF (2/2) (A2250-02A6)
• ENGINES / S6D125-1EE S/N 10001-UP / CYLINDER BLOCK / POWER TAKE OFF (2/2) (0244)

This part appears in 12 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.