Komatsu Engine Dowel Ring 6128-21-4190

Komatsu Engine Dowel Ring 6128-21-4190 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6128-21-4190 is listed as Dowel Ring. Search also by the no-dash alternate number 6128214190.

Engine book references

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

• ENGINES / S6D155-4C S/N 10011-UP / CYLINDER BLOCK / FLYWHEEL¤ POWER TAKE OFF AND FLYWHEEL HOUSING (1222)
• ENGINES / SA6D140-2C S/N 40713-UP (For D355C-3) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / FLYWHEEL HOUSING / FLYWHEEL HOUSING, PTO (POWER TAKE OFF) ASSEMBLY (#40713-) (A2210-001002)
• ENGINES / SA6D140-2C-5G S/N 22537-UP / ENGINE / POWER TAKE OFF AND LUBRICATOR (EXTREME COLD TERRAIN SPEC.)(#29875-) (A2210-B4D9Z)
• ENGINES / SA6D140-2C-G S/N 22537-UP / ENGINE / POWER TAKE OFF AND LUBRICATOR(#25748-29874) (A2210-B4D9)
• ENGINES / SA6D140-2C-G S/N 22537-UP / ENGINE / POWER TAKE OFF AND LUBRICATOR(#29875-) (A2210-B4G3)
• ENGINES / SA6D155-4A S/N 50816-UP / CYLINDER BLOCK / POWER TAKE OFF (0225)

This part appears in 7 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.