Komatsu Engine Metal Lower Standard 6204-21-8120

Komatsu Engine Metal Lower Standard 6204-21-8120 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6204-21-8120 is listed as Metal Lower Standard. Search also by the no-dash alternate number 6204218120.

Engine book references

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

• ENGINES / SAA4D95LE-5A S/N 500001-UP (For PC138US-8/PC138USLC-8) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / CYLINDER BLOCK / CYLINDER BLOCK, CRANKSHAFT (#500001-) (ABB00-001001)
• ENGINES / SAA4D95LE-5D S/N 501795-UP (For PC130-8) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / CYLINDER BLOCK / CYLINDER BLOCK, CRANKSHAFT (#501795-) (ABB00-001001)
• ENGINES / SAA4D95LE-5E S/N 502711-UP (For PC88MR-8) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / CYLINDER BLOCK / CYLINDER BLOCK, CRANKSHAFT (#502711-) (ABB00-001001)
• ENGINES / SAA4D95LE-5G S/N 504574-UP (For PC78US-8/PC78UU-8) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / CYLINDER BLOCK / CYLINDER BLOCK, CRANKSHAFT (#504574-) (ABB00-001001)
• ENGINES / SAA4D95LE-5J S/N 506848-UP (For WA150-6/WA150PZ-6) / ENGINE CYLINDER BLOCK AND ITS RELATED PARTS / CYLINDER BLOCK / CYLINDER BLOCK, (1/3) (#506848-) (ABB00-001001)
• ENGINES / SAA4D95LE-5Q S/N 555215-up / B0 [ENGINE CYLINDER BLOCK AND ITS RELATED PARTS] / CYLINDER BLOCK (CRANKSHAFT) (|B00031)

This part appears in 9 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.