Excavator Engine Parts
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6150-42-4210 is identified by Komatsu's official parts page as an engine valve. Exact-number valve catalogs classify it as the exhaust valve for 6D125-family engines, including S6D125E, SA6D125E and SAA6D125E variants. Published valve dimensions are approximately 44.0 mm head diameter, 9.0 mm stem diameter and 169.5 mm overall length. Exact application catalogs place this valve in PC400-5, PC400-6 and later PC400/PC450-family engine configurations, as well as selected D53, D65, D70, D85 and HM250 machines. Engine suffix and machine serial range change the cylinder-head configuration, so confirm 6150-42-4210 and the original valve dimensions before ordering.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Komatsu Part Number | Official engine-valve record | 6150-42-4210 |
| Formatted Alias | Same number without separators | 6150424210 |
| Paired Intake Valve | Related cylinder-head valve; not interchangeable | 6150-42-4110 |
Product fitment guide
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Before ordering
Machine fitment
4 model references
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Recorded compatible model references include Published Engine Families: Komatsu 6D125, S6D125E, SA6D125E and SAA6D125E variants, Excavator Catalog Coverage: PC400-5, PC400-6 and selected PC400/PC450 family configurations, Additional Equipment Coverage: Selected D53, D65, D70, D85 and HM250 configurations using the specified 6D125-family cylinder head, Fitment Limitation: Confirm 6150-42-4210, engine suffix, machine serial range, head diameter, stem diameter and valve length. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 6150424210.
Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.
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