Excavator Engine Parts
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6151-12-3100 is documented by Komatsu as an injector assembly/nozzle-holder injector. A certified Komatsu engine-family record associates it with a 125E-2/6D125-family configuration, and exact application catalogs include S6D125E equipment such as PC400 and PC450 excavators. Confirm the complete number, nozzle-holder configuration, fuel-line connection, engine arrangement and machine serial range before ordering.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Official Komatsu injector reference | 6151-12-3100 |
| Same-number Formatting Alias | Search alias only | 6151123100 |
| Related Injector - Verify Engine Arrangement | Different catalog family member | 6151-12-3200 |
| Related Injector - Verify Engine Arrangement | Different catalog family member | 6151-12-3400 |
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
3 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 Engine family: Komatsu 6D125 / S6D125E, Representative equipment: Komatsu PC400 / PC450 excavator families, Fitment limitation: Confirm number, injector configuration, engine arrangement and serial range. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 6151123100. Related assembly numbers (not direct interchanges): 6151-12-3200, 6151-12-3400.
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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