Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Komatsu cylinder-head assembly | 6251-11-1100 |
| Formatted Alias | Same number without separators | 6251111100 |
6 product photos · Select a thumbnail to change the main view.
Excavator Engine Parts
Cylinder-head assembly identified by Komatsu part number 6251-11-1100. Komatsu's official product page identifies the exact number as Cylinder Head A. Independent exact-number application records support SAA6D125E-5 engines in PC400-8 excavators and WA470-6 wheel loaders. The approved gallery shows an assembled head with valves and springs. Confirm the complete number, engine suffix, valve configuration, casting, ports and machine serial range before ordering.
Fitment status: Verified · Checked 2026-07-28Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Komatsu cylinder-head assembly | 6251-11-1100 |
| Formatted Alias | Same number without separators | 6251111100 |
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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
5 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 model: Komatsu SAA6D125E-5, Excavator application: Komatsu PC400-8, Wheel-loader application: Komatsu WA470-6, Local fitment record - Verify Serial: Komatsu PC450-8, Fitment limitation: Confirm complete number, engine suffix, casting, ports, valve configuration and machine serial range. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 6251111100.
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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