Excavator Starter Motors
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600-813-3631 is cataloged with Nikko 0-23000-6531 as a 24V 7.5kW clockwise OSGR starter with 12 teeth for Komatsu 6D105/6D125 equipment. The owned folder incorrectly says 11 teeth; published electrical catalogs consistently record 12. Confirm the physical pinion, right-hand mounting orientation, wet-clutch seal, flange, engine suffix and serial range.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Equipment Part Number | Komatsu starter reference | 600-813-3631 |
| Manufacturer Starter Number | Nikko reference | 0-23000-6531 |
| Formatted Alias | Same Komatsu number without separators | 6008133631 |
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 Engines: Komatsu 6D105 / 6D125, Representative machines: Komatsu PC300 and grader families, Komatsu catalog engine references: SA6D140-1N-G, Fitment limitation: Confirm pinion, orientation, seal, flange, suffix and serial. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: 0-23000-6531. Formatting aliases for the same number: 6008133631.
Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.
