Excavator Starter Motors
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Clockwise 24-volt, 4.5-kW, 10-tooth offset-gear-reduction starter identified by Cummins 3863128 and Denso 228000-0630/0631. Multiple construction-equipment and starter catalogs agree on the specification and map the family to Cummins B-series/6D102 applications including Komatsu PC200-6 and PC220 equipment. Confirm the precise Denso suffix, wet-clutch configuration and machine 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 | Cummins equipment number | 3863128 |
| Manufacturer Part Numbers | Denso suffix family; verify original label | 228000-0630 / 228000-0631 |
| Published Direct Cross-References | Verify wet-clutch and terminal configuration | Cummins 3864298 / 3920644 / 3970101 / Case 370226A1 |
| Published Equipment References | Verify application and serial range | Komatsu 600-863-4110 / 600-863-4210 |
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
8 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: Cummins 4B3.9 / 6B5.9 / 6BT5.9, Engine: Komatsu 6D102 / S6D102, Equipment: Komatsu PC200-6 / PC200-7, Equipment: Komatsu PC210-7 / PC220-6 / PC220-8, Equipment: Komatsu WA320-3, Equipment: Case 521D wheel loader, Hyundai catalog applications: HDF35A-2, Fitment limitation: Confirm 3863128 and the exact 228000-063x suffix, 24V, 4.5 kW, 10-tooth CW drive, wet-clutch configuration, flange and machine serial range. Confirm the complete part number and machine serial range before ordering.
Documented direct interchanges: Cummins 3864298 / 3920644 / 3970101 / Case 370226A1. Manufacturer number: 228000-0630 / 228000-0631.
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.
