Excavator Starter Motors
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OSGR starter identified by Isuzu-formatted number 1-81100-044-0 and compact number 1811000440. Exact-number starter records specify 24V, 11kW, clockwise rotation and an 11-tooth pinion for Isuzu 6RB1, 6RB1T and 12PB1 industrial engines, including Hitachi-system excavator applications. A specific EX400 serial range is not asserted. Confirm the physical label, pinion, flange, solenoid, engine variant and machine serial before ordering.
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 | Isuzu-formatted starter number | 1-81100-044-0 |
| Formatted Alias | Same Isuzu number without separators | 1811000440 |
| Manufacturer Cross-Reference | Hitachi starter family reference | S210-25 |
| Manufacturer Cross-Reference | Hitachi starter family reference | S210-62 |
| Manufacturer Cross-Reference | Hitachi starter family reference | S210-108 |
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 engines: Isuzu 6RB1 / 6RB1T / 12PB1, Published equipment family: Hitachi-system excavators using the listed Isuzu engine arrangement, Published equipment example: Link-Belt LS5800 with Isuzu 6RB1 / Hitachi system, Fitment limitation: Confirm label, output, pinion, flange, solenoid, engine variant and serial. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: S210-25, S210-62, S210-108. Formatting aliases for the same number: 1811000440.
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.
