Excavator Starter Motors
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Cat identifies 3E-1865 as a 12-volt heavy-duty electric starting motor rated at 130 amps. The official compatible-model record lists D3C, D4C and D5C track-type tractors, 931C and 935C track loaders, IT12 toolcarriers and related configurations. Five selected owned photographs show the archived 3E-1865 starter from its drive, body and terminal sides. Confirm 3E-1865, 12 V, mounting arrangement, terminal layout 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 Cat Part Number | Official 12V heavy-duty starter identity | 3E-1865 |
| Same-number Formatting Variant | Search alias only | 3E1865 |
| Official Cat Reman Alternative | Remanufactured alternative; not a formatting alias | 0R-9271 |
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 Official Cat track-type tractors: D3C / D3C II / D4C / D4C II / D5C, Official Cat track loaders and toolcarriers: 931C / 931C II / 935C / 935C II / IT12, Fitment limitation: Confirm 3E-1865, 12 V, mounting arrangement, terminal layout and machine serial range before shipment. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 3E1865. Remanufactured references: 0R-9271.
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.
