Excavator Starter Motors
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Cat identifies 415-1804 as a 24-volt basic electric starting motor and lists C9.3, C9 and C13 industrial engines as compatible models. The official record specifies an SAE No. 3 nose housing and 120-amp current rating, and lists 20R-4882 as the Cat Reman alternative. Four selected owned photographs come from the 415-1804 archive and show the starter from its flange, drive and terminal sides. Confirm 415-1804, 24 V, SAE No. 3 mounting, terminal layout and engine 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 basic electric starting motor identity | 415-1804 |
| Same-number Formatting Variant | Search alias only | 4151804 |
| Official Cat Reman Alternative | Remanufactured alternative; not a formatting alias | 20R-4882 |
| Same-number Formatting Variant | Search alias for reman alternative only | 20R4882 |
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
2 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 industrial engines: C9.3 / C9 / C13, Fitment limitation: Confirm 415-1804, 24 V, SAE No. 3 mounting, terminal layout and engine serial range before shipment. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 4151804, 20R4882. Remanufactured references: 20R-4882.
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.
