Excavator Starter Motors
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272-4774 is identified by Cat as an electric starting motor assembly for a broad family of hydraulic excavators, including 311C/311D, 312C/312D, 313D, 314C/314D, 315D, 318C/318D, 319C/319D, 320B/320C/320D, 321C/321D and 323D variants. Cat lists 10R-7586 as the official remanufactured alternative. The current 272-4774 manufacturer page does not publish voltage, power or tooth count for the new assembly, so those legacy values are intentionally not claimed here. Confirm the complete number, flange, 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 electric starting motor assembly | 272-4774 |
| Same-number Formatting Variant | Search alias only | 2724774 |
| Official Cat Reman Alternative | Remanufactured alternative; not a formatting alias | 10R-7586 |
| Same-number Formatting Variant | Search alias for reman alternative only | 10R7586 |
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 excavator families: 311C / 311D / 312C / 312D / 313D / 314C / 314D / 315D, Official Cat excavator families: 318C / 318D / 319C / 319D / 320B / 320C / 320D / 321C / 321D / 323D, Fitment limitation: Confirm 272-4774, flange, 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: 2724774, 10R7586. Remanufactured references: 10R-7586.
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.
