Excavator Starter Motors
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354-5671 is Cat's 24-volt electric starting motor for primary-engine applications. The official record publishes a 150-amp rating, an SAE No. 1 nose housing and compatible C7.1 engine and equipment families including 320D2, 320E, 323E/323F, 324E, 326D2/326F, 329E/329F, 330D2/330F and 335F excavators. Cat lists 20R-4877 as the official remanufactured alternative. The manufacturer's pinion fields are presented as ranges, so no single tooth count is claimed for the supplied unit; confirm the pinion and mounting configuration 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 24V electric starting motor | 354-5671 |
| Same-number Formatting Variant | Search alias only | 3545671 |
| Official Cat Reman Alternative | Remanufactured alternative; not a formatting alias | 20R-4877 |
| Same-number Formatting Variant | Search alias for reman alternative only | 20R4877 |
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
5 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 engine family: C7.1, Official Cat excavator families: 320D / 320D2 / 320E / 323D2 / 323E / 323F / 324E, Official Cat excavator families: 326D2 / 326F / 329D2 / 329E / 329F / 330D2 / 330F / 335F, Other official equipment families: 924 / 926 / 930 / 938 / 950 / 962 loaders; D4 / D6K track tractors; PL61 pipelayer, Fitment limitation: Confirm 354-5671, 24 V, SAE No. 1 mounting, pinion configuration and machine serial range. Confirm the complete part number and machine serial range before ordering.
Formatting aliases for the same number: 3545671, 20R4877. Remanufactured references: 20R-4877.
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.
