Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Official Cat starter reference | 390-0788 |
Excavator Starter Motors
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390-0788 is documented by Cat as a 24V 7.5kW electric starter with a nine-tooth pinion, clockwise rotation, case ground and IP55 rating. Manufacturer-listed applications include C9, C13, C15 and C18 generator/industrial families plus selected motor graders and generator sets. Confirm the complete number, pinion pitch, flange, terminal/ground arrangement, engine arrangement and equipment 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 Manufacturer Part Number | Official Cat starter reference | 390-0788 |
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 Engine families: Cat C9 / C13 / C15 / C18 generator and industrial contexts, Representative equipment: Cat generator sets and 14/140/150/160 graders, Fitment limitation: Confirm number, pinion pitch, flange, terminals, arrangement and serial. Confirm the complete part number and machine serial range before ordering.
No alternate number is listed for 390-0788. Send the original nameplate for an alternate-number check.
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.