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Excavator Alternators
Heavy-duty charging alternator identified by Cat number 197-8820. The official record specifies 24 volts and 95 amps and supports C7, C9, C11, C13, C15, C18, C27, C32 and other Cat engine families across excavators, dozers, loaders, graders, generator sets and industrial equipment. Confirm the complete number, SAE J180 mount, pulley, terminals, regulator and machine serial range.
Fitment status: Verified · Checked 2026-07-29Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Equipment Part Number | Cat charging-alternator number | 197-8820 |
| Same-number Formatting Variant | Compact Cat formatting | 1978820 |
| Manufacturer Reman Number | Cataloged Cat Reman replacement | 10R-9789 |
| Manufacturer Reman Number | Cataloged Cat Reman replacement | 10R-9790 |
| Manufacturer Former / Reman Number | Cataloged Cat reference | 0R-4841 |
| Manufacturer Alternator Number | Cataloged Denso reference | 101211-8311 |
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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
4 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 Cataloged engine families: Cat C7 / C9 / C11 / C13 / C15 / C18 / C27 / C32, Excavator examples: Cat 320D / 330D / 336D / 345B / 365C / 374D / 385B, Dozer and loader examples: Cat D6T / D7R / D8T / D9T / 924G / 980H / 988H, Fitment limitation: Confirm 197-8820, 24V 95A, mount, pulley, terminals and serial range. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: 10R-9789, 10R-9790, 0R-4841, 101211-8311. Formatting aliases for the same number: 1978820.
Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.
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