Excavator Alternators
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8600721 identifies a 24-volt, 60-amp 36SI brushless alternator with J180 hinge mounting, 1/4-inch B+ output, R pin, no I terminal, remote sense and insulated ground. The official 24-volt off-highway cross-reference guide maps 1117826, 8600400, 333-1184 and 4N-3986 to this replacement. Confirm the original number, insulated-ground electrical system, J180 mounting and terminal 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 Manufacturer Part Number | Official active new-service number | 8600721 |
| Published Replacement References | Official 24V off-highway cross-reference mappings | 1117826 / 8600400 / 333-1184 / 4N-3986 |
| Higher-Output Option | 24V 105A option; not a direct interchange without system review | 8600496 |
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 Published Off-Highway References: 1117826 / 8600400 / 333-1184 / 4N-3986, Electrical System: 24V insulated-ground off-highway equipment, Fitment Limitation: Confirm original reference, 24V/60A, insulated ground, J180 mounting and terminals. Confirm the complete part number and machine serial range before ordering.
No alternate number is listed for 8600721. Send the original nameplate for an alternate-number check.
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.
