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Excavator Alternators
Denso-pattern alternator identified by Yanmar number 129423-77200 and Denso number 101211-1170. Technical and application references record 12V, 40A, clockwise rotation and an integrated regulator for Yanmar 3TNV82, 3TNV88 and 4TNE84 engine applications, including selected John Deere, Volvo, Case and compact-equipment installations. Confirm the pulley, connector and machine serial range before ordering.
Fitment status: Verified · Checked 2026-07-27Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Yanmar equipment number | 129423-77200 |
| Manufacturer Part Number | Denso manufacturer number | 101211-1170 |
| Equipment Manufacturer Number | John Deere equipment number | AM879908 |
| Equipment Manufacturer Number | John Deere equipment number | LVA12357 |
| Equipment Manufacturer Number | John Deere equipment number | TY25243 |
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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 Engine family: Yanmar 3TNV82, 3TNV82A and 3TNV88, Engine family: Yanmar 3TNV70, 3TNV76 and 4TNE84, Machine application: Selected John Deere 27D, 110 TLB and Volvo EC27C equipment, Fitment limitation: Confirm pulley, connector, mounting and machine serial range. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: 101211-1170, AM879908, LVA12357, TY25243.
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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