XZR8®
Yanmar 129612-77230 Alternator Assembly
Yanmar 129612-77230 Alternator Assembly - Image 2
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Yanmar 129612-77230 Alternator Assembly

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Rated Voltage12V
Rated Amperage40A
Pulley TypeV-Belt Single Groove
Pulley Diameter87 mm
Fan TypeInternal
PolarityNegative Ground
Mounting StyleHinge Mount
Weight5.5 kg
Overall Length175 mm
Overall Width135 mm
Overall Height180 mm
Package Dimensions43.2 × 30.5 × 25.4 cm

Manufacturer No.

  • 129612-77230
  • 119836-77201
  • LR140-714B
  • 119836772003
  • YM12961277230

OEM Part No.

  • 600-821-5540
  • RYM12961277230
  • 129612-77230
  • AM878581
  • 12961277230

Engine Part No.

  • Yanmar 3D82
  • Yanmar 4D88E
  • Yanmar S3D84
  • Yanmar 4D94E
  • Yanmar 3TN84
  • Yanmar 4TNE84
  • Yanmar 3TNE88
  • Yanmar 3TN100L

Interchange No.

  • AYA-100
  • 002-Y100
  • 90-25-1095
  • YM12993077212
  • 129930-77212
  • YM11983677200
  • 119836-77200
  • LRA01950

Fitment Vehicles

  • Komatsu SK820-5
  • Komatsu SK714-5
  • Komatsu SK815-5
  • Komatsu SK818-5
  • Atlas Copco QAS18
  • Daewoo DSL801
  • John Deere 3012 Series
  • John Deere 3015 Series
  • John Deere 4020 Series
The Yanmar 129612-77230 is a 12 Volt, 40 Amp alternator designed for Yanmar industrial diesel engines including 3D82, 4D88E, S3D84, and 4D94E series. It utilizes an internal cooling fan and a single-groove V-belt pulley with 87 mm diameter. Negative ground polarity. Direct replacement for Komatsu OEM 600-821-5540 and RYM12961277230 used in SK820-5, SK714-5, SK815-5, and SK818-5 skid steer loaders. Cross-references Hitachi LR140-714B and Yanmar 119836-77201.

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