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Starter Motor for Takeuchi TB125, TB135 & TB145 Excavators | Yanmar 4TN78 / 4TN82 | Y129400-77012

SKU:
Y129400-77012
FitsModel:
TB125, TB135, TB145
ListDescription:
Starter
Takeuchi TB125 TB135 TB145 Yanmar starter Y129400-77012 12V 2kW 15T gear reduction
Part # Y129400-77012

Fits Models At A Glance:

  • Takeuchi Compact Excavators: TB125, TB135, TB145
  • Yanmar Engines: 3TN82E, 4TN78, 4TN82

Key Notes:

  • Part Number: Y129400-77012
  • Interchange: 129400-77010, 129400-77011, 129136-77010, 129136-77011, 121256-77010 (Yanmar)
  • Type: Gear reduction
  • Voltage: 12V
  • Power: 2 kW
  • Rotation: Clockwise (CW)
  • Teeth: 15T
  • Pinion OD: 43.7mm (1.720 in)
  • Mounting Holes: 13.0mm ID unthreaded (x2)
  • Condition: Aftermarket replacement part

Common Use Case or Symptoms: Use when the starter motor fails to crank the engine, produces a clicking noise without engaging, engages but spins without cranking (bendix failure), or draws excessive current on start — a failed starter on applicable Takeuchi Yanmar-powered compact excavators will prevent the machine from starting and can leave operators stranded on the job site.

Why Choose Broken Tractor:

  • ✅ TB125, TB135 & TB145 Confirmed Fitment: Y129400-77012 is the correct 12V 2kW 15-tooth gear reduction starter for the Yanmar 4TN78 and 4TN82 engine family used in the Takeuchi TB125, TB135, and TB145 compact excavator lineup — verify your OEM part number before ordering.
  • ✅ Multiple Interchange Numbers Confirmed: Cross-references to Yanmar 129136-77011 and 121256-77010 families — verify your OEM part number before ordering.
  • ✅ Fast Shipping from a U.S.-Based Team: In-stock and ready to ship from our U.S. warehouses.
$587.15 $188.00
(You save $399.15)

Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.

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Do you need your part quickly? You're in luck! We have warehouses all over the country to ensure a quick and easy delivery time. Most of our parts ship from our warehouses the same day you place your order. And many times, orders are delivered in Two to Three days.

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Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.

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Product: Category: Brand: Head Title: Starter Motor | Broken Tractor | Y129400-77012