Transmission belt keeps slipping off!

Eliver1

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May 9, 2025
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I have a gravely ztxl60. My transmission drive belt keeps slipping off as soon as I start the engine. I have replaced the belt, the idler pulley and the extension spring. I have also tightened all bolts. Any other suggestions to fix this problem? I see no cracks in the frame.
 

Tiger Small Engine

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Dec 7, 2022
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I have a gravely ztxl60. My transmission drive belt keeps slipping off as soon as I start the engine. I have replaced the belt, the idler pulley and the extension spring. I have also tightened all bolts. Any other suggestions to fix this problem? I see no cracks in the frame.
Sounds like the belt is too long most likely.
 
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