Question about Craftsman 21 hp 42 in. Deck Yard Tractor - CA Model

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Clutch vibration and jerking at slow speeds.

I have a craftsman 42" riding mower and the clutch pedal started vibrating excessivly. When I slowed down I notice the mower has a jerking motion when driving forward. When the mower is in neutal you can still feel the vibration in the clutch pedal and the vibration stops after enganging the parking brake.

I would appreciate any sugestions that may be problem.

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  • cw_home Jul 30, 2009

    Thanks for everyone's input! This was very helpful.



    I bought a new belt and when I went to change the belt I noticed that the belt had somehow been flipped so it was running inside-out on the pulleys. I flipped the old belt to have the correct side in and it fixed the problem.



    Thanks again for the help!

    Chris

  • cw_home Jul 30, 2009

    Thanks for your input!

    When I looked at the belt I noticed that somehow it got flipped inside-out. I turned the belt with the correct side facing the pulleys.

    This seems to have fixed the problem and I appreciate your help!

    -Chris

  • cncm392
    cncm392 May 11, 2010

    Has a chunk missing in the drive belt.

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  • 376 Answers

Check the drive belt. It probably has chunks missing or at least has flat spots (narrow spots) that cause the belt to jump every time it goes around a pulley. That will set up a heck of a vibration. Also check the pulleys for free movement. The drive belt is above the blade drive belt....

Posted on Jul 29, 2009

  • Barrington Quallo
    Barrington Quallo Oct 24, 2014

    I have experience a similar situation, that prove otherwise. I checked the drive belt and the pulleys however the problem still exist!

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