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Drive belt failure

Discussion in 'Hustler Turf Equip (Archived)' started by atractorshop, Jul 8, 2009.

  1. atractorshop

    atractorshop LawnSite Member
    Posts: 4

    I have a customer with a new Super Z 31hp kaw 60" purchased in March of this year. At 22 hrs the drive belt broke and we replace the belt and looked for a cause and could not find one. At 52 hrs the belt broke again, at this time the customer thought it may have been the mowing conditions he was in that time. The 3rd belt was today at 163 hrs. I cannot find anything on the machine that is wrong. Any suggestions or problems with this particular machine? We have sold well over 200 machines and rarely have a drive belt break.
  2. mowerconsultant

    mowerconsultant LawnSite Fanatic
    Male, from Syracuse, NY
    Posts: 9,761

    Have you talked to your regional service manager?
  3. atractorshop

    atractorshop LawnSite Member
    Posts: 4

    yes, he has not heard of anyone else having these problems,
  4. okievarmint

    okievarmint LawnSite Member
    Posts: 30

    I know you've already checked the obvious, but make sure the pump tensioner arm is not bent. Have seen a few with this problem; straightening usually fixes it.
  5. Mickhippy

    Mickhippy LawnSite Platinum Member
    Posts: 4,251

    Is he mowing over sticks? I dont know how many belts Ive gone through, and it was almost always because of sticks!
  6. atractorshop

    atractorshop LawnSite Member
    Posts: 4

    I have checked the tensioner alignment and it is good. As far as mowing over sticks, I can see one of the broken belts to be because of that. That belt was shredded. The other belts broke like you cut them with a knife. No damage to the belt other than the spot where it was pulled apart.
  7. okievarmint

    okievarmint LawnSite Member
    Posts: 30

    A belt that is broken like it has been cut, just about has to be the belt being cut by a pulley when the belt jumps off. As said, foriegn material could be making the belt come off, or belt angularity is not correct.
  8. 3Bladz

    3Bladz LawnSite Member
    from IL
    Posts: 168

    If there was a stick in the pully it should be vibrating or something. Are you using aftermarket belts?
  9. Mickhippy

    Mickhippy LawnSite Platinum Member
    Posts: 4,251

    Not necessarily. It happens so fast sometimes they just stop working! Ive had sticks take off the drive belt, that drive belt has fallen onto the deck belt and Ive had to replace both belts at the same time. Now thats a PITA!

    You may get vibrations if there is a stone, mud or a tiny piece of wood in the pulley but he didnt mention anything about vibrations! Although it may be worth while checking all pulleys again.
  10. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Posts: 4,231

    Tell the owner the next time it breaks that you will go out and replace the belt for him onsite. At that time you will see the brush and small sapplings he is mowing over.

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