why does older viper deck shake so violently as to break belts

Discussion in 'Mechanic and Repair' started by mike micklich, Jul 6, 2006.

  1. mike micklich

    mike micklich LawnSite Member
    Messages: 14

    any clues it has 700 hours on it i got it for free as a donation to cemetert i maintain. I know why it was free but can't figure why it shakes so spindles spin well all grease som play in deck hangers is it geometry? crap engineering? something simple?
  2. lawnwizards

    lawnwizards LawnSite Silver Member
    Messages: 2,439

    bent or broken blade?
  3. Runner

    Runner LawnSite Fanatic
    Messages: 13,497

    That, or a bent spindle. It is possible that it is so out of sync that it reaches a frequency that throws it that much out. Just think of a washing machine that when it goes on the spin cycle, it it starts tipping or scooting. At slower speeds, it may be just fine...smooth as can be; but at higher speeds, it goes out of wack. Think of a cieling fan...it's the same thing.
  4. lawnmaniac883

    lawnmaniac883 LawnSite Silver Member
    Messages: 2,613

    Needs more tension on the belts...
  5. barnard

    barnard LawnSite Senior Member
    Messages: 618

    could be a piece of a stick wedged in one of the pulleys. Its happened to me.
  6. horticulturedawg

    horticulturedawg LawnSite Member
    Messages: 59

    I had a viper...hit a very short post hidden in the grass, mower stopped and I went tumbling over the front. After that, the deck shook like crazy, breaking belts almost daily. I warped the frame and ruined the unit. Sold it not too long ago to a guy to use for clean up jobs. It didn't do anything to the deck but you could tell where it bent the frame. That machine wasn't very reliable to start with...always broken...engine, broken belts, uneven cut, you name it. I have three lesco machines...one 36", and one 48" wb. Didn't realize how poor the quality was till I got an exmark.
  7. Turf Technologies

    Turf Technologies LawnSite Senior Member
    from Florida
    Messages: 587

    I dont know our Viper never gave us a problem, odd.
  8. Jpocket

    Jpocket LawnSite Silver Member
    Messages: 2,281

    I have a VIPER, we only use it for Fall C/U cuz it has a PECO vac, as a high volume mower it is a piece of crap. Although it is a good back up and will get you finished for the week if need be.
  9. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087

    I wish you were near me. I'd have you drop it off one weekend and go over it for you.
    You are certainly out of whack. Probably more than one thing, maybe even more than two.

    Anyways, go out and push your deck sideways while suspended.
    Have side to side shift?
    >>>> Replace bushings in front deck A-arms
    >>>> Possibly those pillow block bushings

    Check the load bearing tension on all four lift links.
    Have some that aren't supporting much weight?
    >>>> Adjust

    Check belt routing, look in the pulley grooves, check for spindle bearing play.

    Which belt are you loosing?
    PTO to deck?
    >>>> There is a fix kit
    OR Spindle belt?

    MR HYDROSEED LawnSite Member
    Messages: 48

    Looking for a used Lesco Z turn, if you've got one you can't stand anymore let me know. mrhydroseed@yahoo.com

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