View Full Version : why does older viper deck shake so violently as to break belts
07-06-2006, 09:58 AM
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?
07-06-2006, 10:03 AM
bent or broken blade?
07-06-2006, 10:16 AM
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.
07-06-2006, 01:28 PM
Needs more tension on the belts...
07-06-2006, 02:28 PM
could be a piece of a stick wedged in one of the pulleys. Its happened to me.
07-06-2006, 07:57 PM
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.
07-06-2006, 10:00 PM
I dont know our Viper never gave us a problem, odd.
07-06-2006, 10:46 PM
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.
Envy Lawn Service
07-07-2006, 01:57 AM
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?
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?
07-31-2006, 07:59 AM
Looking for a used Lesco Z turn, if you've got one you can't stand anymore let me know. firstname.lastname@example.org
08-03-2006, 03:58 PM
i had one shaking real bad last week and i know this sounds lame but the idle was set really low raised it and it stoped the guy that owned it didnt notice that it was at an idle only
06-27-2007, 09:59 PM
ready to let it go cheap
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