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Burning PTO deck belt.

Discussion in 'Mechanic and Repair' started by Banksy, Mar 30, 2013.

  1. Banksy

    Banksy LawnSite Member
    Posts: 190

    I just put a new PTO deck belt on my Bobcat. When I disengage the blades, they stop. The blade brake is right on and works well. However, the engine to deck belt (PTO) chirps and burns. I've adjusted it to no end and it just won't stop doing it. It's the correct belt. Any advise?
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  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Is this a factory (OEM) replacement belt per your unit model and serial number ?
     
  3. Banksy

    Banksy LawnSite Member
    Posts: 190

    Yes. Bought from a Bobcat dealer using model and serial number of mower.
    Posted via Mobile Device
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Look at the inside (V groove) of the engine/deck drive pulley and make sure there's no film of rubber from the old belt present on the faces, This will cause the new belt to grab. If you find nothing post the model and serial numbers.....
     
  5. chesterlawn

    chesterlawn LawnSite Senior Member
    Posts: 703

    Make sure you have the belt on the right side of the belt guides if any.
     
  6. Banksy

    Banksy LawnSite Member
    Posts: 190

    Belt is within the two belt guides. I'll get the model number off it tomorrow. The pulley is pretty clean. I even adjusted the tensioner all the down to make it as slack as possible when in the "disengaged" position and it still wants to grab the belt.
     
  7. Isenberg Lawn Care

    Isenberg Lawn Care LawnSite Member
    Posts: 61

    Possible dealer gave you incorrect part.
    Posted via Mobile Device
     
  8. Banksy

    Banksy LawnSite Member
    Posts: 190

    Maybe, but the belt that it replaced was from Agri Supply. I simply measured the old broken one and bought one from AS just using that measurement. That one did it too, but it got me through the rest of last season. I went to the dealer to get the right one figuring that would fix it, but it didn't and the two are nearly identical in length.
     
  9. pugs

    pugs LawnSite Gold Member
    Posts: 3,018

    Do you have your owners manual? There is a whole procedure for adjusting everything on the old ones where you engage the blades with a lever. Sounds like you may need to adjust the belt guides and possibly some of the other adjustments.
     
  10. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Banksy,



    I asked this question for a reason, And now we'll see why.....



    After reading the above I did some look'n around without your model number, I found ALL walkbehind 48" decks both floating and fixed require the same belt.

    Now, The fact that you bought belts by measuring length doesn't mean your getting the correct belt. Even going to your dealer doesn't mean he sold you the correct belt, Dealers can't stock every OEM belt so they stock cheaper aftermarket belts, Most have a full wall in increments by the inch since standard generic belts only come that size unless it's a OEM "replacement" belt which will be the exact length and make up as the OEM.


    Here's where I believe your issue lies;

    The aftermarket belts you've bought are wrapped belts as that's standard unless it's labeled as OEM "replacement".....

    Wrapped belt;

    [​IMG]


    Your machine requires a raw edge belt;

    [​IMG]


    Installing a wrapped belt in place of a raw edge belt or vise-versa can cause the issue your having, I've seen it first hand many times.....

    The OEM belt you need for your machine is part # 2722160, It's also available in a aftermarket "OEM replacement", It's 5/8"x 73 3/8" long and is raw edged..... Once this belt is installed engage the deck with engine off and adjust the two flat bar belt guides under the engine, The flat part of the guide should be parallel with the belt and 1/8 to 3/16" from touching the belt.

    With this done your belt chirp'n/skip'n/flop'n issue should be history......
     

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