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Straggler issue on a 52" bobcat

Discussion in 'Mechanic and Repair' started by Lynden-Jeff, Jun 1, 2007.

  1. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Posts: 1,405

    Hey,

    Over the last few weeks ive noticed a row of straglers roughly right in the middle of the discharge chute side blade. I thought it was the blades, so I replaced them and it was fine for about a day and it started again. The blades are fairly sharp still so I don't think thats the problem. What else could it be? The engine may be reving a little slower but I don't think its to far off from normal. The deck is also very clean. Does anyone have any suggestions?

    Thanks
    Jeff
     
  2. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    I don't know the model you are referring to so I can only guess that this unit has a 2nd belt that runs from the center spindle to the discharge(like most walk behind units) and that belt may be loose and giving you a slower blade tip speed.
     
  3. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Posts: 1,405

    Hey,

    Sorry its a 52" ZT-219 rider. I believe it is 1 belt that drives all blades but I can't remember (have not had it that long) and it does have a tensioner. Some one was telling me if the belts stretch it can alter performance but with a tensioner I don't see why it would matter.

    Thanks
    Jeff
     
  4. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    Well the nice thing about tensioners is that you do not have to keep tightening the belt , but at some point the belt will stretch so much that you will need to replace it.

    How old is this belt, or how many hours are on it?
     
  5. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Posts: 1,405

    Hey,

    It would have about 130 hours on it. I would imagine they last longer then that?

    Cheers
     
  6. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    Since this unit is so new the only other thing I could say to check is the pitch on the deck. Make sure that you are not perfectly level on the front blade tip in the front and the rear, you always want 1/4 difference higher in the rear of the deck then the front.
     
  7. pugs

    pugs LawnSite Gold Member
    Posts: 3,018

    Actually I think the Bobcat manual calls for 1/8".

    I would check the belt and also pull the belt off and check that spindle to make sure it is spinning nice and free. And also check the level/pitch of the deck just in case something came loose.

    I honestly dont know what to tell you since that is kinda an odd problem. You would think it was just a dull blade or something.
     
  8. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Posts: 1,405

    Hey,

    I took it in to my dealer today. Everything seemed fine except the deck pitch was off. They set it 1/4 higher at the FRONT. Why do you guys say the rear? They said it should always be higher in the front so that the blade is cutting the grass twice, high at the front of the blade and at the correct height on the rear. Seems to make sense to me but I have also heard the "you always want the deck pitched forward". Can some one elaborate?

    Cheers
    Jeff
     
  9. pugs

    pugs LawnSite Gold Member
    Posts: 3,018

    Pitched forward is how any mower deck should be as far as I know. And just look in your Bobcat manual...it will say the same thing.

    Dont like to bash other dealers but I would say yours has no clue what they are talking about.
     
  10. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Posts: 1,405

    You know I have had more arguments in the last few days about this then anything that I can remember. Many people on here and the manual say forward however every guy at my dealer says to pitch the front up and so does my partner, along with another colleague who have both been cutting for much longer then me. It seems to be cutting great as far as I can see so I don't really have any reason to change it however I'm going to give it a week in the field, if it cuts crap then I will re pitch front down.

    Cheers
    Jeff
     

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