scag belt problem

Discussion in 'Mechanic and Repair' started by Steppenwolf, Oct 18, 2005.

  1. Steppenwolf

    Steppenwolf LawnSite Senior Member
    Messages: 403

    Tried search and didn't find answer.
    Ok I have three Scag 52" hydro wb's non advantage decks,#1 3513 hrs,#2 3886 hrs and#3 4022 hrs. The problem is all of a sudden we have been going thru engine to blade belts(30 hrs to 100 hrs) vs our average 250 hrs. We have been using Rotary and Dealers Choice kevelar belts and have had excelent service till the last 12 months. I have had the units to the dealer to check my tension on the belts which is always just slighty on the loose side(by gauge),all original spindels and pulleys and all are free to spin. He doesn't know( he is a good dealer in my opinion). He has my last 8 belts that discentergrated or broke and is waiting for the belt rep to have a look see at the belts.They show no signs of slippage or smell like haven been hot. Not one problem with the blade to blade belts, they last forever.
    I will not use Scag belts so don't suggest, they just schread and foul the clutch,fun to clean out on a hot unit in a yard.
    Thanks for any kind of input.
  2. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Messages: 3,526

    Is there a chance that the pulley has alot of wear and causing alot of wear on the belts?., maybe the pulley is worn and the belt is riding to deep and actually just gripping the edge of the belt?
  3. Steppenwolf

    Steppenwolf LawnSite Senior Member
    Messages: 403

    Grass cuttin,
    That is what I am thinking but my dealer thinks they look all right,but they are high hour machines and original pulleys. They run everyday flawlessly except for the belts. I have been thinking about replacing the center and left pulleys to see what happens.Thanks for the input because that is the way I was leaning towards.
  4. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,555

    I noticed on my Scag Cougar that one of the bearing on the idler wore some and allowed the idler to tilt. I replaced the bearing to square it up. I could see that the idler was directing the belt into one side of the first spindle pulley, which can't be good.
  5. easycareacres

    easycareacres LawnSite Senior Member
    Messages: 367

    check if belt is even centre on idler, if not dissasemble blet and remove arm tensioner. X2 Bearings need replacment. Tight fit to replace but stops belt flack etc.

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