Scag 48" belt driven jackshaft

Discussion in 'Mechanic and Repair' started by apache, Aug 22, 2012.

  1. apache

    apache LawnSite Member
    from md
    Posts: 23

    I have a older 48 Scag bd walkbehind & had the jackshaft pulley rubbing against the spring. I thought the key in the pulley was loose so I tighten it...which did nothing. For some reason the jackshaft keeps sliding over pushing the jackshaft pulley into the chain, scraping the chain, belt, etc. Question is how to fix it or what wrong?

    I took it apart but not sure if anything is broken. There is a groove that a bearing seems like it should fit in but when I snap it in the teeth from the bearing shows at the other end by the coupler nut not allowing it to butt closely.

    There is also next to the bearing a metal sleeve that moves freely...not sure if it is supposed to move. I was going to jb weld it until I can get another shaft to see if that prevents the shaft from sliding over.:confused:

    Any repair suggestions would be greatly appreciated?

    Thanks
     
  2. apache

    apache LawnSite Member
    from md
    Posts: 23

    After doing some research it seem like there should be a 5/8" retainer clip? but not sure how or we it clips into?

    Any one has any input on this?

    Thanks
     
  3. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Clean the snapring groove...
    Remove the pulley guard and pull the shaft assy out of the transmission coupler
    Slip the new snapring onto the shaft and slide it all back together..
    Position the snapring in the groove...reassemble..
    Posted via Mobile Device
     
  4. apache

    apache LawnSite Member
    from md
    Posts: 23

    So from the transmission:
    transmission gear spline, coupler (that just slides on/off) then the jack shaft (the jack shaft has the circlip, jackshaft bearing, spacer, a collar. Then place the belt on.

    I just don't understand what will keep the jackshaft from sliding out like it's been doing. I will reassemble everything & try.
     
  5. apache

    apache LawnSite Member
    from md
    Posts: 23

    Ok, thanks that seemed to do the trick.

    Now I have to figure out why it will mover in gear then stop & starts moving when I push it?
     

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