how to make pto shaft stop sticking

Discussion in 'Homesteading Questions' started by Paul Wheaton, Aug 30, 2004.

  1. Paul Wheaton

    Paul Wheaton Well-Known Member

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    The pto shaft on my bush hog sticks a lot and is getting to be a nuisance. I've tried lots of grease and working it in and out. Still sticks.

    Could it be slightly bent? And the only solution to be to replace it?
     
  2. uncle Will in In.

    uncle Will in In. Well-Known Member Supporter

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    Is the drive shaft sticking or is it the saftey shield around the outside of the shaft? If the shield gets a little ding in it it can be a bear to slide in and out. Usualy if the drive shaft is bent it wlll put it out of balance and shake everything when it gets to turning fast.
     

  3. Paul Wheaton

    Paul Wheaton Well-Known Member

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    I'm pretty sure that the sleeve is not the problem.

    Often, when I try to lower the bush hog, it stops about a foot off the ground because the pto shaft is sticking. I'll have to bounce it a bit, or get off and stand on it to get it to go the rest of the way down. I think the plastic sleever would not be able to hold things up like that. I think it has to be the steel PTO shaft.

    It doesn't look bent. But it doesn't look rusty either. It just sticks. Frequently. Not sure what else to do.
     
  4. Tractorman

    Tractorman Well-Known Member

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    Sounds like the shaft is to short and is binding when you lower it.
     
  5. moopups

    moopups In Remembrance

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    Take it apart and check for bends by placeing it next to a straight edge, the insert piece. Small dings can be removed by putting it in a vice and drawing a file lenghtwise placed crosswise on the shaft with major pressure. Check that the 3 point isn't the problem, does it lift and drop everything else?
     
  6. HermitJohn

    HermitJohn Well-Known Member

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    I'll bet its twisted a bit, making things bit difficult to slide. I would doubt you can make it better. Might pull it apart and go at it fast and furious with wire brush on angle grinder. Polish it real good then grease it again. It may help a little, but probably not.
     
  7. uncle Will in In.

    uncle Will in In. Well-Known Member Supporter

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    Paul, when it is unhooked from the tractor, is it still really hard to pull apart and slide back together??? If not the problem could be in the hydraulic cylinder that is working your 3pt arms. I had an 8n Ford that got the cylinder jimmied up inside from tools jaming up and down on the 3pt.
     
  8. Ross

    Ross Moderator Staff Member Supporter

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    Metric or square shaft PTO? I'm wondering if you've managed to mis-align a metric shaft because if so it would bind terribly.
     
  9. Paul Wheaton

    Paul Wheaton Well-Known Member

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    When the tractor is not connected it has super sticky spots. So sticky that we cannot manually move it.

    The shaft in not square - it's sort of triangular. And there is one edge slightly different from the other two to make sure it goes together right.
     
  10. Farmer Brown

    Farmer Brown Well-Known Member

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    I have had the rectangular ones get worn and try to turn inside the hole to the point it would stick. I bought a new "slip sleeve" I think it's called and replaced that and worked fine. Was on JD baler. It would hang up and not slip in and out on a turn. FB
     
  11. agmantoo

    agmantoo agmantoo Supporter

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    Paul, when manually moving the pto shaft in and out it must operate freely. Take the male part of the shaft completely out, thoroughly grease the male shaft and slowly re-insert it into the female while visually attempting to determine why it is binding. All burrs, bends and twists that prevent the unit to sliding together must be corrected, then you will be good to go.
     
  12. Ross

    Ross Moderator Staff Member Supporter

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    Those shafts are somewhat prone to twisting, if you're sure you have correctly aligned then you might have to replace the tubes.
     
  13. moopups

    moopups In Remembrance

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    The 'super sticky spots' is a dead give away that its the hydraulic lift system, not the pto shaft, confirm by examining the shaft off the tractor - does it bind now? If not, you need to go to the hyrdaulics to find the problem.