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  1. #1

    Join Date
    Mar 2002
    Posts
    26
    Location
    Meredith NH
    Tractor
    New Holland 1725

    Default Keyed P.T.O.

    Where I have my 3pt blower stored for the summer is under cover, however the end of the P.T.O. shaft is hanging out from under the roof. I figured an easy fix would be to just remove it from the blower. I removed what I'm assuming is a shear bolt, loosed the set screw and it wouldn't budge. After further inspection I see it's keyed to the shaft of the blower. I ended up re-assembling everything for the time being, but my question is why is there a key AND a shear bolt? Won't the key defeat the purpose of the bolt? I say this is a shear bolt because this is the bolt my dealer looked at reference when I told him I had taken it out. The one I broke was up near the tractor P.T.O. shaft. The P.T.O. is a Comer, from Italy. Thanks.

  2. #2
    Platinum Member
    Join Date
    May 2001
    Posts
    918
    Location
    QC, Canada
    Tractor
    B7500HSD

    Default Re: Keyed P.T.O.

    I think the shaft to the blower may be configured to accept different kinds of PTO shafts. Just because there is a key in the shaft doesn't mean that it is being used.

    I just mentioned in another recent post that I used to swap the PTO shaft between my tiller and blower. It's no fun. I suppsoe it is possible that there is a puller that you can use. I just proceeded by gently tapping the PTO shaft off with a wooden mallet, a little on each side. There was a tendancy for the shaft to go crooked, so I used a pry bar on one side while tapping the other. The pry bar slipped and I ended up damaging the oil seal on the gear box.

    Ideally, I would leave the PTO shaft in place. Make sure it is hanging down from the gear box and cover the end. You could also slip it apart and store the "tractor side" somewhere else - again letting the attached end hang down (but off the ground) and covering it.

  3. #3
    Veteran Member
    Join Date
    Jan 2002
    Posts
    1,487
    Location
    Lancaster PA
    Tractor
    Yanmar 186D

    Default Re: Keyed P.T.O.

    If there is a key on the implement input shaft then the bolt there is not working as a shear bolt. There are different kinds of set ups for shear bolts. Sometimes there are flanges on the implement end of the PTO shaft with a shear bolt holding the flanges together. There ought to be some kind of system to prevent damage to the tractor should the implement stop suddenly.

    Chris

  4. #4

    Join Date
    Mar 2002
    Posts
    26
    Location
    Meredith NH
    Tractor
    New Holland 1725

    Default Re: Keyed P.T.O.

    pbenven, that is exactly what I did, slid off the tractor side and protected the dangling implement side.

    pennwalk, that is my set-up with the flanges up near the tractor P.T.O.

    Thanks.

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