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  • pto drive shaft to winch drive

    From zane 79 landcruiser long body@21:1/5 to All on Thu Jun 9 14:18:02 2016
    i am having problems with an old koenig 100. the bolt securing the drive shaft to the winch came off and the small shim which pits into the winch input shaft was lost (Alan bolt). I made a new shim out of old spring and it fits perfectly, however the 3/8 inset hex head bolt is not providing enough
    pressure and the winch still fails under a heavy load. I tried drilling a bit into that shim and also ground the bolt to fit into the depression and got a fair pull before the winch again failed. the rotation is starting to score the input shaft.

    I appreciate any ideas....any one ever just drill through the input shaft so the securing bolt fully penetrates the drive shaft.? I am amazed with the strength of the winch when operating normally and it is crazy that there is only a pressure hold and not a bolt all the way through the shaft....thanks
    for any ideas....

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  • From Budd Cochran@21:1/5 to All on Thu Jun 9 22:30:36 2016
    I'm not familiar with your specific winch, but I've come across other
    systems using a similar drive set up.

    The design has a purpose: to keep the winch from being overloaded ... a slip clutch setup, as it were, for your safety.

    I would suggest having the bolt hole drilled and tapped to the next larger thread size in a fine pitch (7/16" S.A.E. fine thread) and use that size
    Allen head ( your "inset hex head") or a Grade 8 Aircraft grade bolt.

    Do not let anyone sell you a stainless steel bolt as they will gall and
    stick in the threaded hole without anti-sieze and that would mean drilling
    and tapping out for an even larger bolt.

    Hope this healps.

    Budd
    "zane 79 landcruiser long body" <[email protected]> wrote in message news:b3cf3$57597a9a$41b57997$[email protected]...
    i am having problems with an old koenig 100. the bolt securing the drive >shaft
    to the winch came off and the small shim which pits into the winch input shaft
    was lost (Alan bolt). I made a new shim out of old spring and it fits perfectly, however the 3/8 inset hex head bolt is not providing enough pressure and the winch still fails under a heavy load. I tried drilling a
    bit
    into that shim and also ground the bolt to fit into the depression and got
    a
    fair pull before the winch again failed. the rotation is starting to score the
    input shaft.
    I appreciate any ideas....any one ever just drill through the input shaft
    so
    the securing bolt fully penetrates the drive shaft.? I am amazed with the strength of the winch when operating normally and it is crazy that there
    is
    only a pressure hold and not a bolt all the way through the
    shaft....thanks
    for any ideas....

    --
    posted from http://www.motorsforum.com/jeep/pto-drive-shaft-to-winch-drive-134992-.htm using MotorsForum's Web, Mobile and Social Media Interface to rec.autos.makers.jeep+willys and other automotive groups




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  • From J. Clarke@21:1/5 to All on Sat Jun 11 05:40:50 2016
    In article <b3cf3$57597a9a$41b57997$[email protected]>, [email protected] says...

    i am having problems with an old koenig 100. the bolt securing the drive shaft
    to the winch came off and the small shim which pits into the winch input shaft
    was lost (Alan bolt). I made a new shim out of old spring and it fits perfectly, however the 3/8 inset hex head bolt is not providing enough pressure and the winch still fails under a heavy load. I tried drilling a bit into that shim and also ground the bolt to fit into the depression and got a fair pull before the winch again failed. the rotation is starting to score the
    input shaft.

    I appreciate any ideas....any one ever just drill through the input shaft so the securing bolt fully penetrates the drive shaft.? I am amazed with the strength of the winch when operating normally and it is crazy that there is only a pressure hold and not a bolt all the way through the shaft....thanks for any ideas....

    I believe that that part is a key, not a shim, and there should be a
    matching groove on the mating part.

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  • From zane 79 landcruiser long body@21:1/5 to All on Sat Jun 11 13:18:01 2016
    replying to Budd Cochran, zane 79 landcruiser long body wrote:
    thanks budd, got a good pull earlier, dragging a coconut tree out of the creek at my place here on the west coast of sumatra....i run a surf camp here....our motto is to protect and surf.....or surf and rescue when the beast, my 79 cruiser, is in a good mood. having the winch is essential i have pulled a lot of small truck out of dangerous situations.....btw I just ground down the 3/8 inch bolt to a flat face, my idea of drilling a small divot into the shim and tapering the end of the bolt was a bad idea. your suggestion helped me solve the problem.....thanks again....take care, zane

    --
    posted from http://www.motorsforum.com/jeep/re-pto-drive-shaft-to-winch-drive-134993-.htm

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  • From Budd Cochran@21:1/5 to All on Sat Jun 11 21:53:46 2016
    "zane 79 landcruiser long body" <[email protected]> wrote in message news:edeb1$575c0f89$41b57997$[email protected]...
    replying to Budd Cochran, zane 79 landcruiser long body wrote:
    thanks budd, got a good pull earlier, dragging a coconut tree out of the creek
    at my place here on the west coast of sumatra....i run a surf camp here....our
    motto is to protect and surf.....or surf and rescue when the beast, my 79 cruiser, is in a good mood. having the winch is essential i have pulled a
    lot
    of small truck out of dangerous situations.....btw I just ground down the
    3/8
    inch bolt to a flat face, my idea of drilling a small divot into the shim
    and
    tapering the end of the bolt was a bad idea. your suggestion helped me
    solve
    the problem.....thanks again....take care, zane

    --
    posted from http://www.motorsforum.com/jeep/re-pto-drive-shaft-to-winch-drive-134993-.htm


    Glad to help.

    I was a heavy equipment mechanic and journeyman millwright for ten years in
    an automotive muffler factory here in the States but I also served with the Indiana National Guard Combat Engineers in the 1970's.

    US Army 6X6 trucks used a similar overload unit on some winches and I remembered how were set up.

    Surf Safe!!!!

    Budd



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