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  1. #1
    Elite Member woodlandfarms's Avatar
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    Jul 2006
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    4,261
    Location
    Los Angeles / SW Washington
    Tractor
    PowerTrac 1850

    Default Bolt Broken

    OK, I am getting desperate.

    A bolt on my mower broke off rather low in the hole. I have been able to work it up to the surface but now it is completely jammed.

    I have lubed it, waxed it, hit it with a torch, Tried to use an extractor, and have been using the old school method of hammer and punch and working it around.

    I am concerned that all I have left is welding a bolt on and I am not much of a welder and this is quite flush.

    Looking for ideas I have not thought of.

    The bolt is 5/8" btw..

    Carl
    Power-Trac 1850, grapple, hoe, 90" mower, 72" box blade

  2. #2
    Platinum Member firemanpat2910's Avatar
    Join Date
    Feb 2006
    Posts
    901
    Location
    Havana Fla
    Tractor
    Ford 2910II

    Default Re: Bolt Broken

    Is it a blind hole or can you get to it from either way? If you can drill it from the other side it might push itself right out. 5/8 is pretty good sized. I have drilled holes in broken bolts then hammered an old torx bit deep into it then used the screw it in and out a little more each time method or the quick hand impact tool, witch keeps bit hammered in and spins it at the same time. Good luck, theres a great feeling when that bolt finaly gives up.

  3. #3
    Bronze Member
    Join Date
    Jan 2008
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    64
    Location
    Maine

    Default Re: Bolt Broken

    Take a 6011 rod and weld a tip on the end of you bolt and vice grips will take it right out. this works on bolts that are rusted in also. If the tip breaks off weld a gain till it's out, I'v done this on dozer's a lot.
    Brian

  4. #4
    Gold Member davkir's Avatar
    Join Date
    Sep 2005
    Posts
    365
    Location
    Hendricks Co., In
    Tractor
    JD 2305 W/CC & R4

    Default Re: Bolt Broken

    Have you tried grinding a slot in it with a worn out (small) cutoff wheel and using a BIG screwdriver with an adjustable wrench?

  5. #5
    Veteran Member Runner's Avatar
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    May 2007
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    1,682
    Location
    Missouri
    Tractor
    John Deere 2520, 1989 John Deere 185, 1960 Panzer T70B

    Default Re: Bolt Broken

    If it's flush with the surface, maybe you could place a nut over the surface of the bolt and weld inside the nut to attach it to the bolt?

  6. #6
    Veteran Member
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    Sep 2002
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    2,391
    Location
    Michigan

    Default Re: Bolt Broken

    I've had some luck with drilling with a left hand drill. The combination of heat , vibration and torque seem to loosen 'em up.

  7. #7
    Super Member
    Rest in Peace
    frank_f15's Avatar
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    Mar 2001
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    6,033
    Location
    BUFFALO ,NEW YORK AREA
    Tractor
    kubota b2400- R4 tires

    Default Re: Bolt Broken

    Quote Originally Posted by woodlandfarms
    OK, I am getting desperate.

    A bolt on my mower broke off rather low in the hole. I have been able to work it up to the surface but now it is completely jammed.

    I have lubed it, waxed it, hit it with a torch, Tried to use an extractor, and have been using the old school method of hammer and punch and working it around.

    I am concerned that all I have left is welding a bolt on and I am not much of a welder and this is quite flush.

    Looking for ideas I have not thought of.

    The bolt is 5/8" btw..

    Carl
    seeing how you were able to work the bolt out some of the way , i wonder if the female part is dinged at the top? screw the bolt back in and then use a thread chaser to clean up the threads and then try to work the bolt out. just an idea
    FRANK

  8. #8
    Platinum Member Superduper's Avatar
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    Jul 2006
    Posts
    504
    Location
    midwest
    Tractor
    John Deere 3120

    Default Re: Bolt Broken

    5/8" bolt is fairly large and if it's too difficult for you to weld you might be able to drill a smaller hole (3/16", 1/4" or 5/16") inside, tap that and run a longer bolt into it. Then if you tighten a jamb nut against the broken bolt, you should be able to remove it if it isn't seized. The fact that you were able to work it around suggests that this option is viable. If the outside diameter of the jamb nut is too large to jamb against the broken bolt, use a spacer or bushing between the broken bolt and new bolt.
    -----------------------------------------------
    There 's no such thing as idiot-proof; idiots are far too ingenuous.
    JD3120 eHydro, R4's, 300cx FEL, frontier 2060bb, Vrismo S100 Flail mower, AL1240f forks, wheel weights

  9. #9
    Silver Member DrRick's Avatar
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    Mar 2006
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    194
    Location
    san angelo, texas
    Tractor
    dk55, jd 450,case 811b,kioti mechron,farmal cub & super c

    Default Re: Bolt Broken

    I nsecond the left handed drill bits. I use that method first every time now. Get one a little smaller and by the time it makes a hole it usually just spins the piece right out. I keep a set of different sizes for this purpose alone. The smaller nut welded thru the inside onto the broken piece also works almost every time.
    good luck
    rick

  10. #10
    Super Member
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    Sep 2000
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    6,553

    Default Re: Bolt Broken

    The welding trick works, but if/when you splatter slag it can make the whole deal worse.

    I really like using left hand drill bits. Then tap some left hand threads and screw in a left hand bolt. That works slick, if you have the room.

    jb

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