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  1. #1
    Bronze Member
    Join Date
    Jun 2007
    Posts
    83
    Location
    Harpers Ferry,West Virginia
    Tractor
    JD 4115

    Default Bush Hog blade bolt stuck, need ideas

    I hope this is the right forum but anyway I have a new used BHTH 72 finish mower and I can't get one of the blades off. The bolt is on there tight. I can get it to turn but the top nut on the spindle starts to turn. I though if I could unscrew the top nut the whole spindle would drop and I could work on it that way but it didn't happen. Any ideas would be helpful. By the way I did try an air inpact tool. Thanks Larry

  2. #2
    Elite Member schmism's Avatar
    Join Date
    Jul 2006
    Posts
    4,829
    Location
    Peoria IL
    Tractor
    New holland TC(33)

    Default Re: Bush Hog blade bolt stuck, need ideas

    do the blades turn when you turn the bottom bolt?

    i got mine off by wedgeing a 2x4 block upagainst various locations of the deck so the blades wouldnt turn.

    worked great for takeing them off.... not so much for tighting them back down
    Steve - TC33D 4x4 FEL, dual rear remotes with toys

  3. #3
    Silver Member
    Join Date
    Jun 2006
    Posts
    109
    Location
    S.E. Michigan
    Tractor
    New Holland TC33DA

    Default Re: Bush Hog blade bolt stuck, need ideas

    Heat and/or penetrating oil. Also impact tools require high volume as well as pressure, to work at their rated capacity. Short fat air hoses are good for impact tools. Put a wrench on the top nut to keep it from spining. Greg
    Greg in SE. Mich. TC33DA,SS,FEL,72"MMM,72"FB,
    72"RB,60"BB,5'RC,PHD

  4. #4
    Gold Member
    Join Date
    Apr 2005
    Posts
    273
    Location
    Catharpin, VA
    Tractor
    Kubota L3400 HST

    Default Re: Bush Hog blade bolt stuck, need ideas

    Mine was really stuck before I put a strong impact wrench on it. I tried heat, penetrating oil, a 3' breaker bar and none of them worked.

  5. #5
    Gold Member
    Join Date
    Mar 2005
    Posts
    347
    Location
    Eads, TN

    Default Re: Bush Hog blade bolt stuck, need ideas

    I've actually heard somewhere on the forum of someone using "wax" to loosen rusted on nuts and bolts. Try doing a search and you might find it. I believe they heated up the bolt or nut and then applied a candle or wax to the hot area and the wax sucked up into the threads, loosening the bolt or nut.

  6. #6
    Gold Member
    Join Date
    Mar 2005
    Posts
    347
    Location
    Eads, TN

    Default Re: Bush Hog blade bolt stuck, need ideas


  7. #7
    Gold Member Kubotasrking's Avatar
    Join Date
    Jul 2006
    Posts
    318
    Location
    Northwest, WA
    Tractor
    NH TC45D

    Default Re: Bush Hog blade bolt stuck, need ideas

    Quote Originally Posted by Newtogreen
    I hope this is the right forum but anyway I have a new used BHTH 72 finish mower and I can't get one of the blades off. The bolt is on there tight. I can get it to turn but the top nut on the spindle starts to turn. I though if I could unscrew the top nut the whole spindle would drop and I could work on it that way but it didn't happen. Any ideas would be helpful. By the way I did try an air inpact tool. Thanks Larry

    a little heat should do the trick.
    Bob
    "The problems that exist in the world today cannot be solved by the level of thinking that created them."
    - Albert Einstein

  8. #8
    Elite Member George2615's Avatar
    Join Date
    Feb 2005
    Posts
    3,175
    Location
    Central Square, NY
    Tractor
    LS XR3037HC

    Default Re: Bush Hog blade bolt stuck, need ideas

    I usually use my impact gun to remove blade bolts. I've also had some bolts the gun won't budge but by hitting / shocking the bolt head a few times with a big hammer then the gun will take it off. The hit seems to loosen the bolt threads that may have a little rust on them.

  9. #9
    Super Member
    Join Date
    Feb 2006
    Posts
    7,681
    Location
    VA
    Tractor
    JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500

    Default Re: Bush Hog blade bolt stuck, need ideas

    Newtogreen, The impact gun is the way to go. For that to work well in your apparently tuf situation you will need to couple some mass rigidly to the spindle for the impacts to work against. Ordinarily the blade is attached well enuf that the spindle wont turn with the blade stationary. If the spindle is turning with blade stationary it is weird and more of a problem. You will have to attach mass rigidly to the pulley somehow. Then the impact, if a good one, will take it off.
    larry

  10. #10
    Bronze Member
    Join Date
    May 2005
    Posts
    97
    Location
    Lopez Island, WA
    Tractor
    Kubota/L3400

    Default Re: Bush Hog blade bolt stuck, need ideas

    I had a very similar situation with my DR field and brush mower. The blade nut was stuck and the only way to prevent the spindle from turning was to put a wrench on the top nut. The blade mount hole was not keyed so bracing the blade didn't help. Naturally the top bolt would come off but that didn't help me get the blade nut off.

    We tried everything - heat, cheater bars, impact wrenches - nothing worked. I hadn't discovered TBN at the time so I didn't know about the hot wax trick or I would have tried that too.

    Eventually we used a torch to cut the nut off and then we saw what the problem was. Somewhere along the line I must have really hit a rock that damaged the spindle that the nut was screwed onto. The threads were so damaged that there was NO WAY that bolt was going to come off. I ended up replacing the whole spindle and bearings.
    Kubota L3400, FEL, Backhoe, mower deck, trash fork, box blade, 5x10 dump trailer, Post Hole Digger.

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