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  1. #1
    Veteran Member pclausen's Avatar
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    May 2008
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    Nelson County, VA
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    JD 5085M, JD 1445, JD GT235, JD LT166

    Default Do I need a torque multiplier to get these nuts off?

    I got a Bush Hog 3209 cutter, and I'm trying to get the 1 5/16" bolts off that holds the blades on as I'm replacing them.

    The 4 nuts have been soaking in PB blaster for a week, but neither my 3/4" impact wrench (being feed from a 1/2" hose @ 150 psi), nor my 3/4" ratchet with an extension will break any of them free.



    I spoke to my dealer about it and they use a torque multiplier in the shop for getting bolts like that loose. Here's a link to one that takes a 3/4" input:

    Central Tool 6387 4:1 Torque Multiplier : Amazon.com : Automotive

    Does anyone have any experience with these devices? For that price, I wonder if I would be better off getting a monster 1" impact wrench? On the other hand, it would be nice to be able to accurately torque large bolts.

    Any other thought on how to break these nuts free? I'm have reservations about using heat given that the bolt are hard to get to and I don't want to cause damage to anything else.
    JD 5085M w/ H260 MSL Loader, Frontier AV20G Grapple, Frontier AP13G Pallet Forks, Woods BH1050 Backhoe, Woods SG100 Stump Grinder, Woods RM990 Finish Mower, Woods RB850 3 Way Hydraulic Blade, Woods LR108-2 Rake, Maschio H205 Tiller, Bush Hog 3209 Cutter, Vermeer 906 Chipper, Valby SGR76 3pt Grapple, Shaver 601H Post Digger, Tufline 8' Disc Harrow, Vicon Vari-Spreader MK-II 400, JD 45 16-3 Bottom Plow
    2002 Silverado Duramax 3500 Crew Cab LT 4x4
    BigTex 22.5K 25' Gooseneck Trailer

  2. #2
    Elite Member whistlepig's Avatar
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    Jan 2009
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    3,906
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    Preble County, Ohio
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    Kubota B7800 with FEL

    Default Re: Do I need a torque multiplier to get these nuts off?

    A little heat will go a long way on removing frozen nuts and bolts. Heat it quick so the heat doesn't have time to travel to areas that can be damaged (seals).
    ........Shoot this thang! Have mercy this thang is killin' me. Just shoot up here amongst us. One of us has got to have some relief..............
    jerry clowers-a coon huntin story.

  3. #3
    Elite Member 300UGUY's Avatar
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    Apr 2004
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    3,051
    Location
    Howell, Michigan
    Tractor
    Kubota L3400, Farmall H

    Default Re: Do I need a torque multiplier to get these nuts off?

    Quote Originally Posted by whistlepig View Post
    A little heat will go a long way on removing frozen nuts and bolts. Heat it quick so the heat doesn't have time to travel to areas that can be damaged (seals).
    A lot of bolts like that have loctite on them. Heat will break the locktite bond. A fastener that large with loctite on it is really hard to remove. I have had 1 inch plus bolts that I could jump on a 4 ft cheater bar, and it wouldn't budge. A little heat, and it came off easily.

  4. #4
    Platinum Member JD 4520's Avatar
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    Brinnon, WA
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    John Deere 4520

    Default

    Quote Originally Posted by whistlepig
    A little heat will go a long way on removing frozen nuts and bolts. Heat it quick so the heat doesn't have time to travel to areas that can be damaged (seals).
    Heat is your best answer. I assume you haven't had these off before. I wouldn't spend the money on a larger impact wrench.
    Gary

    JD 4520, 400X FEL, Frontier Front Blade, Box Blade, Rotary Cutter, Landscape Rake, 48" Wildkat Grapple and PHD

  5. #5
    Veteran Member
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    1,771
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    Doniphan, Mo.
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    Kubota L4240, B7800 & BX2660

    Default Re: Do I need a torque multiplier to get these nuts off?

    Are you sure they are right hand threads?

  6. #6
    Elite Member Zebrafive's Avatar
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    Aug 2010
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    South West MI
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    John Deere 2030, John Deere 6415

    Default Re: Do I need a torque multiplier to get these nuts off?

    I would go the torque multipler route. You might find a used one on ebay. They do work! You just need something to brace the multipers handle against (it wants to turn the opposite way).

    What is the torque spec of the nuts? 400-600 lb-ft?

    Also consider other uses. What's the torque spec for your loader mounting bolts? If IRCC mine are 390 lb ft and my torque wrench only goes to 200 lb ft. With a multipler set it at 96 lb ft and get 384 lb ft out, probably some losses so set it at 100 lb ft and get close to 400 lb ft out.

    Or just get a longer pipe
    John Deere 2030 JD 245SL Loader
    John Deere 6415 mfwd JD 640SL Loader

  7. #7
    Elite Member whistlepig's Avatar
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    Preble County, Ohio
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    Kubota B7800 with FEL

    Default Re: Do I need a torque multiplier to get these nuts off?

    May be getting close to an irresistible force meeting an unmovable object here.
    ........Shoot this thang! Have mercy this thang is killin' me. Just shoot up here amongst us. One of us has got to have some relief..............
    jerry clowers-a coon huntin story.

  8. #8
    Veteran Member dstig1's Avatar
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    Apr 2010
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    W Wisc
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    Kubota L5240 HSTC, (Kubota L3130 HST - sold)

    Default

    Like all too many main crank pullies on engines.... I have laid into these with a large impact wrench, sometimes for 20+ minutes, ad long as your compressor can keep up. Heat is the only other good option. Don't be afraid to hammer that impact on it for extended time. Ear myffs help a litfor that.... :-)
    -Dave

    "Being a pessimist is great. You can't lose. Either you end up being right...or you are pleasantly surprised."

    L5240HST, QA, 824 Loader, 48" Forks, 48" Grapple, Ancient Farmi Skidding winch
    Trailer - 10k/16' twin axle w/elec brakes
    2005 F250 5.4V8(3V) 3.73/4wd tow vehicle

  9. #9
    Elite Member
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    Northwest, WA

    Default Re: Do I need a torque multiplier to get these nuts off?

    Some rental yards rent torque multiplers.
    ::Sent from a standard desktop keyboard::

    My Photobucket

  10. #10
    Silver Member v8only's Avatar
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    May 2012
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    Mb
    Tractor
    1988 John Deere 755

    Default Re: Do I need a torque multiplier to get these nuts off?

    Quote Originally Posted by Leejohn View Post
    Are you sure they are right hand threads?

    this.
    1988 John Deere 755
    52 Loader
    JD 59 Front mount snowblower
    60" MMM
    MFWD
    48" JD Model 40 tiller

    Craftsman YS4500
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