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  1. #1
    Silver Member heviduty's Avatar
    Join Date
    Apr 2012
    Posts
    179
    Location
    central NC
    Tractor
    Kubota L3400HST/LA463 loader JD 318 / 3ph(cat. 0)

    Default Don't let this happen to you.

    Last year my FIL bought a used L4310 with fel to use in his small business doing yard work. A few weeks ago while using it he noticed a bolt laying on the fel frame where it bolts to the tractor on the right side. He tried to put the bolt back in, but a piece of the casting was broken off.

    When he told me about it, I suggested we check all the mounting bolts. All the bolts were loose on both sides and only two on each side would tighten. The rest were stripped.

    Not sure how or if this can be fixed short of replacing the casting, but for now he is using it with the four bolts holding it on. All the other bolts, except the one where the casting broke, are only snug, not tight. The loader is used only to load his dump truck with mulch or topsoil.

    I believe the damage had been done when he bought the tractor, but maybe it could have been minimized if we had checked them right away.

    Moral of the story is, guys, don't let this happen to you. Keep a check on your fel mounting bolts along with your wheel bolts and tighten them to the proper torque.
    Happy as if I had good sense.
    One orange, one green.

  2. #2
    Elite Member johnk's Avatar
    Join Date
    Jun 2003
    Posts
    2,624
    Location
    western NY
    Tractor
    Kubota GST Grand L3130 w/ 723 loader, Ags

    Default Re: Don't let this happen to you.

    Good maintinence tip for sure. We all get complacent and don't check things like we should.
    Kubota grand L 3130; 723 loader; Hinged back Box Scraper; 7' HD Back Blade; Tooth Bar; PHD w/ 9 & 12 Inch Auger; PEC; Carryall

  3. #3
    Bronze Member L4400's Avatar
    Join Date
    Nov 2007
    Posts
    68
    Location
    Haymarket, Virginia
    Tractor
    See signature

    Default Re: Don't let this happen to you.

    This exact same thing happened to a friend of mine with an older L4300 kubota tractor (that he bought new). I do keep an eye on my bolts now that this has happened to him.
    Kubota L4400 with LA703 loader w/ WR Long SS/QA adapter, 5' Anbo grapple, WR Long third function valve, 110" Befco finish mower, 5' King Kutter bush hog, 8' King Kutter landscape rake, 6' rear blade, 36" leaf blower, 3pt. fertilizer spreader, Leinbaugh post hole digger with 6" and 9" augers, Dearborn 2 bottom plow.

    Sears GT5000 with 26hp B&S engine, 48" mower deck.

  4. #4
    Super Star Member
    Join Date
    Jul 2011
    Posts
    14,436
    Location
    Yanceyville, North Carolina
    Tractor
    Kubota L4400

    Default Re: Don't let this happen to you.

    Thanks for posting the "Heads Up".
    The PUPIL who does not surpass his Master, fails his Master.

  5. #5
    Elite Member Bob77064's Avatar
    Join Date
    Sep 2011
    Posts
    3,972
    Location
    KY @ TN line
    Tractor
    2011 LS R3039

    Default Re: Don't let this happen to you.

    Some members have suggested using loctite.

  6. #6
    Elite Member
    Join Date
    May 2012
    Posts
    2,972
    Location
    Knoxville, TN
    Tractor
    Bobcat CT225

    Default Re: Don't let this happen to you.

    Definitely. I check mine every month or so, but I get about ten hours of use a month, so if I used it more often, I might check more frequently. I also heartily recommend the use of a torque wrench. A beam-type wrench (versus a "click" type) is pretty cheap, and takes all the guess-work out of installing bolts and nuts. For my loader bolts, which go to something like 160 ft-lbs, it's basically as hard as I can pull. But for my trailer lug nuts, which only go to 80 ft-lbs, I was surprised at how light it was, and had probably been over-torquing them (although not dangerously so, I don't think) for a while.

  7. #7
    Elite Member
    Join Date
    May 2012
    Posts
    2,972
    Location
    Knoxville, TN
    Tractor
    Bobcat CT225

    Default Re: Don't let this happen to you.

    Quote Originally Posted by Bob77064 View Post
    Some members have suggested using loctite.
    I would hesitate to use loc-tite. I bought a new tractor, with factory-installed loader, so part of the maintenance checks in the first fifty hours or so is checking torque on the loader bolts. The loader bolts came from the factory with paint marks indicating where they were installed to, and presumably they were torqued to spec at the factory. So, anyway, at the first few checks, there was always one or two nuts that were loose, sometimes by as much as 30 or 50 ft-lbs, but I could see from the paint marks that they had not actually moved at all. In other words, the loader frame "settled in," and what had been a tight nut/bolt was now loose. If they had been loc-tited, I would have had to break the loc-tite to bring the bolt to proper torque.

    I've observed this same phenomenon when rotating the tires on my vehicles, and it's no doubt why my trailer owner's manual recommends re-checking torque after 50 miles of driving, any time the wheels are removed.

  8. #8
    Veteran Member banjodunn's Avatar
    Join Date
    Jun 2008
    Posts
    1,229
    Location
    Oz

    Default Re: Don't let this happen to you.

    G'day you might want to look into a helicoil kit to repair your threads as far as the broken casting it may be possible to get it welded back in and rethread. We are constantly telling customers to check the loader mounts regulary as the loaders are painted and the tractor is painted and it will compress and break up as the machine is used and make the bolts loose.


    Jon

  9. #9
    Silver Member heviduty's Avatar
    Join Date
    Apr 2012
    Posts
    179
    Location
    central NC
    Tractor
    Kubota L3400HST/LA463 loader JD 318 / 3ph(cat. 0)

    Default Re: Don't let this happen to you.

    Quote Originally Posted by banjodunn View Post
    G'day you might want to look into a helicoil kit to repair your threads as far as the broken casting it may be possible to get it welded back in and rethread. We are constantly telling customers to check the loader mounts regulary as the loaders are painted and the tractor is painted and it will compress and break up as the machine is used and make the bolts loose.




    Jon
    Thanks, Jon, I'll look into that. I thought HeliCoil was only for small sizes but I just checked and they go up to 1 1/2" / 39mm.
    Happy as if I had good sense.
    One orange, one green.

  10. #10
    Elite Member s219's Avatar
    Join Date
    Dec 2011
    Posts
    2,748
    Location
    Virginia USA
    Tractor
    Kubota L3200

    Default Re: Don't let this happen to you.

    I checked the FEL bolts on my B2920 at the 50 service, and was surprised how many were loose.

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