H120 Mast Bolts Loose
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    Adamski's Avatar
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    Cool H120 Mast Bolts Loose

    Guys,

    I've been doing some pretty heavy loader work this winter - pushing snow plow furrows back and up into piles to maintain roadway width. I noticed my loader making an occasional noise or movement that disturbed me so I checked the 9 bolts on each mast. The 3 outer bolts on the left mast were slightly loose. I tightened them using a 24mm socket on a 1/2" drive breaker bar.

    Just one more thing for you guys to be aware of in case it happens to you.
    FredHickory likes this.
    Larry

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    It's mentioned in the loader manual to re torque those bolts every so often. This should be done probably at least annually in my book. Change the engine oil? Check your lug nuts and loader mounts. Give the entire machine a good looking over while greasing it as well. All good PM.
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    Larry, thanks for the heads up. Did you torque those bolts, or did you just tightened them up as much as you could? Last I remember, when I was doing my first 10 hour "re-torque" everything PM, my 150 ft-lb torque wrench didn't go up high enough for the mast bolts. I think I did a "as tight as I could" with my 18" breaker bar.

    What does everyone else do? I priced out a larger torque wrench, but couldn't justify spending a couple hundred dollars for a tool I'll only use once every few years.

    Just my 2 cents.
    Tom

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    CyberShanks's Avatar
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    I wouldn't crank down on an 18" bar as hard as you can. Example, a 180 lb guy lifting himself by the end of that wrench can put as much as 270 ft lbs at the bolt. A descent torque wrench can be had for 50-80$ that can service from ~35-250 ft lbs and it can be used on your regular vehicles wheels, etc. I have a husky one before they went to china. It has served me well.

    Jim
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    HydroHarold's Avatar
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    Quote Originally Posted by Adamski View Post
    Guys,

    I've been doing some pretty heavy loader work this winter - pushing snow plow furrows back and up into piles to maintain roadway width. I noticed my loader making an occasional noise or movement that disturbed me so I checked the 9 bolts on each mast. The 3 outer bolts on the left mast were slightly loose. I tightened them using a 24mm socket on a 1/2" drive breaker bar.

    Just one more thing for you guys to be aware of in case it happens to you.
    So, did tightening it down stop the symptoms? Re-torquing is just another regular maintenance item for bolted together stuff that gets twisted and worked hard.
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    Tomfive's Avatar
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    Quote Originally Posted by CyberShanks View Post
    I wouldn't crank down on an 18" bar as hard as you can. Example, a 180 lb guy lifting himself by the end of that wrench can put as much as 270 ft lbs at the bolt. A descent torque wrench can be had for 50-80$ that can service from ~35-250 ft lbs and it can be used on your regular vehicles wheels, etc. I have a husky one before they went to china. It has served me well.

    Jim
    I agree with your reasoning, and thinking back, my "tight as I could" was a good estimate for me. I weigh in at 150-155, and the mast bolt torques should be 230 ft-lb (I just looked it up). So my 18" breaker bar and my weight should have been "just about right"

    Thanks for clearing that up. I'm usually anal about torquing everything I can find a number for, (broke too many bolts in my youth). and my 40 year old 150 ft-lb beam torque wrench has been enough for 99-44/100 of everything I needed to tighten. I also like tools, and didn't want to buy something cheap, guess it's time to buy a new wrench .
    HydroHarold likes this.
    Tom

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    CyberShanks's Avatar
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    Good accidental torque there man. Not sure what the downside of over cranking these too tight would be. I know mine have rotation and slip side to side even when torqued to spec.

    I've broken a lot if bolts in my lifetime too. :beer:

    Jim
    '11 3005 4wd R4s w/300 & 60" Std w/Pirahna tb, Artillian 36" forks, Custom 83" SnowBear front blade, Frontier RB2060 blade, King Kutter TG-G-60 tiller and RFM-72 mower, Spee-Co Model-65 phd, Fimco LG-40-3PT sprayer, Tarter SUBY and TMY, Agri-Fab 24x48LR lawn roller & John Deere BW15073 and 6x42lb weights.
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    Great reason to buy a new tool-a torque wrench. It doesn't have to be the best, if your off by a few pounds either way no biggie-at least they all be consistent. They are great for the wheels also, on your tractor and you car/truck with aluminum wheels.
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    Adamski's Avatar
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    Cool

    Quote Originally Posted by Tomfive View Post
    Larry, thanks for the heads up. Did you torque those bolts, or did you just tightened them up as much as you could? Last I remember, when I was doing my first 10 hour "re-torque" everything PM, my 150 ft-lb torque wrench didn't go up high enough for the mast bolts. I think I did a "as tight as I could" with my 18" breaker bar.
    Tom,

    Well, it turns out you and I weigh in at the exact same poundage. Those are big bolts (no doubt high-strength too) and I knew there was no chance of snapping one off. So I just pushed down with about 90% of my weight. The 6 bolts that bolt the mast flange to the tractor frame were all tight - I couldn't tighten those even a smidgen. So, with those bolts that tight, I figured I could tighten the 3 outer bolts the same way.

    I assume that flexing of the tractor frame when raising the bucket is what would cause these bolts to loosen. I've been jamming the bucket into ice/snow at the side of the road and then curling to break the stuff loose and then lifting and pushing ahead to push it back from the roadway. Sometimes the bucket would catch harder (in the ice) on one side than the other to the point where the opposite side rear wheel would lift up. That twisting/flexing could be responsible for the bolts loosening. I certainly know I'm not responsible for it.
    Larry

    "Good advice often goes unrecognized until it's too late."

    1026R tractor, H120 loader, 60D mid-mount mower, JDiMatch, RB2060L rear blade with hydraulic angling, JD ballast box, 40" hydraulic core aerator, 38" dethatcher, home-made duo screen and several JD hats.

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    xcopterdoc's Avatar
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    All loader mount bolts I do get a dose of loc-tite 271 (red) and torqued to spec. No problems so far.
    Vern1026R likes this.

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