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  1. #1
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    Flint, MI
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    2008 Kubota B7800

    Default how to change a u joint on a brush hog driveshaft

    I haven't done this in awhile, & am having problems getting the old u joint out of the yoke on my Howse brush hog driveshaft. The old ring-type PTO end froze up & had to be destroyed to get it off. While I'm replacing the front yoke, I might as well replace the u joint. How does it come outa there?? I have pulled the circlips & pounded out the universal to a point it feels solid & won't move anymore, but it isn't clear of the other side of the yoke.

  2. #2

    Default Re: how to change a u joint on a brush hog driveshaft

    i had to replace the u-joint on my bushhog a few weeks ago. it was one of the hardest id ever gotten out. i had to beat on it many different and creative ways for almost an hour. do make sure all your snap-rings are out and then just go to it.

  3. #3
    New Member
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    2008 Kubota B7800

    Default Re: how to change a u joint on a brush hog driveshaft

    Thanks.
    I was hoping there was a trick to it...the mosquitos came out heavy tonight; I'll hit it hard in the morning.

  4. #4
    Super Member greg_g's Avatar
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    Western Kentucky
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    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: how to change a u joint on a brush hog driveshaft

    If you don't get the cross started on a straight path out of the yoke hole, it'll jam. Spray it with some penetrating oil, then look through your old sockets for one about the same diameter as the cross. Put the socket in the yoke hole, then hammer the socket to push the cross all the way through. I also find a little 3 pound sledge is more effective (in conjunction with the socket of course) than a finish or framing hammer.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  5. #5
    Elite Member sandman2234's Avatar
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    Jacksonville, Florida
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    JD2555 and a few Allis Chalmers

    Default Re: how to change a u joint on a brush hog driveshaft

    I always preferred a large vice, rather than beating on my sockets. (I still use the sockets when I can't find a piece of stock the right size)
    David from jax
    A serious accident is one that money won't fix.

  6. #6
    Platinum Member Gem99ultra's Avatar
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    Warm Springs, GA
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    Kubota L3400HST

    Default Re: how to change a u joint on a brush hog driveshaft

    Amen on the sockets and vice. After soaking a few minutes with PB Blaster, I just set the u-joint up in the vice with a socket on both sides. One needs to be small enough to go through the u-join saddle and the other large enough to catch the u-joint cap.

    Just good heavy steady pressure and they'll come right on out. I would NOT start beating on them with a hammer, especially on new ones that are going back in. You'll know needle bearings loose and end up having to trash the u-joint. Ask me how I know!

    I just pulled mine apart just for inspection and repacking. Nada problem-o.

  7. #7
    New Member
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    2008 Kubota B7800

    Default Re: how to change a u joint on a brush hog driveshaft

    Thanks for all the input. I got the cross out OK, but now there is a problem finding the right U-joint and yoke on a holiday weekend. Ain't gonna happen. I found a close match at TSC, but it is kind of flimsy compared to the Howse driveshaft. Anyone know of a good on-line source for U-joints & yokes?

  8. #8
    Super Member greg_g's Avatar
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    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: how to change a u joint on a brush hog driveshaft

    I just repaired a Eurocardan with parts from AgriSupply. You'd have to start by knowing who made the shaft that's on your Howse. But you're likely going to have the same long weekend problem with AgriSupply as well. I say this, because their online catalog doesn't really have enough detail to make sure you're clicking on the part number that you actually need. I had to phone in and give parts descriptions and measurements to a parts specialist.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  9. #9
    Super Member Farmwithjunk's Avatar
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    Where do I begin.....

    Default Re: how to change a u joint on a brush hog driveshaft

    Remove old U-joint. OR....Measure diameter of bearing caps and width of cross (inc bearing caps) Head to NAPA. Go home and install. I use a hydraulic press, but a vice is just as good. Hammers work in a pinch.
    There are three kinds of men;
    1.) The ones that learn by reading
    2.) The few who learn by observation
    3.) The rest of them have to pee on the electric fence for themselves.

  10. #10
    Gold Member
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    Wascott, WI, USA
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    2006 Jinma 354LE w/YD485

    Default Re: how to change a u joint on a brush hog driveshaft

    Quote Originally Posted by riant View Post
    I haven't done this in awhile, & am having problems getting the old u joint out of the yoke on my Howse brush hog driveshaft. The old ring-type PTO end froze up & had to be destroyed to get it off. While I'm replacing the front yoke, I might as well replace the u joint. How does it come outa there?? I have pulled the circlips & pounded out the universal to a point it feels solid & won't move anymore, but it isn't clear of the other side of the yoke.




    This is the way. Beating with hammers may get them out, but bad to get the new one in. Vises can bend, ask me how I know.

    Having the right tools is half the job.
    Alcohol, Tobacco and Firearms should be a convenience store, not a government agency.

    2006 Jinma 354LE w/YD485, ZL-30 FEL, LW7 backhoe, Rear blade, tiller, brush hog, box blade, post hole auger, snowblower, boom pole, carry all

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