3020 Brake Valve Leaking
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Thread: 3020 Brake Valve Leaking

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    3020 Brake Valve Leaking

    Hey all, I have a 1967 3020 diesel and my brake valve has started leaking a little. It's leaking around the boots, and I was wondering if I could replace the two o-rings per pedal and install new boots while on the tractor. I don't have the time to remove the entire valve for a full rebuild right now and had a friend say you could replace the o-rings(#45&50). May try a full rebuild this winter but for now I need the tractor to continue working for me. Any advice is appreciated.






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    flyweight's Avatar
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    IMHO, you'll save yourself a lot of aggravation and time by removing the valve and placing it in a vise for repair.
    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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    Taking the valve off isnt a big problem but is it possible to do the repair im talking about without tearing it completely apart?


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    flyweight's Avatar
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    Quote Originally Posted by LR1997 View Post
    Taking the valve off isnt a big problem but is it possible to do the repair im talking about without tearing it completely apart?


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    You'll have to remove the floor-board to allow the brake pedals to swing back far enough to remove the cover(#55). To do this, the 3 bolts(#56) will have to be removed. These 3 bolts also retain the bottom housing to the top housing. The gasket(#1) will most likely tear; and leak fluid when assembled.

    This is the reason for my first reply.
    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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    So basically what you are saying is I need to remove the Valve, and make sure to replace that gasket as well?


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    flyweight's Avatar
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    Quote Originally Posted by LR1997 View Post
    So basically what you are saying is I need to remove the Valve, and make sure to replace that gasket as well?


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    What I said(in not so many words) was doing the repair as you asked will most likely cause other issues.

    Believe me, I've tried it before, many moons ago.
    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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    Ok I gotcha. So you recommend a full rebuild when I get the available time?(Probably this winter) Is it a very difficult task to rebuild them? What all do you replace when you rebuild them? The brakes work fine, it just leaks a little and I despise leaks. I have the mechanical knowledge to do it(Just rebuilt the motor and new clutch). I just have never been in one of these brake valves. I have a big JD tech manual which I have not looked at for info on the rebuild yet


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    flyweight's Avatar
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    Not difficult to rebuild. Having the Tech Manual is a plus.

    Other than the brake valve kit(part # AR 31946), you may need to replace the 2 boots(part # R54059).
    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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