1976 John Deere 300
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Thread: 1976 John Deere 300

  1. #1
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    Display Name: Andy

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    1976 John Deere 300

    So I have been asking a punch of questions a bought my 1976, 300 so I deiced to post a new thread in stead of doing one for each question.

    my problem at this time is my transmission has a oil leek, is there a oil thickener that I can put in my transmission or do I half too replace all my gaskets on transmission? is there a common place for them too have oil leeks?

    and it is jerky in reverse.
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

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    Display Name: Bob Meyer

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    Oil thickener: DO NOT USE! Your transmission is hydrostatic, meaning hydraulic, and requires a specific oil. Based on your Idaho location, probably JD low vis hyguard.

    Leak(s): No particular common place for a leak to occur. It could be a loose oil filter, a loose fitting, a cracked transmission case, or anything in between...including a bad gasket! Remove fender pan, clean/wash hydro, and dry. Jack tractor, place on jackstands and run, both Fwd & Rev. At this point, all you can do is watch to see exactly where the leak is occurring and repair that area. Bob
    '80 317 w/18hp B&S and divert valve for rear hydraulics, 3 pt hitch, 5' york rake
    '82 314 w/rear PTO for tiller
    33 tiller
    49 thrower
    54 4 way blade
    Mod 48 deck & Mod 462 TracVac

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    okay I will not use oil thickener. I'll take the fender pan off and see if I can find it. (I already need to take it off to put my new rear lights on it.)
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

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  6. #4
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    I cleaned my transmission last night then I ran it for 15+ minuets and I found my oil leek.(this is not my transmission) but my oil is leaking where is cycled, it leeks on the bottom.wrtgwe.jpg
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  7. #5
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    Display Name: Bob Meyer

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    Kinda hard to tell where it's leaking from photo. If between to aluminum castings...held together with about 8 bolts...there's a gasket in there that could be bad/leaking. First, put a wrench on the bolts to be sure they're tight! Not sure if that's a pressure area, so cleaning with parts cleaner and adding RTV may seal it. The best way is to replace the gasket.

    If it's leaking from the charge pump...housing on front with 2 bolts... there's an o-ring inside. I believe this IS pressurized and will need a new o-ring. Check bolts first! Bob
    '80 317 w/18hp B&S and divert valve for rear hydraulics, 3 pt hitch, 5' york rake
    '82 314 w/rear PTO for tiller
    33 tiller
    49 thrower
    54 4 way blade
    Mod 48 deck & Mod 462 TracVac

  8. #6
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    Display Name: Andy

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    my transmission is jerky in backwards all the time and in forwards some times how could I fix that?

    this is my transmission the arrow is where the oil is leaking from.
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  9. #7
    Senior Member
    Display Name: Andy

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    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  10. #8
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    Display Name: RussK
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    Worn linkage parts or a bad shock or both.

  11. #9
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    I'm thinking a bought swapping my transmission in my 1976 300 with my parts 300 be cause my parts 300 does not leek when it is off(I don't know a bought when it is under presser)
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  12. #10
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    Display Name: Greg Olson
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    Your hydroshock is probably worn out would be my guess why it is jerky. I had one doing the same thing. The hydro shock in my 317 was in the dash making it a bear to replace. Some models have them in the back and is much easier. I think that may be the open frame version though!
    1980 317 with KT17 series 2/remote oil filter kit
    1979 317 with Onan P218G and diverter valve
    1968 112 repowered with 9HP vanguard

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