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Thread: 1976 John Deere 300

  1. #11
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    Display Name: Greg Olson
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    Looking in the Deere parts catalog they show 2 different versions of where the hydroshock is located. part number AM35220 and is #12 in the diagram. You may get lucky and have the style in the rear.
    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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    Always wheeling n dealing (Spokane,WA)

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  3. #12
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    Quote Originally Posted by John Deere 110 View Post
    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)
    well I swapped my transmission and it will not go in reverse and it is jerky in forwards...any ideas would appreciated.
    Andrew

    1973 110,
    1972 110,
    1973 110,

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    1988 420,
    1981 400,

    1976 300,

    1987 160,

  4. #13
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    Display Name: jdalchemist

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    As a first, easy step, have a look at the two check valves on top of the tranny. These have little spring-loaded pins that are depressed to allow for manually rolling the tractor. If a pin is dirty or rusty it may not spring back up completely and the tractor will not operate in one or both directions or can have slow, jerky movement. The symptoms you describe could also be due to hydro linkage problems, bad hydro fluid or filter, an air leak, etc.
    Harold
    JD 400's, 420's, 425, 317's, 318's, 300, 112's, 110's; Brantly backhoe and loader on 400; 30 and 33 tillers; 49 and 50 blowers; 43, 54 and 56 blades; mower decks, cabs, etc.

  5. #14
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    I agree with jdalchemist but would also add that your hydroshock is most likely worn out. If you are lucky you may be able to swap the one off of your parts tractor. They are still available part number is AM35220. mine was herky jerky til I replaced it. Once off it is easily tested. I am going to assume you have changed your fluid to proper level and new filter. If not use jd low-viscocity highguard and filter AM39653. You can look up your parts here. https://partscatalog.deere.com/jdrc/sidebyside/equipment/82557/referrer/navigation/pgId/20377682
    1980 317 with KT17 series 2/remote oil filter kit
    1979 317 with Onan P218G and diverter valve
    1968 112 repowered with 9HP vanguard

    future projects
    1970 140H3 custom color april yellow
    1974 110
    1966 110H
    1965 110
    parts tractors
    1973 110
    1973 112
    1983 314
    Off color goodies
    73 Massey 8
    74 cub 1450 twin stick
    64 cub 100 project
    66 cub 123 project
    73 sears ST16
    69 sears suburban 12
    craftsman GT3000 main mower
    Yard Man 22hp W/snowblower
    Always wheeling n dealing (Spokane,WA)

  6. #15
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    Display Name: Andy

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    it has Automatic transmission fluid in it. this is my parts tractor's transmission.
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  7. #16
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    Display Name: Bob Meyer

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    Andrew, Early JD tractors recommended ATF, so that's OK. Based on your location, once you determine transmission is OK/good, drain fluid, change filter, and fill with lo-vis HyGard.

    jdalschemist & Gojo04 are on the right track. Check free wheeling valves first. In front of seat in center of seat pan is a black knob. Below this under seat pan are the free wheeling valves. Remove seat pan and GENTLY push the pins on top of the valve down. Watch pins and start tractor...pins should pop up. Penetrating oil, a pair of needle nosed pliers, and gentle persuasion should get valves to work. Next, follow linkage from hydro back to lever on dash. Look...push/pull...for any looseness. Last, remove "shock absorber" from tractor linkage. If you can move the rod in & out easily, it's shot!

    Check things out and get back to us with results/findings, 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. #17
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    Thanks for all your help I push the pins on top of the valve down then started my tractor they poped up! I put the cover back over them and realized the rod with the black nob on it was holding them down so I loosened that and my tractor drives grate is forwards and reverse!!! THANKS A LOT!!!!
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  9. #18
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    Nice...always good to find a simple fix.

  10. #19
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    I have a parts 300 and I'm hoping too take the hydraulics off of my parts tractor and put them on my running 300! I was wondering if any one on here has dune something like that and if they could give me some ideas I'm hoping too use the "new" left valve for a rear hydraulic remote (I'm using the left one be cause it has down pressure) I don't know what too use the right one for (it will have up presser but no down pressure) I'm gonna mount the second valves if front of and a little higher then the original set. (so they will be in a block of 4)
    Andrew

    1973 110,
    1972 110,
    1973 110,

    1969 112,

    1988 420,
    1981 400,

    1976 300,

    1987 160,

  11. #20
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    Display Name: Bob Meyer

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    Andy, I believe the 300 has an H1 hydraulic system. This does not have a float position, but has down pressure. If you're judging "no down pressure" by the fact that an attachment on the front doesn't lift the tractor when the lever is pushed forward, you missing something! Pushing the lever forward supplies pressure to your front outlets AND your rockshaft (deck rise/lower cylinder). When the lever is pushed, the weight of the front attachment lowers it to the ground. Now you have to wait...maybe 5 -10 seconds... for the rockshaft cylinder to move to the end of its stoke. Still holding the lever forward, the pressure now goes to the front and will apply pressure to the front cylinder.

    Please post "why" you think you don't have down pressure.

    Also, you'll be much...much, MUCH... better off finding and H2 valve and installing that. 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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