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  1. #1
    New Member
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    honeoye falls
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    jd 4200 hst

    Default John Deere 4200 HST transmission problem

    Driving Tractor in Low Gear and transmission jumped out of Gear
    Tractor is in Neutral and will not go in any Gear
    Any Ideas to Try / Fix?

  2. #2
    Super Star Member Egon's Avatar
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    Default Re: John Deere 4200 HST transmission problem

    I believe some folks have had problems with shaft going into the housing breaking off??
    Egon
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

  3. #3
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    jd 4200 hst

    Default Re: John Deere 4200 HST transmission problem

    Egon
    PTO runs fine
    but tractor does not move when you depress pedal

  4. #4
    Veteran Member
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    Eastern Ia
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    JD 4310 eHydro,

    Default Re: John Deere 4200 HST transmission problem

    Egon was talking about the shaft going to the range selector. There is a o-ring groove in the shaft and 4x00 are known to break off. If you do a search there will be hours of fun reading.

    I would shut off the tractor and try to engage the range selector.

  5. #5
    Super Star Member Egon's Avatar
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    Default Re: John Deere 4200 HST transmission problem

    Quote Originally Posted by mfreund View Post
    Egon was talking about the shaft going to the range selector. There is a o-ring groove in the shaft and 4x00 are known to break off. If you do a search there will be hours of fun reading.

    I would shut off the tractor and try to engage the range selector.
    Thank you. That is what I was visualizing but not stating properly.
    Egon
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

  6. #6
    New Member
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    jd 4200 hst

    Default Re: John Deere 4200 HST transmission problem

    Looking @ parts diagram I see this shaft but it has a spring pin (which I'm thinking is what has failed) that attaches it to drive bushing
    PTO shaft runs okay, so I am assuming this is where the break in power line is.
    Do you know if this is an easy fix?
    Is there an cover which I can remove to change out spring pin?
    or do I need to disassembly entire transmission?

  7. #7
    Elite Member dfkrug's Avatar
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    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: John Deere 4200 HST transmission problem

    Quote Originally Posted by butchchris View Post
    Looking @ parts diagram I see this shaft but it has a spring pin
    (which I'm thinking is what has failed) that attaches it to drive bushing
    PTO shaft runs okay, so I am assuming this is where the break in power line is.
    Do you know if this is an easy fix?
    Is there an cover which I can remove to change out spring pin?
    or do I need to disassembly entire transmission?
    Why do you assume it is a spring pin? If the shift shaft has
    broken off entirely, it would have separated. If not, then it
    could be one of 2 pins, yes.

    There is one holding the shaft to the external bellcrank, and one inside
    the trans, holding the shaft to the shifter fork.

    Fully replacing the shaft does not require taking apart the trans, but
    you would have to remove the 3-pt cylinder housing. I have done 2 of
    these repairs.

  8. #8
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    jd 4200 hst

    Default Re: John Deere 4200 HST transmission problem

    Found problem
    Broken shifting fork
    John Deere most have know it was problem
    They can out with a new robust kit to replace both shifting forks, housing and shaft
    I fell a lot better about this repair now
    Much stronger design!

  9. #9
    Super Star Member Egon's Avatar
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    Default Re: John Deere 4200 HST transmission problem

    Good show.
    Egon
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

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