Need someone knowledgeable on the ehydro system-4720!
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    Need someone knowledgeable on the ehydro system-4720!

    Just talked my dad into a new to him 4720 (700hrs) he has a new holland tc33 that this will replace and it took some doing to get him to go green...

    We drove over 6 hours yesterday to get it, (got what I feel is a good deal) drove it there and tested it out, loaded everything up, paid the man and drove 6 hours back home...

    Upon unloading at home and playing a little with it there it seems as if the transmission is not acting correctly... low range or "A" seems ok, no problem spinning.. however "B" range sometimes will bog the engine down, and others not so much, I think we got a high speed of 4mph out of "B" range forward and a little faster in reverse. Sometimes when going into a pile we could depress the forward pedal all the way and tractor would barely change tone.

    "C" range is worse then "B" with more "slippage" if that's what u want to call it? It had a top speed of 8mph I believe and like 9.5 in reverse.*

    It would do this with load match on or off, didn't seem to make a difference but im not exactly sure how load match acts normally because neither one of us have ever ran an e hydro, just mechanical ones... please help... I feel bad I talked him into this tractor and it's doing this. I think it's going to be something simple, I'm mechanically inclined and have a sense of some electronics, I'm thinking maybe it's a potentiometer? Can someone tell me how to test them and where they are? Could a dirty filter cause this? Thank you to all who respond!

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    ddinham's Avatar
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    I would get that hydro fluid changed immediately. Even if it was acting ok, I would still change it so I know it is good. It could very well be the original.

    Dave
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    Jer
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    I think I still have my service manual for mine, I think.....

    I'll check for you tonight. It's for sale if I still have it.

    -J.
    2014 JD 5075M (just barely pre T IV emissions), H310 with bucket mounted grapple, HLA powertine forks, 8' HLA snowblade, Schulte SDX-840 Snowblower, Rhino 12' Flail, 6' Sweepster 3pt PTO broom, hydraulic toplink from CCM, LED lights front and back, big pile of 3pt implements.

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    johnH123's Avatar
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    Remember, the pedal is a speed control, not a power control. (I think that's why they invented the throttle
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    Jer
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    Quote Originally Posted by johnH123 View Post
    Remember, the pedal is a speed control, not a power control. (I think that's why they invented the throttle
    Unless you have auto-throttle.....

    I hope his solution is that easy, but I doubt it.....

    -J.
    johnH123 likes this.
    2014 JD 5075M (just barely pre T IV emissions), H310 with bucket mounted grapple, HLA powertine forks, 8' HLA snowblade, Schulte SDX-840 Snowblower, Rhino 12' Flail, 6' Sweepster 3pt PTO broom, hydraulic toplink from CCM, LED lights front and back, big pile of 3pt implements.

    2006 JD 3120 with R3 Turf Tires, 300x loader, Artillian Forks & Trailer Mover

    Gator 825i S4 - NOW WITH TRACKS!!!

    2014 pre-emission 997 with 60" deck

    Wish List:
    now that I have a cozy cab, nothing really....

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    Quote Originally Posted by ddinham View Post
    I would get that hydro fluid changed immediately. Even if it was acting ok, I would still change it so I know it is good. It could very well be the original.

    Dave
    I plan on doing a complete service on the tractor... May even have JD do it if i can't get this figured out..

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    Quote Originally Posted by Jer View Post
    I think I still have my service manual for mine, I think.....

    I'll check for you tonight. It's for sale if I still have it.

    -J.
    I would be interested in it if you have it, why did you get rid of your tractor?

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    No I don't have throttle control, just load match, and right now with the way things are i can't tell a difference at all with that on or off.... Ive figured out through a post on another forum that my speeds are off... On level blacktop road, in "A" range, wide open throttle (just for consistency, no need to run the tractor wide open) and with pedal fully depressed im maxing out at 2.7mph according to the dash speedometer, In "B" range top speed is 4.4, and in "C" range it is 7.3... and in every range it is slightly faster in reverse I didn't write down "A" and "B" but in "C" range it'll do 10.9mph and the other 2 ranges are about 2mph faster then going forward... any ideas?

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    Jer
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    I moved up to a 5M series.

    I'm going to check for you right now.

    All of your ranges are slow. From what I remember A max should be about 4, B about 6.5, C about 15 or 16.

    Sumpin' aint right, but don't fret, you'll love the eHydro once you get her going.

    Have you called the person who sold you this unit?

    -J.
    2014 JD 5075M (just barely pre T IV emissions), H310 with bucket mounted grapple, HLA powertine forks, 8' HLA snowblade, Schulte SDX-840 Snowblower, Rhino 12' Flail, 6' Sweepster 3pt PTO broom, hydraulic toplink from CCM, LED lights front and back, big pile of 3pt implements.

    2006 JD 3120 with R3 Turf Tires, 300x loader, Artillian Forks & Trailer Mover

    Gator 825i S4 - NOW WITH TRACKS!!!

    2014 pre-emission 997 with 60" deck

    Wish List:
    now that I have a cozy cab, nothing really....

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    Jer
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    You, my Pennsylvanian-in-$hit-from-your-old-man friend, are in luck. I have the tech manual in my hands.

    Make me an offer. I can get it in the mail for you in the next couple days.

    -J.
    2014 JD 5075M (just barely pre T IV emissions), H310 with bucket mounted grapple, HLA powertine forks, 8' HLA snowblade, Schulte SDX-840 Snowblower, Rhino 12' Flail, 6' Sweepster 3pt PTO broom, hydraulic toplink from CCM, LED lights front and back, big pile of 3pt implements.

    2006 JD 3120 with R3 Turf Tires, 300x loader, Artillian Forks & Trailer Mover

    Gator 825i S4 - NOW WITH TRACKS!!!

    2014 pre-emission 997 with 60" deck

    Wish List:
    now that I have a cozy cab, nothing really....

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