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  1. #1
    Elite Member
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    Mar 2000
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    3,239
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    Eastern Virginia
    Tractor
    EarthForce EF-5 mini-TLB (2001)

    Default L4310\'s and very steep hills

    First of all, a few disclaimers (lest TomG, or others, rightfully chastise me for not being safety conscious [img]/w3tcompact/icons/smile.gif[/img]), in no particular order: Just because I do something on my tractor, don't assume that you should/can/etc. No matter how implausible this sounds when I describe the following stunt, I always try to operate the tractor in a safe manner. I've spent a lot of time exploring the limits of my tractor with safety mechanisms in place (like a backhoe bucket for a "wheelie bar" or stabilizers for "training wheels"). My tractor is very highly modified and may react very differently from your tractor (and by "differently" I don't necessarily mean "better", just "not the same"). I recommend against trying this - just take my word for it. (Aside to the "lawyers": Did I leave out anything?)

    Anyway: I found out something very interesting today. If you climb a hill steeper than just over 40 degrees (according to my side-mounted tiltmeter), the HST transmission stops picking up oil and begins to coast. Going down a hill that steep doesn't cause similar problems because the oil pickup is in the front of the transmission. I was a little surprised at first. I started up this hill, very slowly of course, then all of a sudden the tractor just stopped. I wasn't sure what had happened at first, but it dawned on me just as the tractor started to roll back down the hill. So, I tried backing up the hill instead - no problem. I don't think this is something that should be a problem very often, but just in case it ever happens to you (just don't do it because I brought it up!), now you know.

    MarkC


  2. #2
    Epic Contributor Bird's Avatar
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    Mar 2000
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    36,981
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    Texas

    Default Re: L4310\'s and very steep hills

    Well, since I just got my front to rear tiltmeter on the tractor today, I don't know how steep a hill I've ever tried to drive up, but I've never had the problem you mentioned (and probably never will, since I'm a bit of a coward on slopes anyway). I probably wouldn't have tried it except in reverse. Anyway, I hadn't thought about the possibility of the HST not picking up the oil, but it makes sense when you think about it.

    Bird

  3. #3
    Veteran Member gordon's Avatar
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    Apr 2000
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    1,786
    Location
    Delaware
    Tractor
    L4310hst-loader-hydraulic top link

    Default Re: L4310\'s and very steep hills

    Case in point back up the steep hills and drive down!
    By the way Mark your crazy!
    Stay safe
    Gordon


  4. #4
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    Default Re: L4310\'s and very steep hills

    BIRD,
    SINCE I'VE BEEN TO TEXAS A NUMBER OF TIMES, I THOUGHT THE ONLY HILLS TEXAS HAD WAS IF SOMEONE DUG A DITCH AND PILES UP THE DIRT = A HILL. NOW THE DITCH = A VALLEY.
    FRED


  5. #5
    Epic Contributor Bird's Avatar
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    Mar 2000
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    36,981
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    Texas

    Default Re: L4310\'s and very steep hills

    Well Fred, in my immediate neighborhood, you're almost right; tank dams, borrow ditches, and a few creeks (mostly dry this year) are about it.[img]/w3tcompact/icons/laugh.gif[/img] But of course, our tourist folks call Texas the "land of contrast" and I guess you know that we have some mountains that are taller than anything east of the Mississippi River. Just depends on what part of the state you were in.[img]/w3tcompact/icons/wink.gif[/img]

    Bird

  6. #6

    Join Date
    Sep 2000
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    1,862
    Location
    The Fabulous Foothills of Northern California

    Default Re: L4310\'s and very steep hills

    Mark, I often run in to situations that put the limits of the tractor to test. On the L4850 I use which is a gear driven "wet clutch" design, the hydraulic oil low light comes on and the hydraulics get questionable. This happens on a slope that approaches +45 degress. The backing up theory mentioned does not work as it won't back up the hill as well as it will go up the hill. I stop the moment I get sideways and work the front loader from that point. I find this kind of work challenging but exciting. The other day a JCB backhoe was working the same hill and had the 4n1 jaw wide open to elevate the front end, loader down all the way and still he was not level to dig. I had wished I had taken a picture of it as it looked interesting and thought you of all people would have enjoyed it. I had not thought of the HST and its pickup being in the front. I often wonder about the level of the fluid and if it should be taken when all the hydraulic cylinders are collapsed and in a cool situation. This will give you the greatest amount of fluid as registered by the dip stick, but not necessarily the desired level during normal operating conditions. Enjoy your posts, Rat...


  7. #7

    Join Date
    Apr 2000
    Posts
    325
    Location
    upper Mich.
    Tractor
    Kubota L4610 HST with loader

    Default Re: L4310\'s and very steep hills

    Mark thanks for the tip! Im glad you didn't, tip that is.[img]/w3tcompact/icons/smile.gif[/img] I found a hill that i could'nt get up, loss of traction even with the Big tires, they would spin but no go, had to use the bucket to get back up the hill as it was the only way out. The slope at the top mite be 30 to 40 deg. but im sure glad that i didn't go flying back down. Qust do you think there is any problum with putting say a extra gal. of oil in the hyd. system?
    Rich


  8. #8
    Veteran Member
    Join Date
    Aug 2000
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    1,591
    Location
    Western Connecticut
    Tractor
    2003 Kubota L3430

    Default Re: L4310\'s and very steep hills

    Richh

    I'm curious, were you trying to go up frontwards or backwards? Did you try the other direction? What do you mean you used your bucket to get up the hill?




  9. #9
    Elite Member
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    Mar 2000
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    3,239
    Location
    Eastern Virginia
    Tractor
    EarthForce EF-5 mini-TLB (2001)

    Default Re: L4310\'s and very steep hills

    Rich - I've been looking at the shop manual and I can't see any reason an extra gallon or so of oil would hurt anything, but there may be other factors involved.

    Do you have ballast in the rear tires? How much pressure are you running in them? Did you have an implement on the back? What kind of surface were you trying to get traction on?

    MarkC


  10. #10

    Join Date
    Apr 2000
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    610
    Location
    Ontario
    Tractor
    Ford 1710: Loader, Hoe, Snowblower, Box scrapper & 3ph Forks

    Default Re: L4310\'s and very steep hills

    Sounds like the Model-T Ford truck problem. I'm told they often could be seen backing up hills. The gravity feed gas tank was behind the seat--barely higher than the engine on a level.

    Of course, if the tractor goes up the hill the other way, then another quart of oil isn't needed. Well then, guess that brings up the old safety subject of which way up the hill with which I now seem to be identified. But then I can be brief. The archives say it all, and more, and more, and then some.... Can't stop wondering though if the Model-T design made them more, or less, safe.


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