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  1. #11
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    7,912
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: Up or down vs all the way up or all the way down?

    Sounds like its time to rebuild the internal lift cylinder and possibly the lift control valve.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  2. #12
    Platinum Member nspec's Avatar
    Join Date
    Dec 2007
    Posts
    606
    Location
    Southern Rhode Island
    Tractor
    Kubota B2630, '53 Farmall Super H, '47 Farmall AI, '44 Farmall A

    Default

    Isn't this how the draft control is supposed to work? The lift arms will try to drop as long as there is no draft force and the draft control is 'engaged'. A draft force will enable the draft control to try and raise the lift arms until draft forces are lessened. If you move the draft control lever to the other position (off), do the lift arms still drop?

    Also, one more thought....I'm not completely sure of the specifics of your tractor, but the older tractors had a draft control that was purely mechanical - usually a large spring was located behind the seat and connected somehow with the top link. Has this possibly been removed or altered, affecting the operation of the draft control? Just a thought.

  3. #13
    New Member
    Join Date
    Jul 2012
    Posts
    23
    Location
    Fruitvale CO
    Tractor
    Ford ???

    Default Re: Up or down vs all the way up or all the way down?

    My last reply did not seem to take for some reaso
    However I think that the information I have received for you folks is spot on (as they say in England). I will have to rebuild the lift cylinder and just maybe the entire hydraulic system.

    Thank you all for the information....

    Dean

  4. #14
    Elite Member
    Join Date
    Mar 2009
    Posts
    3,270
    Location
    Lee, IL
    Tractor
    John Deere 1070

    Default Re: Up or down vs all the way up or all the way down?

    Quote Originally Posted by nspec View Post
    Isn't this how the draft control is supposed to work? The lift arms will try to drop as long as there is no draft force and the draft control is 'engaged'. A draft force will enable the draft control to try and raise the lift arms until draft forces are lessened. If you move the draft control lever to the other position (off), do the lift arms still drop?

    Also, one more thought....I'm not completely sure of the specifics of your tractor, but the older tractors had a draft control that was purely mechanical - usually a large spring was located behind the seat and connected somehow with the top link. Has this possibly been removed or altered, affecting the operation of the draft control? Just a thought.
    The way I understand draft control is that you set the position of the tph, then if there are draft forces applied- it will raise until those forces are gone, then will return to the position that you originally set. I have draft control on my tractor but have not yet used it, so could be wrong.

  5. #15
    Platinum Member
    Join Date
    Oct 2006
    Posts
    590
    Location
    Thumb, Mich

    Default Re: Up or down vs all the way up or all the way down?

    To add to the preceding: When you are seated in the operator's seat, reach down with your right hand to find a two-position lever. This is to select "draft" or "position" control. When this lever is pointing upward you have selected "position" control, and when it is pointing forward you have selected "draft" control. In "position" control the lower links will raise or lower in direct relationship with the position of the Lift Control Lever. Hope this is helpful.
    The Opti-Mist

  6. #16
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    48,794
    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Up or down vs all the way up or all the way down?

    so far.

    are you in draft mode. if in darft mode it may act like all up or down.

    2nd.

    if it leaks off fast at shutdown.. you need to rebuild the lift cyl.

    while in there.. service the cam and cam follower pin. severely worn one will reduce yourlift resoloution and could be causing some of the probs you see.. espcially if it needs adjustment.

    refer tot he alternate adjustment procedure if it starts mentioning nuday tools that you will obviously not have access to.

  7. #17
    Member
    Join Date
    Nov 2012
    Posts
    27
    Location
    upstate ny
    Tractor
    ford 3400

    Default Re: Up or down vs all the way up or all the way down?

    Had a similiar problem on my ford 3400, the cause of mine was that the internal linkage under the lift cover was adjusted incorrectly and position control was not working as a result. Exact same symptoms as you had, with the exception that mine would hold a weight up when off. You will need to have the lift cover off and take some of the linkage apart to adjust it correctly. I had a service manual on hand and wouldn't have wanted to do it without one. In the process of doing this, you might as well get the lift cover overhaul kit and replace all the o-rings (usually less than $20 for the kit). If you are replacing the unload valve o-ring don't forget to order that too, it did not come in my kit. There is a critical measurement in the linkage adjustment (when you see .2" and a special tool mentioned in the manual) that is stated ambiguously, if you have trouble figuring out what it means (I did) let me know and I can try to describe it. That's the key measurement so if something doesn't look right/fit right you're probably interpreting the manual wrong. What soundguy said about the cam follower pin is also a possible cause, but that was not the issue on my machine. It is possible that your lift not holding under weight and your position control not working are two separate issues, so make sure to check the linkage if you're in there replacing the piston seals.

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