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D12 QUESTION HYD
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
Points: 3531 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Topic: D12 QUESTION HYD
    Posted: 29 Feb 2016 at 12:34pm
LATE MODEL SYSTEM - HAS GEAR PUMP
lift arms drift up - can push them down or stop them with
about 100#'s pressure. At idle they do not raise.
Customer did all the things suggested - spool centered, draft
and position backed off,,,
Somehow we have system back pressure entering the passage
going to lift arms... any ideas?
When told "it's not the money,it's the principle", remember, it's always the money..
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PaulB View Drop Down
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5128 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 29 Feb 2016 at 1:48pm
The traction Booster valve is most likely stuck. It's a common problem with these tractors as the adjustment never get changed enough to keep the valve free, the same for the position control valve.  Have someone move both lever and another look up from underneath. The valve plunger should follow behind the linkage.

Edited by PaulB - 29 Feb 2016 at 1:49pm
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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DiyDave View Drop Down
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 54237 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 29 Feb 2016 at 5:56pm
My D-12 III has the same problem, its in the linkage, if ya try to adjust the TB, something makes it start acting up, so I just leave the TB alone, when using 3 point equip...
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