140 farmall touch control

Mel Thomas · May 14, 2011

When you move the touch control levers the pressure is susposed to be around 1500 PSI which mine is.But the pressure stays high and the oil heats up rapidily and the motor is still under load.The main filter is ok as is the little filter in side the unit itself.The pressure relief valve seems to be ok but maybe there is something internally stuck.The blue ribbon touch control book is almost but not quite useless.Talks about the problem but doesn't offer any cure in detail.I had this same question on here a couple of weeks ago and got some good repley but I still have the problem.Any help would be greatly appreciated.The pressure just isn't dropping back at the end of the lever travel,thus the hot oil

Janicholson · May 14, 2011

THere is an adjustment that puts the position of the rock shaft at the limit when the lever is at the limit. If this is not correct, the valve continues to put pressure to the cylinder. (My best guess on the issue) Jim

pete 23 · May 14, 2011

Try this. First off I am going to assume your system stays on pressure even though your levers are not to their extreme movements. There is a pipe plug(1/8 th inch I believe) on the back side of the touch control box. Under that plug is a screwdriver slotted screened orfice. This orfice supplies the unloading valve oil to move it to a regulated unloaded low pressure neutral position. If plugged system will stay on demand.

Mel Thomas · May 14, 2011

Pete 23:Thanks for the reply.I have already tried that and it didn't make any difference.When you move the levers and stop say in the middle of the quadrent the pressure stays loaded;actually where ever the levers stop the pressure stays loaded.

NawlensGator · May 15, 2011

I had a somewhat similar problem with a 140. The linkages on the front cultivator arms were rusted up so tight it kept a strain on the hydraulics. I took the linkages apart, clean everything, greased everything, and reassembled. That solved the problem. Maybe some really tight/rusted joints (just guessing).

pete 23 · May 15, 2011

If the orfice is clean, unrestricted and it stays on pressure with lever in any positon like you say and arms are moving like they should, then you are going to have to take the unit apart and get at the unloading valve inside. Made darn sure that orfice is open though, cut end of screen off so you can clean it good and just wrap it back up to close screen. If jiggling those levers back and forth a little allows you to come off pressure then the problem may well be stick lever, I doubt it though.

140 farmall touch control

Mel Thomas

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Janicholson

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pete 23

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Mel Thomas

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NawlensGator

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pete 23

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