farmall 200 hydralics

dewy

Member
have two tractors both 200"s...rear lift will pick up 8 disc harrow with old fire hydrant on top ..its heavy,but picks up no problem.....the other tractor will not pickup...only difference in the tractors ,,is no block in front of seat...the lever also doesnt feel as strong or cant feel the positions,,,forward,neutral, back...it does stay pumped up does not leak down like the stronger tractor.that has the block under seat...where to start to get power into lift.......thanks yall,,,,school this boy......dewy
 
(quoted from post at 08:59:08 01/23/15) have two tractors both 200"s...rear lift will pick up 8 disc harrow with old fire hydrant on top ..its heavy,but picks up no problem.....the other tractor will not pickup...only difference in the tractors ,,is no block in front of seat...the lever also doesnt feel as strong or cant feel the positions,,,forward,neutral, back...it does stay pumped up does not leak down like the stronger tractor.that has the block under seat...where to start to get power into lift.......thanks yall,,,,school this boy......dewy
For not picking it up, sounds like maybe the relief valve is low. Best way to check that is with a pressure gauge to see if it's set as high as the one that will pick up more weight.
If I'm not mistaken, that block is a "pilot operated check valve", meaning if you pressure it one way, it opens the return on the other side so the flow will return. Meant to help lock an implement in position and not leak down even if the main valve leaks a little.
 
(quoted from post at 11:29:26 01/23/15) where is relief valve located...
In the Touch Control block. I don't think it's adjustable from the outside. Maybe the only way to "up" the pressure is to shim the relief valve. Also any leakage in the system can do the same thing... never really gets to the relief valve setting. there is a plate that covers most of one end of the block and it's behind that cover. I'm not sure what the system pressure is supposed to be, probably somewhere in the 1200-1500 psi range, but not sure. If you can find a place to plumb in a gauge between the pump and where it goes into the Fast Hitch block and the "deadhead" the pressure by stroking the F-H cylinder to the end of the stroke, that will tell you what it is. Just compare the two tractors... the higher is probably close to right.
 
If you swap the pumps between the two tractors and the problem moves from one tractor to the other, then it must be the pump.
SDE
 
The Touch-Control system has a pressure control circuit that dumps almost all pressure in the system until there is demand from moving a lever. Part of that circuit is a small orifice. If the orifice gets plugged, the system will not build pressure. This part can be accessed by removing a pipe plug in the head (accessible by removing the battery). Pull the plug, then the next two parts, a screen and the orifice, can be unscrewed and cleaned.

I don't know if this part has any effect on the auxiliary valve that is used to control the Fast-Hitch. If this is the problem, the rockshaft arms won't have power to change the angle of the hitch either. If it does have power on the rockshaft, the pump and relief valve aren't the problem either.
 

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