MF 175 lift arms immediately raise

Army Tim

New User
I recently removed a two valve auxiliary hydraulic control and put the original hydraulic cover plate back on. I did this so I could use my lift control and draft control. Before only the lift would work with the valve. I replace the o-rings in on stem pipe put the plate back on and started the Tractor the lift arms immediately went up. Any help would be greatly appreciated.
 
The control spool may be stuck. Take the lower bolts out of the round cover near your right foot and drain the oil to that level. Remove cover, observing that the response spring/plunger doesn't get away.

Observe the linkage with the roller, move the lift lever (engine at idle) to see if the spool follows the roller in/out. The spool did stick on my 150, but just once.

If the spool follows the roller/linkage, then it may need an adjustment of the linkage. That's trickie and the lift cover will have to come off. I'm not much help with that part of these tractors.
a199394.jpg
 
Hey Army Tim,
Just went through the same problem with my 165. When I bought it, the p.o. told me he had removed the lift cover and replaced some springs. I doubt that, but anyway here's what I found.
When I pulled the right side cover off, (I had already drained all the milky oil out of it), I found out that all the control valve linkage was missing, I mean the lever, roller, lower pin and rollers, everything!! For about $35.00, I ordered all the pieces, and after some choice words, got the little pin and rollers in the control valve plunger, got the linkage piece in place and attached. I too, removed my two spool remotes because I have no use for them right now. I also removed the top cover to check the adjustments, they were off a bit, but not bad. Got the top cover installed yesterday, added about 4 gallons of hyd oil, and now my lift operates using the draft and position control.
FYI, that top cover weighs somewhere around 200lbs, give or take. I had to use my FEL and a 1000lb come along to get it off, then me and my neighbor nearly split a gut getting it in the shop...
From the picture the other member posted, about in the middle bottom, you'll see the control valve lever, also notice the two holes in the lever, that's where the roller goes. The control valve is spring loaded and defaults to the closed position, thereby causing the pump to be constantly supplying pressure to the lift cylinder. when you move the draft and or the position levers down, they open the valve to allow the oil to exhaust.
If your oil is not milky, pull the bottom bolt from the right side cover, as you're sitting on the tractor, drain the oil to that level, pull the cover, and take a look see to determine what you may need. Post pictures if you aren't quite sure, and we'll be glad to help out..

Roger
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top