The steering been great for a couple of days but notice the right side was getting hard to push on the right steering pedal and then after another hour maybe it stop disengaging the clutch first I was thinking it had to do with oil was warm a thinner and leaking  around something and not building enough pressure to disengage the clutch.

Look at the part book I think oil pressure is on the clutch the to engage while driving and cut off and the brake is push to turn the machine. (so no oil flow no pressure on the clutch plates?) So I think it dirt? Since I had a bad input line to the oil pump on the machine a week or two ago , dirt  or something jaming  the control valve to shut off oil to the clutch piston? Question doesn't the oil go thru the filter first and then to the valves? I'm new to these machines or any of these big machines but it would be the way I would of made them if I design the machine. so let me know If i'm in the ball park.

My guess is that I should be able to get to what is jamming the oil flow valve by a plug on the valve body?  and no need to pull the whole valve off, if I'm  luckly. clean it out and on my way??? another thing I don't think it a o-ring on the valve don't see one on the parts list. looks like the level pushes on a valve pin with a spring on it just incase something jams it to keep it from bending.  

 Thanks  for any replys for some insight

Robert

 I had bolts stretch and shear off in clutch housing allowing oil to escape - new bolts and new O ring and back to work. 

 Valve body to control this was located under seat area on FD5 machine .