D4E Steering Problems

The steering clutch lever needs to get to the fully returned position in order to cut off oil pressure/flow to the yoke cylinders. When the handle is released and the oil pressure to the yoke cylinder is stopped, the steering clutch springs pull the yoke assembly back to the engaged position.
Things to check:
1. Adjustment and movement of the steering control linkage.
2. Too much leakage in the steering clutch control valve.
3. Steering clutch discs or plate wear.
4. Weak clutch springs.
5. Seals or steering clutch piston wear.

Maybe Bob/Ont. will pick up and comment. He's the expert on the later stuff.

Took some digging to find the oil pump specs. It is a two section pump, one section is the scavenge pump for the clutch and the other section is the pressure pump which should put out 500 psi @ 2,000 rpm (pump rpm) and 8.5 gpm.

Might be a good idea to check pump pressure.
The minimum pressure needed to operate the steering clutches is 230 psi.

Couldn't find the relief valve pressure setting other than a 1.19 in length with a test force of 51 lbs. and a free length of 2.23 in.

Thanks Old Magnet

We are going to check the pump pressure, but first we were going to replace filter and clean the screen. May even replace fluid, although looks fine.

We are also going to reset both linkage (right and Left) to see if that solves the problem. While rebuilding the control valve, we removed the cover to the yoke cylinders and checked the linkage length for each and they seemed to be fine.

After we had rebuilt the control valve, we thought that the control valve linkage may very well be the problem. but wanted to have an experts advice.

The tractor has to be in the shop anyway, for the right track adjuster needs the seals replaced.