I'm hoping someone who worked on these machines remembers where the drain for the Steering Yoke compartment is. The manual describes leakage from the open center power steering allowed to leak down into this chamber to provide lubrication and overflow returning to the transmission case.
I resealed the steering column a year or two ago and everything was good for about 50 hours but now I find this chamber is being pressurized and blowing the seal out particularly on a right turn. I've pulled the steering column apart and don't see any issue though I will replace the seals again. I believe the source of the oil was the return line port on the right cover - I didn't have a gasket and used silicone which I believe failed where the return flow passes from the transmission case to the cover allowing return oil into the yoke chamber.
I want to ensure the overflow return to the transmission case is not obstructed but I cannot locate it with a mirror and flashlight, pick, mechanics wire or my hands. There is a drain passage from the bottom of the yoke chamber to the right side where there is an external plug but that appears to be just for draining the chamber as I cannot see or feel any other opening in that drilling.
I'm hoping someone like TX Jim will remember where this overflow drain is in the case. I'm concerned that the silicone that blew out may also have blocked the overflow and even with the proper gasket sealing the return passage the intended leakage will eventually overfill the chamber.
"A small amount of this return oil enters the
center cavity of the valve housing through an
orifice in return passage to lubricate the steering
wheel shaft threads and thrust bearings. This
oil at no pressure is allowed to seep downward
through the center of the steering piston rod to
the steering yoke compartment in the clutch
housing. Overflow from this compartment returns
to the transmission case."