Ford 4000 with SOS and PTO problem

But along with that it appears that the Transmission fluid is being pumped/transferred (???) into the hydraulic fluid reservoir. The transmission fluid gets lower and shifting becomes a problem. In addition the fluid in the hydraulic reservoir increases to the extent that it leaks out of the (Hydro) dip stick hole. I have to drain some out and put it in the transmission case.

How do you stop the PTO shaft from turning and/or properly adjust the PTO cable?

One other thing. I fished out the wire that is supposed to be attached to the PTO switch in the hydraulic reservoir. The book says this is supposed to be attached to a red light on the dash and light up if the PTO shift cable is not adjusted correctly. I have hooked it up to a voltmeter with no results whether the cable handle is in or out and the PTO engaged or not engaged. I have a bad switch, I guess.

Thanks for the help.

As to the oil transfer, one or both output shaft seals are leaking. Split tractor behind transmission to replace.

As to this switch and wire, it is not a PTO switch, it is a low lube light. It is designed to light up if you have low lube pressure. When testing the switch, you should have continuity to ground with the engine off, and no continuity with the engine running. This is simply a grounding circuit, there will be no voltage present.