I have a '79 316 tractor that the PTO was working.
When I start the tractor, and then turn on the PTO switch, it stalls out engine.
I have taken off the belt that goes around the PTO and back to the mower deck. With nothing drawing demand from the front PTO pulley. My dad watched from the front, and said it barley move while I engaged the switch, and he could stop it from turning by lightly touching it with a broom handle.
Story starts that my wife was mowing and game back to get more gas, during the startup process when she switched the PTO then stalls started, and continued to occur. When I when to examine the adjustment knob on the front. IT WAS GONE... One of two things could of happened. One the black knob fell off while mowing. Second and most logical, is that my 3yr old son took it off.
While trying to just rig a temporary fix with some coat hanger through the front hole, and bolting the wire so it would not slip back. I found something that blew me away..
The pulley on the right side(standing at the front) of the tractor, I saw that the pulley had eaten through 3/8" of metal from the suspension bar going from the engine to front tire. see attached photo. I can imaging how long it was doing this to eat that far through metal. That I fixed by getting the pulley away from it, but now PTO still stalls engine.
Please let me know what you think to do next...