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Will, if the tractor is parked outside & the temperature is below freezing maybe you have ice in the PTO clutch housing. ~If ice doesn't seem like a likely cause, start by looking at the PTO pedal assembly. Look closely for the pin in the pedal assembly to be hanging up in the notch in the slotted plate assembly. If the pedal assembly appears to be working, see if you can stop the PTO shaft from turning by using your foot & holding the lower PTO pedal down hard, [if so you need a PTO rod length adjustment]... Shorten the rod with the clevis to increase the brake hold. ~It might not hurt to do a PTO clutch adjustment but if it was working a while ago that doesn't seem like a likely cause of the pedal not moving now. ~If the pedal appears to be functional & it still won't move to engage the PTO clutch, remove the clevis at the PTO shaft lever that is sticking out of the R/H side of the rear PTO housing & see if the pedal will move then, [if not, your problem is pedal or lock plate related]. If the pedal moves with the clevis disconnected your problem is inside the rear PTO housing. If the clevis pin is rusted & frozen so it won't move you might have found your problem. ~If the problem is inside the rear PTO housing you will have to pull it apart to see what's wrong inside. Start by draining the PTO oil & smelling it, if it smells like trans gear oil [a distinct smell] you are in for a big job that requires removing the whole rear housing assembly. If no gear oil is present then you probably have an adjustment problem, or failed parts like sliding collar, fork, worn plates, or cam & balls. ~By your text above you seem a little intimidated by the service manual & PTO internal operation. While that PTO isn't that difficult to work on it can be a difficult repair if you don't FULLY understand it's operation, internal parts function & adjustment options. I sent you a picture of the internal PTO clutch pack & brake assembly [I have one apart as we speak]. You can do this repair yourself but MUST read the manual & ask questions until you fully understand how it operates, how the clutch is adjusted, what the adjustments change, & why they need to be changed. If you find gear oil in the PTO housing you will need the lifting ability & tools to pull the very heavy rear housing completely off the tractor. ~I have more pictures so first determine if you have gear oil in the PTO housing, if so post back or E-Mail & we can tell you what is probably going to be involved with the repair..... ~Tyler covered the PTO drive gear shifter [if you can't find it let me know & I will send a picture]..It does have one it just doesn't look like the gasoline tractors.
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