1970 180 PTO Will not engage.

No split if you go about it right. So, the groove pin has worked out of its hole. Not common at all, but obviously has happened. Remove the cover and oil manifold on the right side where the brake latch pawl hangs from. You might want to unbolt the right platform and remove or at least lift it up higher. Let the brake pedals fall forward after unhooking rods and springs to get them out of the way. Looking inside with a good flashlite you will see what's going on. If the pin is missing, you need to get in there with a magnet and FIND IT !! before it runs thru any PTO gears. Maybe use a small mirror to hunt it down. I would replace the pin with a 5/16" grade 5 or 8 bolt about 2+ inches long and a locknut. Using an air ratchet (with a 1/2" wrench) the nut can be tightened up and you are fixed. There are oil tubes in the way and with an assortment of wrenches they can be moved around. Using a bolt it will be easier than trying to align and press that OEM pin back in place. This isn't easy, but easier than a split, because all the parts you remove to gain access must be removed anyway for a split.

I took the fittings and cover off the right side of the tractor.  I can see the coupling and the pawl or what ever the device is called that moves coupling.  I cannot get the pawl to move.  Did not get real rough with it.  Is there a ball bearing or something on the end of the clutch pin to hold it in place?  Or does it look like it traveled too far and should be on the backside of the clutch pin.  Towards the back of the tractor.  Thank you for your help.

Thank you.