Guys, this isn't Feral's problem, but I think it is some of yours.
These really do work pretty well, most are a one man operation. (unless it's cold out, then they don't slide)
I change out 3 point stuff at least once a day in the spring and fall, sometimes a couple times a day. From 5' equipment to 15' equipment.
If your PTO collar takes a hammer to get on or off it's broken. Get a new head put on it, or fix it. The button ones are esp prone to break. (the spring inside the button gets jammed up)
A lot of times this is caused by shafts that are too long and put all the pressure on the head when the implement is up.
Make sure you aren't bottoming out the shaft, it should always have some room in it.
Lube the splines and keep them clean, lube the U joint every 25 hours or so, lube the shaft itself.
all with good grease.
If it still doesn't work, it's fucked up, go get another one, pretty darn cheap on Cat 1 hookups (5', 6' equipment)