Many implements have a stub shaft with a hole in them for a bolt; smooth shaft no splines; keyed. Some combination of that. Are you _sure_ the implement end has a splined shaft sticking out of it with the notch in it for the balls to lock into????? Are you sure it looks exactly like the tractor pto shaft? (I know some newer implements do come this way....) And no, it is _not_ normal or safe to use it the way it is (not) working for you.... Myself I do not like the ring-lock ends, I prefer the single metal button type. I actually replaced an end on my moco because I hated the ring so much. I would try the shaft the other way to see if that locks in better for you? As you lift & lower the implement it travels in an arc. The shaft will need to extend, retract, & extend again as it moves from all down, to mid height, to all up. Be _very sure_ the shaft does not fully compress itself & is pushing so hard it wrecks something. Most of the time a new shaft needs to be trimmed to fit the thactor the new implement is put on. They often come 'a little too long' to allow for quick hitches, homemade 3pts that are a little out of spec, etc. --->Paul
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