I know the set screw you are describing Paul, and I have loosened that, and then tried to maneuver the U yoke back and away from the output shaft, but so far with no success. It has probably been there a long time and may take more than twist wiggle and pull to loosen it enough to get the yoke backed away. I have stopped short of tapping on it, just because it is still attached to the other end which goes into the hydraulic drive. Will just keep trying and try not to screw anything up.It sounds like you are describing exactly what I am seeing. Is the slip joint the other set of universals with a square bar shaft just aft of that center bearing? I did loosen the set screw on that universal also, but still can't get the front u yoke to move back that way. Seems like that drive line is pretty tightly bonded in those u yokes.The center bearing moves nicely. This does appear to be all original but you are right, who ever knows for sure unless you bought it new. Thanks for your help Paul, any suggestions on how to break the bond without messing anything up would be great, but in the meantime I will just keep trying.

Dale