Thanks Max, I think I may have worked it out but didn't supply you with sufficient information to come to a similar conclusion. The split sleeve which is inside the cutter bar hub is threaded and there is a nut located inside the cutter bar. The sleeve was/is probably tapered (I do not have the eyesight or the tools to confirm this) so when you tighten the nut it clamps the cutter bar onto the drive shaft, and the cutter bar onto the sleeve. Only a guess and however it is meant to work it was probably not very successful as they went to grub screws in later models. I think the sleeve would also give you an additional clutch mechanism, (the housing is not keyed it is just the split in the sleeve), so I have opted against drilling and tapping a grub screw and gone for drilling through the cutter bar and putting a bolt in the end of the crankshaft. As I know I am a poor communicator so I hope the photos will make it clearer. Again thanks for your help Regards Randy
If I can get a large enough hammer it will run for awhile just trying to get away from me
