That would be the old CP made in the USA not the rebirth CP name made in Chyna. IR compressors included now Chyna rubbish. I paid $473 for a CP air chisel 37 years ago, it still kicks **** able to destroy anything given a little time. Compressors also now imports vs the 5 Hp Saylor Beall with pressure lubed pump head, 2 stage 17.6 CFM still proudly made in America. It will outlive me and my son.“Do you mean do not disengage the shaft totally from the knuckle, or make sure the other end of the shaft does not disengage? I think the latter?”
Yes the latter.
with regards to the air hammer. It’ll be the best 80 bucks you spend for that job. Literally takes seconds to push out the drive shaft with no damage.