The lock is held in with a small pin - and I'd be real cautious about taking the key barrel out of the lock housing. I'm not 100% sure if the tumblers are retained in the turn barrel or if the casing holds them in place. You might be doing a field trip to a junk yard and buying one to do an autopsy on it. Better to find out with a spare than the only one you have. And if it works out you can pull the key barrel out and swap it onto your JY column lock. Good luck with ironing this one out ratesheet