Quote Originally Posted by Pschiffe View Post
Your installation is unusual in that the lock face doesn't appear to extend for the full thickness of the door. I'm guessing that perhaps the lock was made for a 1-3/4" door but that yours is 2-1/4" thick? The finish carpenter may have modified the cutout to accommodate the lock he had on hand. The pdf template at the link shows a typical unit lock door cutout:
https://extranet.assaabloydss.com/li...pdf/T30495.PDF
Your lock should definitely be repairable although it is possible that parts might need to be custom fabricated if extremely worn or broken. It might also only need cleaning, lubrication or spring(s) replacement. In any event, I would leave the repair to an experienced locksmith as these mechanisms can be rather complex.

Pete Schifferli
Pete and Timothy: Thanks for the replies!

The lock was lubricated by the locksmith - but I don't know how far he took it apart.
The door is 1 3/4" thick, the latch/lock mechanism is 1 7/8" wide. Other Sargent Union lock images I've found online seem to be installed in a similar fashion. Note: http://ogtstore.com/architectural/ha...nze-unit-lock/

The search is on for an elder locksmith willing to tackle this project.