The Atrium Lock Tumbler for dead bolt not working properily

Question

Looks like a 82-400 lock set. door approx. 40 yr. old. Not sure how to disassemble lock. Don't want to destroy lock, still working with problems.
Seems dead bolt stripping out.

Dave Sr. · Accepted Answer

To remove the handle from the door, you will need to take off the lever handle using a 3/32" Allen key. Next, you will need to remove the key cylinder by taking the set screw out from the edge of the latch. With the handle and the cylinder removed you should then be able to take the handle out of the door by removing the mounting screws.