Service manual

48H & 49H Locks
7–8 40H Series Service Manual
TROUBLESHOOTING
This table summarizes the possible causes for certain lock problems.
For problems with the core and key, such as difficulty removing or
inserting the key or difficulty turning the key, see the Core and Key
Service Manual.
You notice… Possible causes include… You should…
Deadbolt will not extend. Lock was ordered as an R function. Check the part nomenclature and
ensure the R function is needed for
the application.
Deadbolt will not retract. Handing has been ordered
incorrectly.
Check to ensure the case and thumb
turn cylinder are the correct
handing for the door. If not, order
the correct case and thumb turn
cylinder.
Key will not operate deadbolt. Incorrect cam has been installed. Install cylinder with proper cam
(pg. 7-5).