BEST 9K Series Service Manual - Locksmith Security Association of ...

Service and MaintenanceTROUBLESHOOTINGThis table summarizes the possible causes for certain lock questions.The causes are listed in the order of likelihood. (The most likely cause isfirst, and so forth.)You notice… Possible causes include… You should…Lever won’t return to its normalposition.Key spins freely, but won’t retractthe latch or unlock the door.Core doesn’t fit into the lever corehole.a. Lever return spring is out ofposition.a. Reposition the lever return spring(pg. 3-10). Replace the springdrive plate, if damaged (pg. 3-15).b. Lever return spring is broken. b. Replace the lever return spring(pg. 3-10).c. There is binding between thelever and rose.c. Ensure that the lock chassis iscentered within the door(pg. 3-19).a. Throw member is not installed. a. Install the throw member.b. 6-pin core is installed with a 7-pinthrow member.a. 7- pin core is installed with a6-pin throw member.b. Change the core or throwmember.a. Change the core or throwmember.b. Keyed lever is defective. b. Replace the keyed lever (pg. 3-3).Button doesn’t pop out as expected. Button shaft is damaged or bent. Replace the button assembly(pg. 3-7).Latch doesn’t retract. a. Latch tailpiece is broken. a. Replace the latch assembly.For a C function lock, the inside keydoes not rotate the full 360°, and theoutside key does not rotate the full135°.For a G or IN function lock withlevers in the locked position, the keydoes not rotate one full turn in bothdirections.Cannot remove the operating keyfrom an H or HJ function lock.b. Latch tailpiece didn’t engage theretractor correctly duringinstallation.b. Reinstall the lock chassis(pg. 3-5).Inside locking cam is out of position. Reposition the inside locking cam(pg. 3-20).Locking cam is out of position.Key is turned 180° past the correctposition.Reposition the locking cam(pg. 3-20).Push the inside button, turn the keyback clockwise 180°, and removethe key.9K Series Service Manual 3–23