Best 72KC, Service Manual

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Service and Maintenance
3–12 7KC Series Service Manual
d. From the outside of the door, install the lock chassis assembly.
The outside rose and liner assembly should be flush with the
door. Make sure the latch tabs engage the chassis frame and the
latch tailpiece engages the retractor.
4. Test the lever operation to make sure that the latch tailpiece does
not bind with the chassis retractor.
5. Reinstall the following components:
■ inside rose and liner ( page 3–5 )
■
levers ( page 3–4 ).
T
ROUBLESHOOTING
This table summarizes the possible causes for certain lock problems.
The causes are listed in the order of likelihood. (The most likely cause is
first, and so forth.)
Figure 3.12 Adjusting the outside rose and liner assembly
Outside rose
and liner
Rose locking pin
Hub
You notice… Possible causes include… You should…
Lever won’t return to its normal
position. There is binding between the lever
and rose. Make sure that the lock chassis is
centered within the door
(
page 3–11 ).
Key spins freely, but won’t retract
the latch or unlock the door. Throw member is not installed. Install the throw member.
Core doesn’t fit into the lever core
hole. Keyed lever is defective. Replace the keyed lever ( page 3–2 ).
Button doesn’t pop out as expected. Button retainer is damaged or bent. Replace the button assembly
(
page 3–8 ).
Latch doesn’t retract. a. Latch tailpiece is broken. a. Replace the latch assembly.
b. Latch tailpiece didn’t engage the
retractor correctly during
installation.
b. Reinstall the lock chassis in the
door ( page 3–6 ).