Assa Door Lock User Manual
Rev. A.1, 8/01
Page- 4
FIG. 3: ADJUSTING SPRINGLATCH POSITION
2.5 FINAL ADJUSTMENT WITH SPACERS
For reliable operation, the door needs to close so that the latch easily enters and is retained by
the Mortise UnLatch. The door should not have to be pushed to engage as can be the case
with a poorly fitting or poorly closing door. To check this point, when the Mortise UnLatch has
been mounted, after the door is closed and latched, you should be able to “rattle” the latch
against the Mortise UnLatch plunger by pushing the door in and out. The amount of
movement in the door latch should be about 1/16-1/8” (1.5-3MM).
the Mortise UnLatch. The door should not have to be pushed to engage as can be the case
with a poorly fitting or poorly closing door. To check this point, when the Mortise UnLatch has
been mounted, after the door is closed and latched, you should be able to “rattle” the latch
against the Mortise UnLatch plunger by pushing the door in and out. The amount of
movement in the door latch should be about 1/16-1/8” (1.5-3MM).
If the amount of slack or rattling is greater than 1/16-1/8”, you need the door to “close
earlier”. In effect, the edge of the stop needs to be closer to the Mortise UnLatch. To adjust for
this, first check to see if the stop has “silencers” on it. These are cylindrical rubber bumpers
which quiet the noise of a closing door but also have the effect of making the door close earlier.
If you have silencers and the door is still rattling too much, contact the factory for additional door
stop spacers (the Mortise UnLatch is shipped with two). If you don’t have silencers, add one or
two door stop spacers as is shown in Figure 4 to cause the door to close earlier.
earlier”. In effect, the edge of the stop needs to be closer to the Mortise UnLatch. To adjust for
this, first check to see if the stop has “silencers” on it. These are cylindrical rubber bumpers
which quiet the noise of a closing door but also have the effect of making the door close earlier.
If you have silencers and the door is still rattling too much, contact the factory for additional door
stop spacers (the Mortise UnLatch is shipped with two). If you don’t have silencers, add one or
two door stop spacers as is shown in Figure 4 to cause the door to close earlier.
Remove Small Cover
(Small Phillips Driver)
(Small Phillips Driver)
Remove "U" Shield
(5/64" Allen Wrench)
(5/64" Allen Wrench)
"U" SHIELD
SMALL COVER (A)
SMALL COVER SCREWS (B)
SHIELD SCREWS
(SOCKET HEAD CAP)
(SOCKET HEAD CAP)
Be especially careful not to let a screw or any other object fall
inside the housing as it can jam the Mortise UnLatch
inside the housing as it can jam the Mortise UnLatch
Perform these adjustments
with the unit on a flat surface
and be careful not to lose
the small screws
with the unit on a flat surface
and be careful not to lose
the small screws
Push in Springlatch plunger
and hold it
and hold it
Deadlatch
Fingers
Fingers
Slide Fingers as necessary
(You must push them from
their base; you can use a
small screwdriver)
(You must push them from
their base; you can use a
small screwdriver)
Slide and center springlatch + shield
in the new opening. Then allow it
to spring out.
in the new opening. Then allow it
to spring out.
A-
B-
C-
D-
E-
Replace Shield and Small Cover
F-