Rev. A.1, 8/01 | Page- 3 |
lines and knowledge of the gap between the springlatch and deadlatch pin are used to determine the vertical position of the springlatch plunger. When this gap is greater than ¼”, best reliability is obtained when the springlatch plunger position is centered on the springlatch. When the gap is smaller than ¼”, however, simply centering the springlatch plunger risks positioning the deadlatch pin too close to the springlatch plunger so the procedure is to position the edge of the springlatch plunger midway between the springlatch and deadlatch pin. Figure 2 illustrates these points.
FIG. 2: DETERMINING POSITION OF SPRINGLATCH PLUNGER
SPRINGLATCH
MEASURE GAP 
BETWEEN SPRINGLATCH AND DEADLATCH PIN 
DEADLATCH PIN (MAY BE ABOVE)
GREATER THAN 1/4" GAP
DRAW LINES ON MORTISE UNLATCH DENOTING TOP AND BOTTOM OF SPRINGLATCH
CURVED LIP OF
MORTISE UNLATCH
EXAMPLE OF SPRINGLATCH
PLUNGER CENTERED WITH
RESPECT TO SPRINGLATCH
POSITION (SHOWN BY
DRAWN LINES). THE PLUNGER
SHOULD BE CENTERED WHEN THE GAP BETWEEN THE SPRINGLATCH AND DEADLATCH PIN IS GREATER THAN 1/4"
GAP BETWEEN DOOR AND FRAME
SPRINGLATCH PLUNGER 
LESS THAN 1/4" GAP
WHEN THE GAP BETWEEN THE SPRINGLATCH AND DEADLATCH PIN IS LESS THAN 1/4", SET THE BOTTOM EDGE OF THE SPRINGLATCH PLUNGER MIDWAY BETWEEN THE SPRINGLATCH AND DEADLATCH PIN. (NOTE THAT THE DEADLATCH PIN MAY BE BELOW THE SPRINGLATCH AS IN THIS EXAMPLE, OR ABOVE IT)
SPRINGLATCH BOTTOM EDGE (EXAMPLE) DEADLATCH PIN TOP EDGE (EXAMPLE) MIDWAY POSITION
2.4.2 ADJUSTING SPRINGLATCH POSITION
Now that you have marked the unit with the correct position for the springlatch plunger, the actual adjustment must be performed. Figure 3 shows the procedure.
