8
Step 6
Install the included
1
/4" insert bit (or a
7
/16" socket)
in a medium duty drill: 1000-2500 RPM, (2-4 AMP)
variable-speed and reversible. Set the drill to
FORWARD (clockwise as you point the drill away
from you). Keep this drill and a
3
/16" hex key handy
for Steps 8 and 9.
If the stripe on each spring is not facing toward
you as shown in Figure 12, engage the drill with the
1
/4" insert bit (or
7
/16" socket) into drive shaft of the
winding unit to rotate the spring until the stripe is
facing you. (FIG. 12)
NOTE: The
1
/4" insert bit shown in Figure 12
is secured in a drill chuck, but the drill is not
shown.
IMPORTANT!
Step 7
Holding the tube in place, measure and adjust
the length of the spring to match the length you
recorded in Figure 5.
NOTE: THIS LENGTH SHOULD NOT BE LESS THAN
THE RECORDED LENGTH AND SHOULD NOT
EXCEED LENGTH BY MORE THAN 1/2"
DO NOT OVERSTRETCH SPRING(S) BEFORE
TIGHTENING SET SCREWS.
Overstretching the
springs could cause the loss of spring tension
and possibly allow the door to fall. The length
of the spring on the shaft should NOT exceed
the relaxed spring length recorded in Step 3
on page 4 of the EZ - SET
®
Torsion Spring
System Instructions by more than 1/2" max.
NOTE: Be sure to hold the tube in position after
you have tightened the spring set screws. Any
sliding of the tube from this point on will affect
the length of the springs.
Tighten both set screws in the set cone to the tor-
sion tube. Use a
3
/8" wrench if the springs are sup-
plied with square head set screws as shown
in Figure 13, View A. Use a
3
/16" hex wrench if sup-
plied with internal set screws as shown in Figure 13,
View B. CAUTION: When resistance is encountered
while tightening the set screw, the screw has made
contact with the tube. Set screws should be turned
from
3
/4 to one full turn after they have made
contact with the tube. Additional turns may damage
the tube.
Fig. 13
View B
set cone shown with
internal set screws
View A
set cone shown with
square head set screws
External Set
Screws
Torsion Spring
Set Cone
Torsion
Tube
Internal Set
Screws
Torsion Spring
Set Cone
Torsion
Tube
Fig. 12
If you have a door with two springs, repeat the
above procedure for the right side spring.
Clockwise
Winding
Direction
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