9
Step 8
NOTE: Be careful not to shift the tube left or
right during this step as this will disturb the
gap set in the spring(s).
Starting with the left side, pull the lift cable up from
the safety bottom bracket behind the rollers and
inside of the jamb brackets. bring it between the
legs of the bracket and behind the drum and insert
the cable lug into the drum slot. (FIG. 14, VIEWS
A & B) Make sure that both set screws are flush or
below the surface of the cable grooves
BEfORE
securing the drum. Take up the cable slack by
turning the drum by hand. Make sure the cable is
pulled tightly into the drum grooves and the drum
is against the bearing in the winding unit, then
tighten the most accessible set screw in the drum
(only one of two need to be tightened) using a
3
/
16
" hex wrench.
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. While maintaining cable
tension, use the drill (turning clockwise as in
Figure 1) to wind the spring 1 or turns. The
spring tension will maintain the proper cable ten-
sion when you let go.
go to the right side to secure the right side drum.
pull the cable up between the legs of the bracket,
insert the cable lug in the drum slot, and take up
the cable slack by turning the drum. before secur-
ing the right side drum, pull the tube toward the
right side to make sure there is no gap between
the left drum and left bearing. Slide the right drum
against the right bearing and secure the drum.
There should be
1
/
16
" maximum gap between the
drums and the bearings on each side. Tighten the
most accessible set screw down to secure the
right drum using a
3
/
16
" hex wrench.
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.
NOTE: Verify that the drum marked with the
letter “l” is on the left side (fIG. 14, VIEW A)
and the drum marked with the letter “R” is on
the right side. (fIG. 14, VIEW B)
fig. 14
VIEW B
RIGhT SIdE ShOWN
VIEW A
lEfT SIdE ShOWN
Cable lug
letter “l”
drum Slot
drum Slot
Cable
lug
letter “R”
Set Screw
location
