Flag angle
3/8”-16
Hex nut
Horizontal
track angle
12” Radius horizontal
track with 3” front cable
lift sheave hole location
Horizontal
track
15”
with 3” or 4”
sheave hole location
or
12”
with 4” front cable lift
sheave hole location
3” or 4”
Front cable
lift sheave
Front cable lift sheave
Attaching Extension Springs
18
Remove the locking pliers from the vertical tracks.
WARNING
WITH ASSISTANCE, RAISE THE DOOR SLOWLY INTO THE OPEN POSITION
MAKING SURE THE DOOR TRAVELS SMOOTHLY THROUGH THE TRACKS.
CLAMP LOCKING PLIERS TO THE BACK LEG OF BOTH HORIZONTAL
TRACKS, BELOW THE BOTTOM TRACK ROLLERS TO KEEP THE DOOR
FROM LOWERING.
Locking
pliers
NOTE: This illustration shows the outside of the door
in the open position.
Bottom
section
Track
roller
WARNING
FAILURE TO INSTALL SPRING RESTRAINT CABLES CAN RESULT IN
SEVERE OR FATAL INJURY IN CASE OF SPRING BREAKAGE.
Position (1) 5/16” - 18 x 3-3/4” eye bolt and (1) 5/16” - 18 hex nut into the rear back hang,
6” to 8” above the horizontal track, as shown. Feed the spring safety cable through the rear
back hang and tie the special knot around the “room side” of the 3 hole clip, as shown.
Secure the eye bolt and 3 hole clip to the rear back hang using (1) 5/16” - 18 hex nut. Hook
one end of the extension spring onto the eye bolt. Feed the spring safety cable through the
rear extension spring loop and center of the extension spring then front spring loop, pull the
spring safety cable taut and tie the special knot around the “jamb side” of the 3 hole clip.
Attach the “jamb side” 3 hole clip to the jamb near the flag angle using (1) 5/16” x 1-5/8” lag
bolt. Repeat the same process for the other side.
NOTE: Some larger doors feature 2 pairs of extension springs. A spring restraint cable must
be installed through each spring.
IMPORTANT: SPRING RESTRAINT CABLES MUST BE TAUT AND EQUALIZED.
Horizontal
track
Back
view
Front view
Spring
restraint cable
5/16” x 1-5/8”
Lag bolt
3 Hole
clip
Special
knot
3 Hole
clip
Rear back
hang
Extension
spring
Spring
restraint
cable
5/16”-18 x 3-3/4”
Eye bolt
Loop
Extension
spring
Extension
spring
Spring restraint
cable
5/16”-18 x 3-3/4”
Eye bolt
Horizontal
track
Back
view
Front view
Spring restraint
cables
5/16” x 1-5/8”
Lag bolt
3 Hole
clip
Special
knot
3 Hole
clip
Rear back
hang
Extension
springs
Spring
restraint
cable
Extension
spring
Spring restraint
cable
5/16”-18 x 3-3/4”
Eye bolt
5/16”-18 x 3-3/4”
Eye bolt
Special
knot
3 Hole
clip
Rear
back
hang
cable
Special
knot
5/16”-18 x 3-3/4”
Eye bolt
5/16”-18
Hex nut
Extension
spring
Horizontal track
5/16”-18
Hex nut
Horizontal track
5/16”-18
Hex nut
6”-8”
Attaching Spring Sheaves
19
IF YOU HAVE ONE PAIR OF EXTENSION SPRINGS: Hook the sheave fork through the front
loop of the extension spring and attach the sheave fork to the rear cable lift sheave using (1)
3/8” - 16 x 1-1/4” hex head bolt and (1) 3/8” - 16 hex nut. Thread the counterbalance lift
cable over the front cable lift sheave and around the rear cable lift sheave and tie the special
knot around the “horizontal angle” using a 3 hole clip, as shown. Insert one end of the small
“S” hook into the “horizontal angle” with the 3 hole clip and the other end into the second
slot of the horizontal angle, as shown. Repeat for the other side.
Sheave fork
Extension spring
Rear cable
lift sheave
Spring
restraint
cable
3 Hole clip
Special
knot
Counterbalance
lift cable
Small
“S” hook
3/8”-16 x 1-1/4”
Hex head bolt
3/8” - 16
Hex nut
Sheave fork
Extension spring
Rear cable
lift sheave
Small
“S” hook
Horizontal
track
Rear back hang
Extension
spring
NOTE: Some larger doors feature 2 pairs of extension springs. A spring restraint cable must
be installed through each spring.
IF YOU HAVE TWO PAIR OF EXTENSION SPRINGS: Insert two large “S” hooks and the
sheave fork into the hook plate. Attach the sheave fork to the rear cable lift sheave using (1)
3/8” - 16 x 1-1/4” hex head bolt and (1) 3/8” - 16 hex nut. Thread the counterbalance lift
cable over the front cable lift sheave and around the rear cable lift sheave and tie the special
12
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