Torsion shaft /
Torsion keyed shaft
Right wound, red
winding cone
(left hand side)
Left wound, black
winding cone
(right hand side)
Right hand
cable drum,
black
Left hand cable
drum, red
IMPORTANT:
ON SINGLE
SPRING APPLICATIONS,
ONLY A LEFT WOUND
(BLACK WINDING CONE),
IS REQUIRED.
NOTE:
Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
Center
bracket
bearing
With assistance, pick up the torsion spring assembly and slide one end of the torsion shaft
/ torsion keyed shaft through one end bearing bracket. Lay the middle of the torsion shaft /
torsion keyed shaft into the center bracket. Slide the other end of the torsion shaft / torsion
keyed shaft into the other end bearing bracket.
Left hand end
bearing bracket
Right hand end
bearing bracket
Center
bracket
bearing
Center bracket
Torsion shaft /
Torsion keyed shaft
NOTE:
Position the torsion shaft so that equal amounts of the shaft extend from each end
bearing bracket.
IF YOU HAVE A COUPLER ASSEMBLY:
Disassemble the coupler assembly by removing
the (3) 3/8” - 16 x 1-1/2” hex head screws, (6) 3/8” washers, (3) 3/8” lock washers and the
(3) 3/8” - 16 hex nuts from the coupler halves. Loosen the set screws. Set the components
aside.
Coupler assembly
(3) 3/8” - 16 x 1-1/2”
hex head screws
(3) 3/8” - 16
Hex nuts
(3) 3/8”
Washers
(3) 3/8”
Washers
(3) 3/8” Lock
washers
Coupler halves
Set screws
Set screws
Facing the inside of the door, lay the (2) torsion keyed shafts on the floor. One torsion keyed
shaft on the left hand side and the other torsion keyed shaft on the right hand side. Starting
on the left hand side, lay one of the coupler halves, the center bracket bearing, torsion spring
with the red winding cone and the red cable drum at the left end of the torsion keyed shaft.
Next on the right hand side, lay the other coupler half, center bracket bearing, the torsion
spring with the black winding cone, and the black cable drum at the right end of the torsion
keyed shaft. Slide the coupler halves, center bracket bearings onto the torsion keyed shafts
followed by the torsion springs and the cable drums, as shown.
IMPORTANT:
THE COUPLER HALVES, CENTER BRACKET BEARINGS, TORSION SPRINGS,
CABLE DRUMS MUST BE POSITIONED, AS SHOWN.
Slide the flat edge of the couple half flush with the side edge of the torsion keyed shaft. Insert
(1) key into the slot of both the coupler half and the slot in the torsion keyed shaft. Tighten
the (2) set screws and the locking nut to secure the coupler half to the torsion keyed shaft,
as shown.
NOTE:
Tighten the set screws to 14-15 ft. lbs. of torque (once set screws contact the shaft,
tighten set screws one full turn). Repeat the same process for the other coupler half.
NOTE:
Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
Torsion
keyed
shaft
Center
bracket
bearing
Coupler
halves
Coupler halves
assembled
Set screws
and Lock nut
Key
Key
Torsion keyed shaft
Right wound, red
winding cone
(left hand side)
Left wound, black
winding cone
(right hand side)
Left hand cable
drum, red
Right hand cable
drum, black
Center
bracket
bearing
Torsion keyed shaft
Center bracket
bearing
Red cable drum
(left hand side)
Black cable drum
(right hand side)
Center bracket
bearings
Coupler
halves
Coupler halves
assembled
Set screws
and Lock nut
Key
Key
Torsion keyed shaft
Right wound, red
winding cone
(left hand side)
Left wound, black
winding cone
(right hand side)
Center bracket
bearing
NOTE:
Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
With assistance and starting on the left hand side of door, pick up the left hand torsion spring
assembly and slide one end of the torsion keyed shaft through the end bearing bracket. Lay
the other side of the torsion keyed shaft into the center bracket. Repeat the same process for
the right hand torsion spring assembly.
Torsion
keyed
shaft
Center bracket
bearing
Coupler
half
Center bearing
brackets
Left hand end
bearing bracket
Right
hand end
bearing
bracket
Torsion
keyed
shaft
Right wound, red
winding cone (left
hand side)
Center
bracket
bearing
Center bracket
Torsion keyed shafts
Right hand end
bearing bracket
Left hand end
bearing bracket
NOTE:
Position both torsion keyed shafts so that equal amounts of the shafts extend from
each end bearing brackets.
Attaching Springs to Center Bracket
19
NOTE:
Refer to Package Contents / Breakdown of Parts, to determine which Center
Bracket(s) came with your door.
15
Summary of Contents for 8100
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