Torsion
shaft
Left wound, black winding
cone (left hand side)
Right wound, red
winding cone
(right hand side)
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.
Set collar (if
applicable)
Set collar (if
applicable)
Set collar (if
applicable)
Set collar (if
applicable)
Center
bearing
bracket
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. Position the torsion shaft / torsion keyed shaft
so that equal amounts of the shaft extend from each end bearing bracket.
Left
hand
end
bearing
bracket
Center
bracket
Torsion spring
assembly
Right hand end
bearing bracket
Torsion spring
assembly
Center
bearing
bracket
Or
Torsion
shaft
Right hand end
bearing bracket
NOTE:
Position the
torsion shaft so that
equal amounts of the
shaft extend from each
end bearing bracket.
Torsion
shaft
Left hand end
bearing bracket
IF YOU HAVE A COUPLER ASSEMBLY:
Disassemble the coupler assembly by removing the
(3) 3/8” - 16 x 1-3/4” hex head screws and the (3) 3/8” - 16 nylon hex lock nuts from the
coupler halves. Loosen the set screws. Set the components aside.
(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 bearing, torsion spring with
the black winding cone and one set collar at the left end of the torsion keyed shaft. Next on
the right hand side, lay the other coupler half, center bearing, the torsion spring with the red
winding cone and one set collar at the right end of the torsion keyed shaft. Slide the coupler
halves, center bearings onto the torsion keyed shafts followed by the torsion springs and the
set collars, as shown.
IMPORTANT:
THE COUPLER HALVES, CENTER BEARINGS, TORSION SPRINGS AND THE SET
COLLARS MUST BE POSITIONED, AS SHOWN.
Slide the flat edge of the coupler 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.
Torsion
keyed
shaft
Center
bearing
Center
bearing
Coupler
halves
Coupler halves
assembled
Set screws
and Lock nut
Key
Key
Torsion keyed shaft
Left wound, black
winding cone (left
hand side)
Right wound, red
winding cone (right
hand side)
Set collar
Set collar
Torsion keyed shaft
Center
bearing
Center
bearing
Coupler
halves
Coupler halves
assembled
Set screws
and Lock nut
Key
Key
Torsion keyed shaft
Left wound, black
winding cone (left
hand side)
Right wound,
red winding cone
(right hand side)
Center bearing
Set
collar
Set
collar
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. Position both torsion keyed shafts so that equal
amounts of the shafts extend from each end bearing brackets.
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