Wayne-Dalton 7400 Series Installation Instructions And Owner's Manual page 15

NOTE: Refer to the Package Contents and or Breakdown of Parts to determine if your door
came with a coupler assembly.
IMPORTANT: RIGHT AND LEFT HAND IS ALWAYS DETERMINED FROM INSIDE THE BUILDING
LOOKING OUT.
IMPORTANT: IDENTIFY THE TORSION SPRINGS PROVIDED AS EITHER RIGHT WOUND (RED
WINDING CONE), WHICH GOES ON THE LEFT HAND SIDE OR LEFT WOUND (BLACK WINDING
CONE), WHICH GOES ON THE RIGHT HAND SIDE.
IMPORTANT: ON SINGLE SPRING APPLICATIONS, ONLY A LEFT WOUND (BLACK WINDING
CONE), IS REQUIRED.
NOTE: The set screws used on all winding cones and cable drums are colored red. DO NOT
identify right and left hand by the set screw color.
IF YOU DON'T HAVE A COUPLER ASSEMBLY: Facing the inside of the door, lay the torsion
shaft / torsion keyed shaft on the floor. Lay the torsion spring with the black winding cone
and the black cable drum at the right end of the torsion shaft / torsion keyed shaft. Lay the
torsion spring with the red winding cone and the red cable drum at the left end of the torsion
shaft / torsion keyed shaft. Slide the center bracket bearing onto the torsion shaft / torsion
keyed shaft followed by the torsion springs and cable drums.
IMPORTANT: THE CENTER BRACKET BEARING, TORSION SPRINGS, AND CABLE DRUMS
MUST BE POSITIONED, AS SHOWN.
NOTE: Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
Torsion shaft /
Torsion keyed shaft
Left hand cable
drum, red
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.
NOTE: Position the torsion shaft so that equal amounts of the shaft extend from each end
bearing bracket.
Left hand end
bearing bracket
Torsion shaft /
Torsion keyed shaft
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
Set screws
(3) 3/8" - 16 x 1-1/2"
hex head 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
Right hand
cable drum,
Left wound, black
winding cone
Center
(right hand side)
bracket
bearing
IMPORTANT: ON SINGLE
Right wound, red
SPRING APPLICATIONS,
winding cone
ONLY A LEFT WOUND
(left hand side)
(BLACK WINDING CONE),
IS REQUIRED.
Center
Right hand end
bracket
bearing bracket
bearing
Center bracket
(3) 3/8"
Washers
Set screws
(3) 3/8" - 16
Hex nuts
(3) 3/8" Lock
washers
Coupler halves
(3) 3/8"
Washers
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 (Once set screws contact the shaft, tighten
screws an additional 1/2 turn).
Repeat the same process for the other coupler half.
NOTE: Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
bracket
bearing
Left hand cable
drum, red
black
Torsion keyed shaft
NOTE: Layout
counterbalance parts in
proper orientation, then
install onto torsion
shaft, as shown.
Center bracket
Red cable drum
(left hand side)
Center bracket
bearing
Torsion keyed shaft
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.
15
Right hand cable
drum, black
Torsion
keyed
shaft
Coupler
halves
Center
bracket
bearing
Set screws
and Lock nut
Key
Right wound, red
winding cone
(left hand side)
Black cable drum
(right hand side)
Torsion keyed shaft
Center bracket
bearings
Coupler
halves
bearing
Set screws
and Lock nut
Key
Right wound, red
winding cone
(left hand side)
Center bearing
brackets
Center bracket
bearing
Right wound, red
winding cone (left
hand side)
Left hand end
bearing bracket
Left wound, black
winding cone
Center
(right hand side)
Key
Coupler halves
assembled
Left wound, black
winding cone
(right hand side)
Key
Coupler halves
assembled
Coupler
half
Torsion
keyed
shaft
Torsion
keyed
shaft
Right
hand end
bearing
bracket