9
To avoid SERIOUS damage to garage door opener, use
ONLY those bolts/fasteners mounted in the top of the
opener.
ASSEMBLY STEP 2
Fasten the Rail to the Motor Unit
• Insert a 1/4"-20x1-3/4" bolt into the cover
protection bolt hole on the back end of the rail as
shown. Tighten securely with a 1/4"-20 lock nut.
Do NOT overtighten.
• Remove the two bolts from the top of the motor
unit.
• Place the “U” bracket, flat side down, on the motor
unit and align the bracket holes with the bolt holes.
Fasten with the previously removed bolts.
• Align the rail assembly with the top of the motor
unit. Slide the rail end onto the “U” bracket,
all the
way to the stops that protrude on the top and sides
of the bracket.
ASSEMBLY STEP 3
Install the Idler Pulley
• Lay the belt beside the rail, as shown. Grasp the
end with the hooked trolley connector and pass
approximately 12" (30 cm) of belt through the
window. Keep the ribbed side toward the rail, and
allow it to hang until Assembly Step 5.
• Remove the tape from the idler pulley. The inside
center should be pre-greased. If dry, regrease to
ensure proper operation.
• Place the idler pulley into the window as shown.
• Insert the idler bolt from the top through the rail
and pulley. Tighten with a 3/8" lock washer and nut
underneath the rail until the lock washer is
compressed.
• Rotate the pulley to be sure it spins freely.
• Insert a 1/4"-20x1-3/4" bolt into the trolley stop
hole in the front of the rail as shown. Tighten
securely with a 1/4"-20 lock nut.
WARNING
CAUTION
WARNING
WARNING
Motor Unit
Sprocket
Foam Packaging
"U" Bracket
Lock
Nu
t
Bolts
SLIDE RAIL TO STOPS
O
N
TOP A
N
D SIDES
OF BRACKET
Co
v
er
Protection
Bolt Hole
Bolt
Idler
P
u
lley
Trolley
Connector
P
u
lley
Rail
Bolt
Nu
t
W
asher
Lock
W
asher
3/
8
"
Nu
t 3/
8
"
Idler
Bolt
Scre
w
dri
v
er
Idler P
u
lley
Grease
Inside P
u
lley
Trolley
Stop Hole
Bolt
Lock
Nu
t
Lock
Nu
t
1/4"-20
Bolt 1/4"-20x1-3/4"
HARDWARE SHOWN ACTUAL SIZE
Nu
t 3/
8
"
Lock
W
asher 3/
8
"
Idler Bolt
Lock
Nu
t 1/4"-20
Bolt 1/4"-20x1-3/4"
HARDWARE SHOWN ACTUAL SIZE
