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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, fl at side down onto the motor
unit and align the bracket hole 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.
• Attach spreader to the motor unit with two screws.
ASSEMBLY STEP 3
Install the Idler Pulley
• Lay the chain/cable beside the rail, as shown. Grasp
the end of the cable and pass approximately 12"
(30 cm) of cable through the window. 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.
HARDWARE SHOWN ACTUAL SIZE
Lock Nut
1/4"-20
Bolt 1/4"-20x1-3/4"
Hex Screws
8-32x7/16"
Bolts
Bolt
Motor Unit
Sprocket
Lock Nut
Cover
Protection
Bolt Hole
Chain Spreader
“U” Bracket
SLIDE RAIL TO STOPS
ON TOP AND SIDES
OF BRACKET
Lock
Nut
Screwdriver
Chain and
Cable
Bolt
Idler
Bolt
Idler
Pulley
Idler
Pulley
Pulley
Lock
Washer
3/8"
Washer
Grease
Inside Pulley
Nut 3/8"
Nut
Trolley
Stop Hole
Cable Link
Rail
Bolt
HARDWARE SHOWN ACTUAL SIZE
Bolt 1/4"-20x1-3/4"
Lock Nut 1/4"-20
Lock Washer 3/8"
Nut 3/8"
Idler Bolt
Trolley