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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, 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.
To avoid SERIOUS damage to garage door opener, use
ONLY those bolts/fasteners mounted in the top of the
opener.
HARDWARE SHOWN ACTUAL SIZE
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.
HARDWARE SHOWN ACTUAL SIZE
Bolt 1/4"-20x1-3/4"
Lock Nut
1/4"-20
“U” Bracket
SLIDE RAIL TO
STOPS ON TOP
AND SIDES
OF BRACKET
Cover
Protection
Bolt Hole
Lock Nut
Lock
Nut
Screwdriver
Motor Unit
Belt Pulley
Bolt
Bolt
Bolt
Bolts
Idler
Bolt
Idler
Pulley
Idler
Pulley
Pulley
Lock
Washer
3/8"
Washer
Grease
Inside Pulley
Nut 3/8"
Nut
Trolley
Stop Hole
Trolley
Connector
Rail
Bolt 1/4"-20x1-3/4"
Lock Nut 1/4"-20
Lock Washer 3/8"
Nut 3/8"
Idler Bolt