Table of Contents
Advertisement
Assembly
2 Attach the Chassis Support Bracket
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
ALWAYS keep hand clear of sprocket while operating opener.
l
Securely attach sprocket cover BEFORE operating.
l
1. Position the chassis support bracket on the unit.
2. Attach the bracket to the rail with 1/4"-20x5/8" hex bolts and lock washers. Do not overtighten.
3. Attach the bracket to the opener by inserting a 5/16"-18x1/2" washered screw through a hole
in each side flange and a matching hole in the bracket. Complete the connection by inserting
the #8-32x3/8" screw through the back flange and the hole in rail support.
Lock
Washer
Hex Bolt
1/4"-20x5/8"
Screw
#8-32x3/8"
Washerd Bolt
5/16"-18x1/2"
3 Tighten the Chain
1. Loosen the inner nut and lock washer on the trolley threaded shaft.
2. Tighten the outer nut until the chain is a 1/2 inch above the base of the rail at the midpoint of
the rail.
3. Re-tighten the inner nut.
Slack in the chain is normal when the door is closed. No readjustment is necessary.
NOTE: Sprocket noise can result if the chain is too loose. During future maintenance, ALWAYS pull the
emergency release handle to disconnect the trolley before adjusting the chain.
7
1/2"
Advertisement
Table of Contents
