Assembly; Fasten The Rail To The Motor Unit; Install The Chain And The Sprocket Cover - Chamberlain 1345M Owner's Manual

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

MODELS 1355M AND 1345M ONLY
(For Models 1356M and 1346M see page 9)
• Remove the two washered bolts mounted in top of
motor unit.
• Position rail at an angle to opener so one hole in rail
and motor unit line up.
• Thread one of the washered bolts part way in.
Use only these bolts! Use of any other bolts will
cause serious damage to door opener.
• Align rail and styrofoam over sprocket. Cut tape from
rail, chain and styrofoam.
• REMOVE STYROFOAM.
ASSEMBLY STEP 2
Attach the Chain to the Sprocket and
Install the Sprocket Cover
MODELS 1355M AND 1345M ONLY
• Position chain over the sprocket. If necessary, loosen
the outer nut on the trolley to obtain more chain slack.
• Insert the second washered bolt. CAUTION: Use only
the bolt previously removed from motor unit!
• Tighten both screws securely through the rail into the
motor unit as shown.
• Install the sprocket cover: Insert the back tab in the slot.
Squeeze the cover slightly and insert the front tab in the
slot on the mounting plate.
Proceed to Assembly Step 5.
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of the
opener.
USE ONLY THIS
TYPE AND SIZE
BOLT
USE ONLY THIS
TYPE AND SIZE
BOLT
Front Tab Slot
8
Washered Bolt
5/16"-18x1/2"
Styrofoam
Rail
Hole
Washered Bolt
Motor Unit
5/16"-18x1/2"
Sprocket
Sprocket Cover
Back Tab Slot
Mounting
Plate