Chamberlain 1345M Owner's Manual page 9

ASSEMBLY STEP 3
Fasten the Rail to the Motor Unit
MODELS 1356M AND 1346M ONLY
• Remove the two washered bolts mounted in top of
motor unit.
• Align rail and styrofoam over sprocket.
• Cut tape from rail, chain and styrofoam. Remove
styrofoam and pull the chain back (away from the
mounting plate).
• Fasten the rail with the two washered bolts previously
removed. Tighten securely.
Use only these bolts! Use of any other bolts will
cause serious damage to door opener.
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of the
opener.
Styrofoam
Packaging
Chain
Rail
USE ONLY THIS
TYPE AND SIZE
BOLT
9
USE ONLY THIS
Washered
TYPE AND SIZE
Bolts
BOLT
5/16"-18x1/2"
Motor
Unit
Sprocket
Washered Bolts
5/16"-18x1/2"
Mounting
Plate
Styrofoam
Packaging