LiftMaster 1355 1355 Manual - Page 8

Caution - what size door

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ASSEMBLY STEP 1 Fasten the Rail to the Motor Unit MODELS 1355 AND 1345 ONLY (For Models 1356 and 1346 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. WARNING CAUTION 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 Washered Bolt 5/16"-18x1/2" Rail Hole Styrofoam ASSEMBLY STEP 2 Attach the Chain to the Sprocket and Install the Sprocket Cover MODELS 1355 AND 1345 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. USE ONLY THIS TYPE AND SIZE BOLT Washered Bolt 5/16"-18x1/2" Motor Unit Sprocket Sprocket Cover Back Tab Slot Front Tab Slot Mounting Plate 8

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8
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of
the opener.
CAUTION
ASSEMBLY STEP 1
Fasten the Rail to the Motor Unit
MODELS 1355 AND 1345 ONLY
(For Models 1356 and 1346 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.
• REMO
V
E STYROFOAM.
W
ashered Bolt
5/16"-1
8
x1/2"
Styrofoam
Rail
Hole
USE ONLY THIS
TYPE AND SIZE
BOLT
W
ashered Bolt
5/16"-1
8
x1/2"
Motor Unit
Sprocket
USE ONLY THIS
TYPE AND SIZE
BOLT
Sprocket Co
v
er
Mo
u
nting
Plate
Front Ta
b
Slot
Back Ta
b
Slot
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Sprocket Cover
MODELS 1355 AND 1345 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.