Assembly Instructions; Attach Cable Pulley Bracket - Sears 39.18205SR - 1/2 HP Owner's Manual

ASSEMBLY STEP 1
Assemble Tee Rail &

Attach Cable Pulley Bracket

TO AVOID INSTALLATION DIFFICULTIES, DO
NOT RUN THE GARAGE DOOR OPENER UNTIL
INSTRUCTED TO DO SO.
PROCEDURE: Place the 3 Tee rail sections on a flat
surface for assembly. THIS IS IMPORTANT. The end
sections are identical. THE CENTER SECTION
BRACES MUST BE POSITIONED AGAINST THE
END SECTIONS AS SHOWN. Make sure that the
"directional arrow" is pointing toward the front (to
door). Study the illustration CAREFULLY.
(When assembled, Tee rail has a front-to-back
position as shown)
Bolt rail sections together with the hardware
illustrated and from the direction indicated.
SQUARE NECKS ON CARRIAGE BOLTS MUST
BE SEATED IN SQUARE HOLES IN RAIL
SECTIONS.
The end sections of the rail
MUST be connected to the center
section from the direction shown
in the illustration. Otherwise, the
trolley will hit against the nut
when installed (Pg. 8)
(End Section)
Chain pulley bracket
attaches to FRONT
END of t-rail
Step 1- Assemble T-Rail & Attach Chain Pulley Bracket
Liftmaster 3750E (European/English)
(Center Section)
Brace
T-Rail
Square Carriage
Bolt Holes
T-RAIL FRONT
(TO DOOR)
CAUTION: Do not tighten the lock nuts until bolt
necks are seated in square holes and rail sections
are positioned correctly (see right and wrong
views below).
Disk #1 (Yellow) - 8/27/90
RIGHT
1/4'' Lock Nut
Brace
T-Rail
5/16"-18x7/8"
Chain
Pulley
Bracket
Position the cable pulley bracket on the front end of
Tee rail as shown. Fasten securely with the hardware
provided.
IMPORTANT : When tightening screws, be sure to
keep bracket parallel to rail. Otherwise, rail may
bow when opener is operated.
7
WRONG
T-RAIL BACK
(TO CHASSIS)
T-Rail
(End Section)
Carriage Bolt
Screws
Screws
5/16"-18x7/8"
Nut
Lock Washer
5/16"
5/16"
Chain
Pulley
Bracket
Lock Washer
5/16"
1/4"-20x1/2"
Nut
5/16"