Hang The Opener - Craftsman 139.53663SRT Owner's Manual

Installation Step 6
The Chamberlain Group, Inc.

Hang the Opener

Screw Drive Liftmaster #114A1794
Hang Opener Chassis
6/18/94
Two representative installations are shown. Yours may
be different. Hanging brackets should be angled, Figure
1, to provide rigid support. On finished ceilings, Figure 2,
attach a sturdy metal bracket to structural supports before
installing the opener. The bracket and fastening hardware
are not supplied.
1. Measure the distance from each side of the opener to
the structural support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16" - 18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16" - 18x7/8" screws, lock washers and nuts.
6. Check to make sure the rail is centered over the door
(or in line with the header bracket if the bracket is not
centered above the door).
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
Hardware Shown Actual Size
5/16"-18x1-7/8"
Hex Screw
5/16"- 18x7/8"
Lag Screw
Lock Washer 5/16"
Nut 5/16"-18
The opener could fall and injure someone if it is not
properl y secured. Fasten the opener securel y to
structural supports of the garage.
Figure 1
[
5/16"-18x7/8"
Hex Screws
5/16" Lock Washers
5/16"-18 Nuts
Figure 2
Bracket
(Not Supplied)
5/16"-18x7/8" Screw
5/16" Lock Washer
5/16"-18 Nut
20
WARNING
CAUTION
Measure
Distance
Preferred Range of
Bracket Placement
— FINISHED CEILING —
Lag Screws
5/16"-18x1-7/8"
Lag Screw
5/16"-9x1-5/8"
Preferred Range of
Bracket Placement
Structural
Supports
Lag Screws
5/16"-18x1-7/8"
Hidden
Support
(Not Supplied)
5/16"-18x7/8" Screw
5/16" Lock Washer
5/16"-18 Nut