Craftsman 139.18451D Manuel Du Propriétaire page 16

INSTALLATION STEP 5
Hang the Opener
Three representative installations are shown. Yours may
be different. Hanging brackets should be angled (Figure
1) to provide rigid support. On finished ceilings (Figure 2
and Figure 3), attach a sturdy metal bracket to structural
supports before installing the opener. This bracket and
fastening hardware are not provided.
1. Measure the distance from each side of the motor unit
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"-18xl -7/8" lag screws.
5. Fasten the opener to the hanging brackets with 5/16"-
18x7/8" hex bolts, 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.
NOTE: DO NOT connect power to opener at
this time.
HARDWARE SHOWN ACTUAL SIZE
Hex Bolt
5/16"- 18x7/8" Nut 5/16"-18
Lock Washer 5/16"
To avoid possible SERIOUSINJURYfrom a falling garage
door opener, fasten it SECURELY to structural supports of
the garage. Concrete anchors MUST be used if installing any
brackets into masonry.
Figure 1
Structural
Supports
Lag Screws
5/16"-18xl -7/8"
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Measure
/
Distance
Figure 2
Hidden
Support Lag Screws
......... I_ ~ 5/16"- 18x 1-7/8"
Bracket FINISHED CEILING
(Not Provided)
\
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Figure 3
Lag Screws
5/16"- 18xl-7/8" FINISHED CEILING
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Bolt 5/16"- 18x7/8"
Lock Washer 5/16"
16