Craftsman 139.53910 - Manual (Page 16)

Hang the Opener
Three representative instailations are shown. Yours
may be different. Hanging brackets shouid be angled
(Figure 1) to provide rigid support. On finished
ceiiings (Figure 2 and Figure 3), attach a sturdy
metai bracket to structural supports before instaiiing
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"-18x1-7/8" iag 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.
NO TE: DO NOT connect power to opener at
this time.
INSTALLATION STEP 5
A WARNING
To avoid possible SERIOUS INJURY from 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
Boff 5/16“-18x7/8"
Look Washer 5/16"
Nut5/16"~18
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