Craftsman 139.53920D - Manual (Page 16)

INSTALLATiON STEP S
Hang the Opener
Three representasive inslallalions 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.
1Measure 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, Drlli 3/16" pilot holes in the structural supports,
4, Attach one end of each bracket to a support with
S/16“-18x1-7/8" 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 iine 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.-
Á WARNING
To avoid possible SERIOUS INJURY from a faKing
garage door opener, fasten it SECURELY to structural
supports of the garage. Concrete anchors MUST be used
if instaiiifig any brackets into masonry
Bo« s/íe"--fñx7/r
Lock Washer so 6*
Nu15/16'-ia
Figure 2
16