Craftsman 139.53993DM Owner's Manual page 9

1/2 hp 315mhz garage door opener for residential use only
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Assemble the Rail (continued)
3. Attach rail support braces to the back rail. Loosely insert
1/4"-20x7/16" hex bolts into the aligned holes of the end rail and
rail support brace (Figure 1). Do not fi nger tighten.
4. Extend the drive screw a few inches from the center rail, and
slide the sleeve onto the long journal (Figure 2).
5. Interlock the long and short journal of the center and back rails.
Slide the sleeve over the journal connection (Figure 3).
6. Place the c-clip onto the long journal shaft (center rail) to
ensure that the sleeve does not slide (Figure 4).
7. Slide the center rail so that the center rail and rail brace holes
are aligned (Figure 5). Secure with bolts.
8. Tighten all hex bolts.
9. Repeat steps 3-8 for header section.
Figure 1
Rail Support Brace
Rail Support Brace
Figure 2
Drive Screw
Center Rail
Figure 3
Metal Sleeve
Rail Support Brace
Rail
Metal Sleeve
Long Journal
Short Journal
Long Journal
HARDWARE SHOWN ACTUAL SIZE
Metal Sleeve
Figure 4
Center Rail
Figure 5
Center Rail
9
C-Clip
Hex Bolt 1/4"-20x7/16"
Metal Sleeve
C-Clip
Rail Support Brace

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