Chamberlain Power Drive PD505D Owner's Manual page 9

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 finger
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
Long Journal
Center Rail
Figure 3
Metal Sleeve
Rail Support Brace
Rail
Metal Sleeve
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