b. Locate the most forward (closest to the front of the rail) screw and nut which hold the
length adjustment bracket in place.
c. Using a screwdriver and a nut driver (pliers or vise-grips will work as well), remove the
forward-most screw and nut.
d. Slide the length adjustment bracket to the rear of the rail until it stops.
Figure 46 26"-30" Marking
e. Slide the inner rail mechanism to the rear of the rail until the 26"-30" mark is visible. If the
inner mechanism is locked, depress the leaf spring to free it.
f. Adjust the hardware to make sure the mounting holes are aligned with the mounting slots.
g. Secure the length adjustment bracket in place using the screw and nut that were removed
earlier.
h. Repeat for the other rail.
l
To change the length of the rail to 30-34"" (longest setting) do the following:
a. Orient one of the rails to identify the front of the rail so that the inside of the rail is visible
with the spacing markings visible.
b. Locate the two screws and nuts which hold the length adjustment bracket in place.
c. Using a screwdriver and a nut driver (pliers or vise-grips will work as well), remove both
screws and nuts. The length adjustment bracket will be free of the rail.
d. Move the length adjustment bracket to the rear of the rail and align the mounting slots with
the mounting holes near the rear of the rail.
Figure 47
30"-34" Marking
e. Slide the inner rail mechanism to the rear of the rail until the 30-34" mark is visible. If the
inner mechanism is locked, depress the leaf spring to free it.
f. Adjust the hardware to make sure the mounting holes are aligned with the mounting slots.
Install the Disk Shelves in the Rack
52 Dell EMC PowerProtect DD9900 System Installation Guide
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