Dell FPM185 User Manual page 30

To remove tooled rails:
1 Unscrew the two pairs of screws to detach the left and right brackets from
the front vertical rack flanges.
2 Unscrew the two pairs of screws to detach the left and right mounting rails
from the rear vertical rack flanges.
Figure 4.3. Removing Tooled Rails
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26 Removal from the Rack
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