Dell PowerEdge 4220 - Manual (Page 11)

Installation Guide
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3 While holding the hinge pin out of the door’s hinge-pin housing, pull
the door slightly away from the rack so that the door clears the hinge body.
4 Release the hinge pin.
5 Lift the door upward so that the door clears the bottom hinge post.
WARNING:
Due to the size and weight of the door, it is recommended that you lay
the removed door flat with its outer surface facing upward.
6 Lay the door in a safe location with the door’s outer surface facing upward
to help prevent damage to the door’s badge and cosmetic coating.
Replacing the Front Door
To replace the front door, perform the steps for removal in reverse.
Opening and Removing the Back Doors
WARNING:
Because of the size and weight of the rack cabinet doors, never
attempt to remove or install them by yourself.
1 Turn the door handle and open the back doors (see Figure 1-2).