Dell PowerEdge 4220 Guide D'installation page 12

Figure 1-2. Opening the Back Doors
1 door handle
2 Remove the right back door.
a
b
c
10
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While supporting the door, pull the pin for the top hinge out of the
door's hinge-pin housing (see Figure 1-3).
You will hear a click as you pull the pin out of the door's hinge-pin
housing. The hinge pins are designed to prevent them from being
pulled out of the hinge body.
Repeat step a for the bottom hinge.
Pull the door away from the rack.
Installation Guide
2 back door (2)
1
2