Dell 6350 Rack Installation page 19

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2. Remove the front door from the rack as shown in Figure 1-3.
a. One person should grasp the top of the door to stabilize it. The other person
should grasp the bottom of the door.
b. The person holding the bottom of the door should press the hinge release
lever on the bottom hinge and then pull the door away from the rack.
c. The person holding the top of the door should press the hinge release lever
on the top hinge and then pull the door away from the rack.

      
3. Repeat steps 1 and 2 to remove the back door from the rack, but turn the door
handle counter-clockwise.
hinge
release
lever
Rack Installation Guide 1-5