1-4 Dell PowerEdge 4x00 and 6300 Systems Tower Installation GuideRemoving the Doors From a 24-U or 42-U RackYou must remove the doors from the rack to provide access to the interior of therack and to prevent damage to the doors while installing the kit. To remove the doors,perform the following steps.CAUTION: To prevent personal injury due to the size and weight of thedoors, never attempt to remove the doors by yourself.1. Open the latch on the front door (see Figure 1-2).Slide the latch’s push-button cover up as far as it will go, press the push button,rotate the handle clockwise until the latch releases, and then pull the door open.Figure 1-2. Opening the Latch on the Door2. Remove the front door of the rack.If you have a 42-unit (U [1.75 inches]) rack, perform the following steps(see Figure 1-3):a. One person should grasp the top of the door to stabilize it. The other personshould grasp the bottom of the door.b. The person holding the bottom of the door should press the release lever onthe bottom hinge and then pull the bottom of the door away from the rack afew inches.c. The person holding the top of the door should press the release lever on thetop hinge and then pull the door away from the rack.push buttonpush-buttoncoverhandle