IBM 0551, Manual

Page: 168 / 182

4. Read the following note, and then slowly pull the system or expansion unit out from the rack until
the rails are fully extended and locked.
Remember:
v
If the procedure you are performing requires you to unplug cables from the back of the system or
expansion unit, do so before you pull the unit out from the rack.
v Ensure that the cables at the rear of the system or expansion unit do not catch or bind as you pull
the unit out from the rack.
v
Ensure the rails are fully extended. When the rails are fully extended, the rail safety latches lock
into place. This action prevents the system or expansion unit from being pulled out too far.
Placing the rack-mounted system or expansion unit in the operating
position
Use this procedure to place the rack-mounted system or expansion unit in the operating position to make
the unit available for use.
Tip: Some of the figures in these procedures might not look exactly like the system or expansion unit
that you have. However, the steps to perform the task are the same.
To place the rack-mounted system or expansion unit into the operating position, follow these steps:
1. Simultaneously release the blue rail safety latches (A) , located near the front of each rail, and push the
system or expansion unit into the rack as shown in the following figure.
Note: Ensure that the cables at the rear of the system or expansion unit do not catch or bind as you
push the unit back into the rack.
Figure 147. Releasing the rail safety latches
158
Installing into a rack