Fujitsu PRIMERGY CX400 M4 Upgrade And Maintenance Manual page 62

Basic hardware procedures
Figure 20: Turning outer rail
Ê Turn the rails to the other side (see arrow).
Figure 21: Removing inner rail from outer rail
Ê Push the locking latch (1) and pull the outer rail as far as possible towards
the front side (2).
Now the inner rail is removed from the outer rail.
62 Upgrade and Maintenance Manual
CX400 M4