Cisco ASR 9901 Hardware Installation Manual page 62

Installing the Chassis in a Four-Post Rack
Step 3
Use two persons to lift the chassis into the rack holding the top and bottom of the chassis (see the figure
below).
Figure 64: Correct Lifting Positions
Step 4 Position the chassis so that the mounting brackets on the sides of the chassis align with the slide rail assemblies.
Step 5
Slide the chassis into the rack until the rack-mounting flanges are flush against the mounting rails on the rack.
Step 6 Hold the chassis in position against the mounting rails while the second person finger-tightens four screws to
the rack rails on each side of the chassis (see the figure below).
Cisco ASR 9901, ASR 9001, and ASR 9001-S Routers Hardware Installation Guide
54
Unpacking and Installing the Chassis