Cisco ASR 903 Installation Manual page 86

Installing Plenum A903-F2B-AIR-U Assembly and Chassis in the Rack
Figure 56: Securing the Air Baffle Tray
1 Air baffle 3
2 Side plate 4
Step 2
Secure the air baffle using a maximum torque of 11.5 in.-lb (1.3 N-m). See figure below.
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
76
Plenum base
Secure screw to Plenum base
Installing the Cisco ASR 903 Router