Removing and Replacing the Fan Trays
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
7-42
Installing a Fan Tray in the Lower Card Cage
For the following procedure, it is assumed that you have removed a defective fan tray from
the lower card cage and that you intend to replace it with a new one.
To install a new fan tray in the lower card cage, perform the following steps.
Caution For safety, use both hands when handling the card cage fan tray.
Step1 With one hand, grasp the ring-shaped insertion/extraction tab in the middle of
the new fan tray carrier and raise the front end of the assembly.
Step2 Place your free hand beneath the assembly to support its weight; position the
assembly in front of the guide rails in the lower card cage.
Step3 Carefully insert the assembly into the guiderails (see Figure 7-11).
Step4 Using gentle pressure on the insertion/extraction tab, fully insert the assembly
until the sheet metal carrier rests against the stops for the captive installation
screws.
If the router is operational, you should hear the fans come up to normal rotational
speed at this time.
Note All electrical connections are a made automatically when the fan tray and backplane
connectors mate. The fan tray then immediately powers up.
Step5 Tighten the two captive installation screws at the sides of the fan tray carrier.
Step6 Restore the air filter assembly so that it covers the lower card cage and fully
encloses the router. Secure the assembly in place by tightening its two panel
fastener screws.
To verify that the card cage fan tray is operating properly, go to the section entitled
“Checking the Installation of a Fan Tray.”