Chapter 5 Maintaining the Cisco 12404 Internet Router
Removing and Replacing the Fan Tray Assembly
5-28
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Installing the Air Filter
Instructions for installing the air filter in the air filter housing, at the left rear side
of the chassis, are presented in the following steps. Use
as a reference
for installing the air filter.
Step 1
Attach an ESD-preventive strap to your wrist or ankle; and attach the ESD clip to
the chassis or to a bare metal surface.
Timesaver
The arrows on the top edge of the air filter note the direction of air flow. Insert the
air filter into its housing with the arrows pointing toward the card cage.
Step 2
Slide the air filter completely into the air filter housing.
Caution
Do not damage the air filter. Damage to the air filter can restrict the airflow, cause
an overtemperature condition in the router and degrade EMI performance.
Removing and Replacing the Fan Tray Assembly
The fan tray assembly supports online insertion and removal (OIR), so you can
remove and install the fan tray assembly while the system remains powered on
without presenting an electrical hazard or damage to the system. This feature lets
you replace the fan tray assembly while the
system maintains all routing
information and ensures session preservation.
Caution
Although the fan tray assembly supports OIR and can be replaced without
interruption to system operation, do not operate the system without the fan tray
assembly for more than a few minutes to prevent overheating.
todd.book Page 28 Tuesday, November 27, 2007 6:02 PM