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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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Chapter 6 Maintaining the Router
Cleaning or Replacing the Air Filters
Step 6 Attach the front door to the chassis:
a. Remove the hinge pins from the hinges on the right side of the chassis.
b. Align the pivot blocks on the front door with the hinges on the right side of
the chassis and install the hinge pins to hold the door in place (see
Figure 6-2).
c. Close the front door by pressing the latch button allowing the door latch to
engage with the hinge pins on the chassis.
Cleaning or Replacing the Air Filters
The Cisco 12006 and Cisco 12406 routers are equipped with two user-serviceable
air filters that remove dust drawn into the router by the blower module. One time
per month (or more often in dusty environments), examine the air filters.