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Installing and Upgrading Fans in Cisco 2811
Series Routers
This document describes how to install or upgrade fans that are located internally within a Cisco 2811
series integrated services router. You need to remove the cover from the router to install or remove any
of these items. The document contains the following sections:
• Safety Warnings, page 1
• Removing the Chassis Cover, page 2
• Locating the Fan, page 5
• Installing and Removing the Fans, page 5
• Installing the Chassis Cover, page 13
Before you begin the fan replacement procedure, disconnect the power and remove the cover, as
described in the “Removing the Chassis Cover” section on page 2. After you complete the fan
replacement procedure, install the chassis cover as described in the “Installing the Chassis Cover”
section on page 13.
Safety Warnings
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Statement 1024
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Statement 1
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