Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 320

Removing and Replacing the Fan Trays
Caution
hands when handling this assembly.
If you plan to return the removed fan tray to the factory for repair or replacement, repackage
the unit in the original shipping container, if available, and prepare the package for return
shipment.
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Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
The card cage fan tray weighs approximately 12 lb (5.45 kg). For safety, use both