Cisco Systems 2821 Series, 2851 Series

Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers

78-18643-02

Upgrading the Cisco 2821 and Cisco 2851 Fan Unit

Step5 Remove the router cover. Follow these steps:

a. Use a number 2 Phillips screwdriver to remove the three screws at the back of the top cover. Set the

screws aside in a safe place.

b. Lift the cover up at a 45-degree angle, as shown in Figure4.

Figure4 Removing the Cover from a Cisco 2821 or Cisco 2851 Router

c. Slide the cover to the side (toward the side with the fans) until the tabs are free from the slots, as

shown in Figure 4.

d. Lift the cover away from the router chassis, and set the cover aside.

1Lift cover 2Slide cover to free the tabs

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Contents

Main Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers Safety Warnings and Guidelines Safety Warnings Statement 1071Warning Definition Page Page Page Page Page Safety Guidelines Safety with Electricity Preventing Electrostatic Discharge Damage Items in the Fan Replacement Kit Required Tools and Equipment Location of the Cisco 2821 and Cisco 2851 Router Fans Upgrading the Cisco 2821 and Cisco 2851 Fan Unit Removing the Router Cover Installing and Upgrading Fans in the Cisco 2821 and Cisco 2851 Series Routers 78-18643-02 Upgrading the Cisco 2821 and Cisco 2851 Fan Unit Figure 2.) Figure2 Location of the Arrow on the Bezel 1Location of the arrow . Page Page Removing the Fan Unit Page Installing the Fan Unit 1 2 4 63 5 Replacing the Router Cover Obtaining Documentation, Obtaining Support, and Security Guidelines