Cisco 10720 Configuration Guide - Page 144
Installing the Fan Guard Required on Fan Number 4, Step 2
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Removing and Installing the Router Fan Assembly Chapter 5 Maintaining the Cisco 10720 Internet Router Step 2 Attach an ESD-preventive strap to your wrist, and to the router or to a bare metal surface. (See the "Preventing Electrostatic Discharge" section on page 2-3.) Note Step 3 is only required when installing Fan Number 4. To install Fan Numbers 1, 2, and 3, proceed to Step 4. Figure 5-24 Installing the Fan Guard (Required on Fan Number 4) 57857 Step 3 Install the fan guard on Fan Number 4 before securing the fan to the router chassis or operating the router. To install the fan guard, perform the following: 1. Place the fan guard onto the back of the fan. (See Figure 5-24.) 2. Using four washers, place one on each corner of the fan guard. (See Figure 5-24.) 3. Using a Number 1 Phillips screwdriver, secure the fan guard and washers to the fan with four screws. (See Figure 5-24.) 5-22 Cisco 10720 Internet Router Installation and Configuration Guide 78-13062-10