M160 Internet Router Hardware Guide
Figure 37: Removing the Rear Upper Impeller Assembly
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Figure 38: Removing the Rear Upper Impeller Assembly
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Removing the Rear Lower Impeller Assembly
The rear lower impeller assemblyis located to the left of the circuit
breaker box on the rear ofthe chassis, as shown in Figure 2. The
assembly weighs approximately 5 lb(2.3 kg).
Toremove the rear lower impeller assembly,follow this procedure (see Figure 39):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wris t and
connect the strap toone of the ESD points on the chassis. Make sure the router
is attached to a proper earth ground. For more information about ESD, see
“Preventing ElectrostaticDischarge Damage” on page 226.
2. Loosen the thumbscrew at each corner of the impeller cover, using a Phillips
screwdriver if necessary.
92 Removing Components from the Chassis