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 assembly is located to the left of the circuit breaker box on the rear of the chassis, as shown in Figure 2. The assembly weighs approximately 5 lb (2.3 kg).

To remove the rear lower impeller assembly, follow this procedure (see Figure 39):

1.Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one 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 Electrostatic Discharge 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

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Juniper Networks M160 manual Removing the Rear Lower Impeller Assembly, Removing the Rear Upper Impeller Assembly