Reinstalling 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. To reinstall it, follow this procedure (see Figure 48):

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.
2. Orient the impeller so that the label is on the top. Align the rails on the upper edges of the impeller assembly with the guides inside the chassis.
3. Push the impeller assembly up and to the right to start it into the chassis, then slide it all the way in.
4. Tighten the thumbscrew at each corner of the impeller cover.