Internet Router Hardware Guide

Installing the Router without a Mechanical Lift
If a second Routing Engine is installed, repeat the procedure to remove it.
Figure 36: Removing a Routing Engine
PCG 0
SFM 0
SFM 1
MCS 0
RE 0
RE 1
PCG 1
1950
Extractor
clip
Removing the Rear Upper Impeller Assembly
The rear upper impeller assembly is located at the t op of the chassis rear, as
shown in Figure 2. The assembly weighs approximately 4 lb (1.8 kg).
To remove the rear upper impeller assembly, follow this procedure (see Figure 37
and Figure 38, which show the two types of impeller that can be installed):
1. A tt ach 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 t he 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.
3. Grasp the screws at opposite corners of the impeller cover and slide the
assembly out of the chassis.
Removing Com ponents from the Chassis 91