Installing the Router without a Mechanical Lift
If a second Routing Engineis installed, repeat the procedure to removeit.
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 top of the chas sis rear,as
shown in Figure 2. The assembly weighs approximately 4 lb (1.8 kg).
Toremove the rear upper impeller assembly,follow this procedure (see Figure 37
and Figure 38, which show the two types of impel ler that can be installed):
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.
3. Grasp the screwsat opposite corners of the impeller cover and slide the
assembly out of the chassis.
Removing Components from the Chassis 91