Replacing The Rear Upper Impeller Assembly; Figure 76: Installing The Rear Lower Impeller Assembly - Juniper Internet Router M160 Hardware Manual

M160 Internet Router Hardware Guide
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Figure 76: Installing the Rear Lower Impeller Assembly

Replacing the Rear Upper Impeller Assembly

The rear upper impeller assembly is located at the upper left of the rear of the
chassis, as shown in Figure 2. It weighs about 4 lb (1.8 kg).
The assembly is hot-removable and hot-insertable, as described in Field-Replaceable
Units (FRUs) on page 4. To replace it, perform the following procedures:
156
Replacing Cooling System Components
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.
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.
Push the impeller assembly up and to the right to start it into the chassis,
then slide it all the way in.
Tighten the thumbscrew at each corner of the impeller cover.
Label
Guides
Rails
Removing the Rear Upper Impeller Assembly on page 157
Installing the Rear Upper Impeller Assembly on page 158