Juniper Networks M160 manual Replacing the Rear Upper Impeller Assembly

M160 Internet Router Hardware Guide

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.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.

Figure 76: Installing the Rear Lower Impeller Assembly

Label

Guides

Rails

1915

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-ReplaceableUnits (FRUs) on page 4. To replace it, perform the following procedures:

Removing the Rear Upper Impeller Assembly on page 157

Installing the Rear Upper Impeller Assembly on page 158

156 Replacing Cooling System Components