Juniper Networks M160 manual Replacing the Front Impeller Assembly, Installing the Fan Tray

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.Grasp the sides of the fan tray and align the rear of the tray with the guides inside the chassis.

3.Slide the fan tray all the way into the chassis.

4.Tighten the thumbscrew at each end of the cable management system.

5.Rearrange the PIC cables in the cable management system. For more information about proper cable arrangement, see “Maintaining PICs and PIC Cables” on page 134.

Figure 70: Installing the Fan Tray

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Replacing the Front Impeller Assembly

The front impeller assembly, which includes the craft interface, is located at the front of the chassis above the FPC card cage, as shown in Figure 1. The assembly weighs approximately 14.5 lb (6.6 kg). The assembly is hot-removable and hot-insertable, as described in Field-Replaceable Units (FRUs) on page 4.

The craft interface is attached to the front of the front impeller assembly. If you are removing the front impeller assembly to replace it and the replacement assembly does not have a craft interface already installed on it, you must transfer the craft interface from the removed assembly to the replacement assembly. Perform the procedures described in the following sections:

Removing the Front Impeller Assembly on page 151

Removing the Craft Interface from the Front Impeller Assembly on page 152

150 Replacing Cooling System Components