Juniper Networks M160 manual Removing the Rear Lower Impeller Assembly

Replacing Hardware Components

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 Lower Impeller Assembly on page 155

Installing the Rear Lower Impeller Assembly on page 155

Removing the Rear Lower Impeller Assembly

To remove the rear lower impeller assembly, follow this procedure (see Figure 75):

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.Loosen the thumbscrew at each corner of the impeller cover, using a Phillips screwdriver if necessary.

3.Grasp the thumbscrews at opposite corners of the impeller cover and slide the assembly halfway out of the chassis.

CAUTION: To avoid injury, as you slide the assembly out of the chassis do not touch any part of the impeller behind the front panel—the impeller might still be spinning.

4.When the impeller is no longer spinning, slide the assembly completely out of the chassis.

Figure 75: Removing the Rear Lower Impeller Assembly

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Installing the Rear Lower Impeller Assembly

To install the rear lower impeller assembly, follow this procedure (see Figure 76:

Replacing Cooling System Components 155