Removing The Rear Upper Impeller Assembly; Figure 77: Removing The Rear Upper Impeller Assembly - Juniper Internet Router M160 Hardware Manual

Removing the Rear Upper Impeller Assembly

To remove the rear upper impeller assembly, follow this procedure (see Figure 77
and Figure 78, which show the two types of impeller that can be installed):
1.
2.
3.
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.

Figure 77: Removing the Rear Upper Impeller Assembly

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.
Loosen the thumbscrew at each corner of the impeller cover, using a Phillips
screwdriver if necessary.
Grasp the thumbscrews at opposite corners of the impeller cover and slide the
assembly halfway out of the chassis.
When the impeller is no longer spinning, slide the assembly completely
out of the chassis.
Replacing Hardware Components
Replacing Cooling System Components
157