Chapter 10

Maintaining Hardware Components
This chapter describes how to maintain hardware components ins talled in the
router. Some components,such as the Connector Interface Panel (CIP), require
no maintenance.
For information about returninga part to Juniper Networks for repairor
replacement, see “ContactingCustomer Support and Returning Hardware” on
page 255.
Routine Maintenance Procedureson page 127
Maintaining Cooling System Components on page 127
Maintaining Host Module Components on page 131
Maintaining PacketForwarding Engine Components on page 132
Maintaining Power Supplies on pa ge 137

Routine Maintenance Procedures

For optimum routerperformance, perform the following preventive
maintenance procedures regularly:
Inspect the installationsite for moisture, loose wires or cables, and excessive
dust. Make sure that airflow is unobstructed around the router and into
the air intake vents.
Check the status-reporting devices on the craft int erface: system alarms, LEDs,
and LCD. See Craft Interfaceon page 27.
Inspect the air filters at the bottomfront and left rear of the router, cleaning or
replacing it as needed foroptimum cooling system performance. Do not run
the router for more than a few minutes without the air filters in place. For
maintenance instructions, see “Maintaining the A ir Filter” on page 128.

Maintaining Cooling System Components

For instructions on maintainingcooling system components, see the following
sections:
Maintaining Cooling System Components 127