Maintaining T4000 Cooling System Components; Maintaining The T4000 Air Filters; Figure 88: Airflow Through The Chassis - Juniper T4000 Hardware Manual

T4000 Router Hardware Guide
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Maintaining T4000 Cooling System Components

Maintaining the T4000 Air Filters

Purpose
Action
180
Check the status-reporting devices on the craft interface: system alarms, LEDs, and
LCD.
Inspect the air filters at the bottom front and left rear of the router. Do not run the
router for more than a few minutes without the air filters in place.
Check the air filters regularly for dust and debris. As a general guideline, we
recommended that you replace the filter elements every 6 months for routers operating
in a typical environment. The filter elements degrade over time, and replacement
intervals will vary by operating environment.
T4000 Cooling System Description on page 21
T4000 Craft Interface Description on page 23
Maintaining the T4000 Air Filters on page 180
Maintaining the T4000 Air Filters on page 180
Maintaining the T4000 Fan Trays on page 181
For optimum cooling, verify the condition of the air filters.
Air filters for both the front and rear fan trays help keep dust and other particles from
entering the cooling system. To function properly, the entire cooling system requires an
unobstructed airflow and proper clearance around the site, as described in
Clearance Requirements for Airflow and Hardware Maintenance" on page
Figure 88 on page 180.

Figure 88: Airflow Through the Chassis

Check the air filters regularly for dust and debris. As a general guideline, we recommended
that you replace the filter elements every 6 months for routers operating in a typical
"T4000
59. See
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