Replacing The T640 Quiet Rear Fan Tray; Removing The T640 Quiet Rear Fan Tray; Figure 132: Installing The Quiet Lower Front Fan Tray - Juniper T640 Hardware Manual

Figure 132: Installing the Quiet Lower Front Fan Tray

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Replacing the T640 Quiet Rear Fan Tray

Copyright © 2013, Juniper Networks, Inc.
Unlock the cable management system and lower it to the fully lowered position.
6.
Rearrange the PIC cables in the cable management system. For more information
7.
about proper cable arrangement, see
page 191.
T640 Cooling System Description on page 75
Maintaining the T640 Fan Trays on page 181
Troubleshooting the T640 Cooling System on page 203
T640 Preventing Electrostatic Discharge Damage on page 386
The rear fan tray is mounted vertically on the right side of the rear of the chassis. The
quiet rear fan tray contains eight fans, and is not interchangeable with the front fan trays.
The quiet rear fan tray must be used in conjunction with the quiet front fan trays. The
quiet rear fan tray weighs about 10 lb (4.5 kg).
Removing the T640 Quiet Rear Fan Tray on page 247
1.
2. Installing the T640 Quiet Rear Fan Tray on page 248

Removing the T640 Quiet Rear Fan Tray

To remove the quiet rear fan tray (see
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to an approved site ESD grounding point.
Loosen the captive screws on the top and bottom of the fan tray faceplate.
2.
Grasp the handles, and pull the fan tray halfway out of the chassis.
3.
WARNING: To avoid injury, keep tools and your fingers away from the fans
as you slide the fan tray out of the chassis. The fans might still be spinning.
Chapter 17: Replacing T640 Router Hardware Components
"Maintaining T640 PICs and PIC Cables" on
Figure 133 on page 248):
247