CHAPTER 26
Replacing Cooling System Components
•
Replacing a T640 Air Filter on page 281
•
Replacing the T640 Standard Lower Front Fan Tray on page 286
•
Replacing the T640 Standard Upper Front Fan Tray on page 288
•
Replacing the T640 Standard Rear Fan Tray on page 290
•
Upgrading to the T640 Quiet Fan Trays on page 292
•
Replacing the T640 Quiet Lower Front Fan Tray on page 299
•
Replacing the T640 Quiet Upper Front Fan Tray on page 302
•
Replacing the T640 Quiet Rear Fan Tray on page 304
Replacing a T640 Air Filter
1.
Removing a Front T640 Air Filter on page 281
2.
Installing a Front T640 Air Filter on page 283
3.
Removing a Rear T640 Air Filter on page 283
4.
Installing a Rear T640 Air Filter on page 285
Removing a Front T640 Air Filter
The front air filter, located below the FPC card cage in the front of the chassis, and installs
horizontally. The front air filter weighs approximately 1 lb (0.5 kg).The air filters are
hot-insertable and hot-removable.
To remove the front air filter (see Figure 124 on page 282):
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.
2. Unwrap any PIC cables from the spools on the cable management system, and remove
the cables from the tray. Arrange the cables so that they do not block the front of the
cable management system and tray, and secure them with temporary fasteners so
that they are not supporting their own weight as they hang from the connector.
281Copyright © 2017, Juniper Networks, Inc.
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