Replacing The T640 Standard Lower Front Fan Tray; Removing The T640 Standard Lower Front Fan Tray - Juniper T640 Hardware Manual
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Replacing the T640 Standard Lower Front Fan Tray
Copyright © 2013, Juniper Networks, Inc.
Upgrading to the T640 Quiet Fan Trays on page 236
Replacing the T640 Quiet Upper Front Fan Tray on page 243
Replacing the T640 Quiet Lower Front Fan Tray on page 245
Replacing the T640 Quiet Rear Fan Tray on page 247
Replacing a T640 Air Filter on page 249
The lower front fan tray is located below the front air filter. Each standard front fan tray
weighs about 18.6 lb (8.4 kg). The fan trays are hot-insertable and hot-removable. The
standard upper and lower fan trays are interchangeable with each other.
Removing the T640 Standard Lower Front Fan Tray on page 231
1.
Installing the T640 Standard Lower Front Fan Tray on page 232
2.
Removing the T640 Standard Lower Front Fan Tray
The upper front fan tray is located above the FPC card cage, and the lower front fan tray
is located below the front air filter. Each fan tray weighs about 18.6 lb (8.4 kg).
To remove a standard lower front fan tray:
Attach an electrostatic discharge (ESD) grounding strap to your wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Unwrap any PIC cables from the spools on the cable management system and remove
2.
the cables from the tray. Arrange the cables so that they do not block 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.
CAUTION:
Do not let fiber-optic cable hang free from the connector. Do
not allow fastened loops of cable to dangle, which stresses the cable at
the fastening point.
Simultaneously pull the two releases on the cable management system. Lift it up and
3.
outward to lock it in place to access the lower fan tray.
Rearrange the PIC cables in the cable management system. For more information
4.
about proper cable arrangement, see
page
191.
Loosen the captive screws on the corners of the fan tray faceplate.
5.
Grasp the handles and pull the fan tray halfway out of the chassis.
6.
Chapter 17: Replacing T640 Router Hardware Components
"Maintaining T640 PICs and PIC Cables" on
231
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