Removing the T640 Quiet Lower Front Fan Tray
To remove the quiet lower front fan tray:
1. Attach an electrostatic discharge (ESD) grounding strap to your 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 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.
3. Simultaneously pull the two releases on the cable management system. Lift it up and
outward to lock it in place to access the lower fan tray.
4. Rearrange the PIC cables in the cable management system. For more information
about proper cable arrangement, see “Maintaining T640 PICs and PIC Cables” on
page 454.
5. Loosen the captive screws on the corners of the fan tray faceplate.
6. Grasp both sides of the fan tray, and pull the fan tray out of the chassis approximately
1 to 3 inches.
WARNING: To avoid injury, keep tools and your fingers away from the fans
asyou slide the fan tray out of the chassis. The fansmight still be spinning.
7. Press the two latches located on each side of the fan tray up to release the fan tray
from the chassis.
8. When the fans stop spinning, place one hand under the fan tray to support it and pull
the fan tray completely out of the chassis.
Copyright © 2017, Juniper Networks, Inc.300
T640 Core Router Hardware Guide
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