Replacing A T4000 Lower Front Fan Tray; Removing The T4000 Lower Front Fan Tray; Figure 103: Installing A Replacement Craft Interface - Juniper T4000 Hardware Manual

T4000 Router Hardware Guide
Related
Documentation

Replacing a T4000 Lower Front Fan Tray

Removing the T4000 Lower Front Fan Tray

236
After you install the replacement craft interface, immediately reinstall the upper front
fan tray. See "Replacing a T4000 Upper Front Fan Tray" on page

Figure 103: Installing a Replacement Craft Interface

FANTR AY-T40 00
T4000 Craft Interface Description on page 23
Troubleshooting the T4000 Craft Interface on page 196
The lower front fan tray is located below the front air filter. Each front fan tray weighs
about 20.4 lb (9.3 kg). The fan trays are hot-insertable and hot-removable. The upper
and lower fan trays are interchangeable with each other.
NOTE: Ensure that at any given time only one front fan tray is replaced. Do
NOT replace both the front lower and upper fans simultaneously.
Removing the T4000 Lower Front Fan Tray on page 236
1.
2. Installing the T4000 Lower Front Fan Tray on page 237
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 front cable management system and
2.
remove the cables from the tray. Arrange the cables so that they do not block the
front 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.
238.
Copyright © 2013, Juniper Networks, Inc.