Installing The T640 Router Using A Mechanical Lift; Removing The T640 Power Supplies; Removing The T640 Router Installation Handle And Reinstalling The Power - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

Installing the T640 Router Using a Mechanical Lift

Removing the T640 Power Supplies

102
Removing the T640 Power Supplies on page 102
1.
Attaching the T640 Router Installation Handle on page 103
2.
3. Mounting the T640 Chassis Using a Mechanical Lift on page 104

Removing the T640 Router Installation Handle and Reinstalling the Power

4.
Supplies on page 107
The power supplies are located at the rear of the chassis below the SIBs. Each two-input
160-A DC power supply weighs approximately 23 lb (10.5 kg). Each three-input 240-A
DC power supply weighs approximately 25 lb (11.3 kg). Each four-input 240-A DC power
supply weighs approximately 26.6 lb (12.0 kg). Each six-input DC power supply weighs
39.7 lb (18.0 kg). Each AC power supply weighs 31.0 lb (14.06 kg).
To remove the power supplies, starting with the upper power supply:
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to an approved site ESD grounding point. See the instructions for your site.
Switch the circuit breakers on the two-input 160-A, three-input 240-A, or four-input
2.
240-A DC power supply faceplates to the off position (
the AC power supply or six-input DC power supply faceplates to the standby position.
We recommend this even though the power supplies are not connected to power
sources.
Loosen the captive screws on the lower corners of the power supply faceplate
3.
completely.
Twist the ejector handles on the upper corners of the faceplate counterclockwise to
4.
unseat the power supply.
Grasp the handle on the power supply faceplate and pull firmly to start removing the
5.
power supply. Slide it halfway out of the chassis (see
CAUTION: Be prepared to support the full weight of the power supply as
you remove it from the router.
Place one hand underneath the power supply to support it and slide it completely out
6.
of the chassis.
Repeat the procedure for the other power supply.
7.
NOTE: Figure 57 on page 103
but the procedure also applies to the three-input 240-A DC power supply,
four-input 240-A DC power supply, or six-input DC power supply.
O ), or the power switches on
Figure 57 on page
shows the two-input 160-A DC power supply,
Copyright © 2013, Juniper Networks, Inc.
103).