6. Place one hand underneath the power supply to support it and slide it completely out
of the chassis.
7. Repeat the procedure for the other power supply.
NOTE: Figure 63 on page 171 shows the two-input 160-A DC power supply,
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.
Figure 63: Removing a Power Supply Before Installing the Router
Attaching the T640 Router Installation Handle
To assist you with the installation of the T640 router, attach the installation handle over
the power supply slots of the chassis. To remove the power supplies and attach the
handle, starting with the upper power supply:
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to an approved site ESD grounding point. See the instructions for your site.
2. Switch the circuit breakers on the two-input 160-A, three-input 240-A, or four-input
240-A power supply faceplate to the off position (O), or switch the power switch on
the six-input DC power supply to the standby position. We recommend this even
though the power supplies are not connected to power sources.
3. Loosen the captive screws on the lower corners of the power supply faceplate
completely. Twist the ejector handles on the upper corners of the faceplate
counterclockwise to unseat the power supply.
4. Twist the ejector handles on the upper corners of the faceplate counterclockwise to
unseat the power supply.
171Copyright © 2017, Juniper Networks, Inc.
Chapter 18: Installing the T640 Router With a Mechanical Lift
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