To install the fan tray (see Figure 7 on page 8):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2. Grasp the fan tray on each side, and insert it straight into the chassis. Note the correct
orientation by the "this side up" label on the top surface of the fan tray.
3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis.
Figure 7: Reinstalling a Fan Tray
Replacing the MX960 Fan Trays
It is required to upgrade both MX960 fan trays, as well as the fan filter tray.
NOTE: To prevent overheating, one fan tray should always be installed and
operational during the upgrade process.
To remove the upper or lower fan tray:
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2. Loosen the captive screw on each side of the fan tray faceplate.
3. Grasp both sides of the fan tray and pull it out approximately 1 to 3 inches.
Copyright © 2010, Juniper Networks, Inc.8
Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays