Installing An Mx2020 Fan Tray - Juniper MX2020 Hardware Manual

Installing an MX2020 Fan Tray

This topic describes how to install the upper or lower fan trays in a MX2020. This procedure applies to
both the standard fan tray and the optimized power fan tray.To install the upper or lower fan tray (see
Figure 212 on page 441
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. Reposition the DC cable manager, if necessary, before installing the upper or lower fan tray:
Unwrap any cables on the DC cable manager and remove the cables from the tray. Arrange the cables
so that they do not block the front of the cable manager, and tray and secure them with temporary
fasteners so that they are not supporting their own weight as they hang from the connector.
3. Loosen the two captive screws on each side of the fan tray access panel, and open.
4. Take each fan tray to be installed out of its electrostatic bag, and identify the slot on the fan tray where
it will be connected.
5. While grasping the handle, place one hand under the fan tray for support, and align it into the slot.
NOTE: When inserting the fan tray observe the correct orientation by the "this side up"
label on the fan tray.
6. Press and hold the latch while guiding the fan tray half way in until it stops.
NOTE: The fan tray has a safety mechanism so that the fan tray cannot be removed in
one motion.
7. Press and hold the latch a second time while inserting the fan tray completely into the router.
8. Tighten the two captive screws on the fan tray faceplate. Apply between 10 lb-in. (1.13 Nm) to 12 lb-in.
(1.35 Nm) of torque to each screw. Do not overtighten the screws.
9. Close the fan tray access panel, and tighten the captive screws to secure it in place. Apply between
10 lb-in. (1.13 Nm) to 12 lb-in. (1.35 Nm) of torque to each screw. Do not overtighten the screws.
10. Reinstall the DC cable manager back into position, if necessary.
and Figure 213 on page 441):
440