Removing a Front Fan Tray

To remove a fan tray, follow this procedure:

1. If any PIC cables draped between a PIC and the cable management system are blocking the fan tray you are removing, remove the cables from the slots in the cable management system. Arrange the cables so that they do not block the front of the fan tray, and secure them with temporary fasteners so that they are not supporting their own weight as they hang from the connector. (To make it easier to see the fan trays, Figure 53 does not depict the cable management system on the left side of the router.)

   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.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. Verify that the router is attached to a proper earth ground. For more information about ESD, see Preventing Electrostatic Discharge Damage.
3. Loosen the thumbscrew near the middle of the fan tray faceplate, using a Phillips screwdriver if necessary.
4. Grasp the handle on the faceplate and slowly slide the fan tray out of the chassis just enough to disengage the fan tray connector from the midplane. Do not slide out the fan tray more than 0.5 in. (1.27 cm).

   Caution: To avoid injury and damaging the fan tray, wait until the fans have completely stopped before you continue removing the fan tray from the chassis.

5. Place one hand under the fan tray to support it and slide the tray completely out of the chassis after the fans stop spinning.

Figure 53: Removing a Front Fan Tray