Replacing the T640 Standard Lower Front Fan Tray

The lower front fan tray is located below the front air filter. Each standard front fan tray weighs about 18.6 lb (8.4 kg). The fan trays are hot-insertable and hot-removable. The standard upper and lower fan trays are interchangeable with each other.

1. Removing the T640 Standard Lower Front Fan Tray
2. Installing the T640 Standard Lower Front Fan Tray

Removing the T640 Standard Lower Front Fan Tray

The upper front fan tray is located above the FPC card cage, and the lower front fan tray is located below the front air filter. Each fan tray weighs about 18.6 lb (8.4 kg).

1. Attach an electrostatic discharge (ESD) grounding strap to your wrist, and connect the strap to one of the ESD points on the chassis.
2. Unwrap any PIC cables from the spools on the cable management system and remove the cables from the tray. Arrange the cables so that they do not block the cable management system and tray, and secure them with temporary fasteners so that they are not supporting their own weight as they hang from the connector.

   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.

3. Simultaneously pull the two releases on the cable management system. Lift it up and outward to lock it in place to access the lower fan tray.
4. Rearrange the PIC cables in the cable management system. For more information about proper cable arrangement, see Maintaining T640 PICs and PIC Cables.
5. Loosen the captive screws on the corners of the fan tray faceplate.
6. Grasp the handles and pull the fan tray halfway out of the chassis.

   Warning: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning.

7. When the fans stop spinning, place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.

Installing the T640 Standard Lower Front Fan Tray

1. Attach an electrostatic discharge (ESD) grounding strap to your and connect the strap to one of the ESD points on the chassis.
2. Grasp the fan tray by its handles and insert it straight into the chassis.
3. Tighten the captive screws on each side of the fan tray faceplate to secure it in the chassis.
4. Unlock the cable management system and lower it to the fully lowered position.
5. Rearrange the PIC cables in the cable management system. For more information about proper cable arrangement, see Maintaining T640 PICs and PIC Cables.