Replacing the T640 Quiet Lower Front Fan Tray

The lower front fan tray is located below the front air filter. Each quiet front fan tray weighs about 17.8 lb (8.1 kg). The fan trays are hot-insertable and hot-removable. The quiet upper and lower fan trays are not interchangeable with each other. The quiet lower front fan tray is labeled FAN-T-FBOT-S LOWER FANTRAY.

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

Removing the T640 Quiet Lower Front Fan Tray

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 both sides of the fan tray, and pull the fan tray out of the chassis approximately 1 to 3 inches.

   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. Press the two latches located on each side of the fan tray up to release the fan tray from the chassis.
8. 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.

Figure 1: Removing the Quiet Lower Front Fan Tray

Installing the T640 Quiet 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. Locate a replacement quiet lower fan tray labeled FAN-T-FBOT-S LOWER FANTRAY.
3. Grasp the quiet lower front fan tray by its handles and insert it straight into the chassis.
4. Press the two latches located on each side of the quiet lower front fan tray up, and insert the fan tray straight into the lower front fan tray slot.
5. Tighten the captive screws on each side of the quiet lower front fan tray faceplate to secure it in the chassis.
6. Unlock the cable management system and lower it to the fully lowered position.
7. Rearrange the PIC cables in the cable management system. For more information about proper cable arrangement, see Maintaining T640 PICs and PIC Cables.

Figure 2: Installing the Quiet Lower Front Fan Tray