Removing an M320 Front Fan Tray
The router has two front fan trays. The front fan trays install horizontally in the front of the chassis. Each front fan tray contains four fans. The two front fan trays are interchangeable, but the rear fan tray is not interchangeable with the front fan trays. The fan trays are hot-insertable and hot-removable.
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 11 lb (5.1 kg).
To remove a front fan tray (see Figure 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. For more information about ESD, see Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series Router.
- If you are removing the lower fan tray, perform the following
steps:
- 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 front of 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.
- Simultaneously pull the two releases labeled PULL on the cable management system. Lift it up and outward to lock it in place to access the lower fan tray.
- 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 front of 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.
- Loosen the captive screw on each side of the fan tray faceplate.
- Grasp the handles and pull the fan tray until it
stops.
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.
- Press the tabs on both sides of the fan tray and pull the fan tray halfway out of the chassis.
- 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 a Front Fan Tray
