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Replacing the Chassis Fan Assembly
Book Title
4-22
Tools Required
You need a 3/16-inch flat-blade screwdriver to remove the fan assembly.
Removing the Fan Assembly
Take the following steps to remove the existing chassis fan assembly:
Step 1 Locate the fan assembly (Figure 4-14), which is installed to the left of the card
cage, under the power supply.
Step 2 Use a flat-blade screwdriver to loosen each of the two captive installation screws
by turning them counterclockwise.
Step 3 When both screws are loosened, unscrew them from the chassis. These captive
installation screws are fixed to the fan assembly; do not attempt to completely
remove them.
Step 4 Grasp the fan assembly with both hands and pull it outward (toward you and
away from the backplane) using steady pressure and jogging it until it frees the
backplane.
Step 5 Lift the fan assembly out of the chassis and place it in a safe place.
If the power has not been turned off, quickly proceed to the following section to reinstall a
fan assembly.
Caution Never operate the system if the fan assembly is not functioning properly or if a
fan assembly is not quickly reinstalled. An overtemperature condition can result in severe
equipment damage.
Installing a New Fan Assembly
Take the following steps to install the new fan assembly:
Step 1 Hold the fan assembly with the two fans facing to the right.
Step 2 Place the fan assembly into the front chassis cavity so it rests on the floor of the
chassis, then lift the fan assembly up slightly and align the top and bottom
guides.