Cisco 7000 Replacement Instructions Manual page 12

Replacing the Chassis Blower
Removing the Blower
Remove the existing chassis blower as follows:
Step 1
Step 2
Step 3
Figure 7
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
12 Cisco 7000 and Cisco 7507 Air Filter and Chassis Blower Replacement Instructions
On each installed power supply, turn the power switch to OFF (O) and unplug the power
cord from the power source.
Remove the front panels according to the procedure in the section "Removing and
Replacing the Front Chassis Panels" on page 6.
Locate the blower (see on page 2), which is mounted to the bottom of the backplane, and
the blower power connector (see Figure 7), which is connected to the backplane under the
white power bus bar. Note the orientation of the power connector and its orientation in the
backplane port, with the flat side down.
Blower Power Connector
Purple (+24V)
Black (ground)
Blower
Disconnect the blower's power connector from the backplane by pinching the sides of the
connector inward and pulling the connector out and away from the backplane. Lay the
connector and wiring on top of the blower to keep it out of the way while you remove the
blower.
Using the long T-handle driver or Phillips screwdriver, loosen each of the three captive
screws by turning them counterclockwise two full turns. Use the access hole in the lower
lip of the chassis to guide the driver straight into the hole for the left screw.
When all three screws are loosened, unscrew them completely from the backplane. These
captive screws are fixed to the blower; do not attempt to remove them completely.
Two air ducts on the blower extend into the two cutouts in the backplane. (See .) Grasp the
blower with both hands and pull it outward (toward you and away from the backplane)
while gently rocking it slightly up and down, and left to right, to free the blower ducts from
the backplane.
If the blower does not budge, check the three screws and ensure that they are free (they are
fixed to the blower, but they should spin freely.)
Pull the blower outward using steady pressure and wiggling it until it is free from the
backplane.
Backplane
Blower power connection