Installing A New Blower - Cisco 7000 Hardware Installation And Maintenance

Replacing Internal Components
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Caution
overtemperature condition can result in severe equipment damage.

Installing a New Blower

Install the new chassis blower as follows:
Step 1
Warning
cord. Use extreme caution when working near the backplane; high voltage is present when the
system is operating.
Step 2
Step 3
Step 4
Step 5
5-244 Cisco 7000 Hardware Installation and Maintenance
Using a long Allen wrench, 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 access
this screw. Insert the wrench straight into the hole at a 90-degree angle to the backplane. If
necessary, use a flashlight to locate and guide the wrench to the screw.
When all three screws are loosened, unscrew them from the backplane. These captive
screws are fixed to the blower; do not attempt to completely remove them.
Two air ducts on the blower extend into the two cutouts in the backplane. (See Figure 5-30.)
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 captive screws and ensure that they are free
of the backplane. (They are fixed to the blower, but they should spin freely.)
Pull the blower outward using steady pressure and jogging it until it frees the backplane.
Lift the blower out of the chassis and place it aside out of traffic areas.
Do not replace the front chassis panels until you install a new blower. If the system is
inadvertently turned on without the blower installed, the internal chassis components may
overheat, which can result in severe equipment damage.
Never operate the system if the blower is removed or if it is not functioning properly. An
Ensure that the power supplies are still turned OFF.
Before accessing the chassis interior, turn off the system power and unplug the power
Note the orientation of the two air ducts on the back of the new blower and the two cutouts
in the backplane. The two ducts fit snugly into the backplane cutouts.
Hold the blower with the two air ducts facing away from you, and the three captive screws
along the bottom of the side facing you (in the orientation shown in Figure 5-32). Lay the
connector and wiring on top of the blower to keep it out of the way while you install the
blower.
Place the blower into the front chassis cavity so it rests on the floor of the chassis, then lift
the blower up slightly and align the air ducts with the backplane cutouts.
Push the air ducts into the cutouts. If necessary, wiggle the blower slightly as you push it
inward (the ducts fit snugly into the cutouts) until the edges of the blower meet the
backplane.