Cisco 7000 Series Hardware Installation And Maintenance page 215

Internal Components
Replacing
Step
Step
Step
Step
Step
Step
Step
Caution
overtemperature
New
Blower
Installing
Install
Step
Warning
cord Use
system
Step
Step
Step
Step
7000 Hardware
5-70 Cisco
Using long Allen wrench
two
counterclockwise
full
wrench
Insert the
screw
this
use
necessary flashlight
When
three
all
screws
are
are fixed the
blower
screws to
Two blower
ducts on the
air
blower
with both
Grasp the
backplane while
gently
from
ducts the
backplane
blower
budge
the does not
If
They
of the
backplane
blower outward
Pull the
blower
the out of the chassis
10 Lift
Do
the front chassis panels
not replace
11
turned
on
inadvertently
which
can result
overheat
Never
the system
operate
condition can
result
new blower
chassis
the
as
the
Ensure
that power
supplies
the chassis interior turn off the
Before
accessing
when
extreme caution
operating
is
Note
the orientation of the
The two
the
in
backplane
Hold blower
the with the
bottom
the of the side facing
along
and
on
connector
wiring
blower
blower the front chassis cavity
into
Place the
and
blower up
the
slightly
Push
the ducts the cutouts
air into
inward the
ducts
snugly
fit
backplane
and Maintenance
Installation
loosen each of the three captive
Use hole in the lower
turns the access
into the hole
at
straight
and wrench
locate the
to guide
unscrew them from
loosened
do
not attempt
to completely
two
extend into the cutouts
hands and outward
it
pull
up and down
it
rocking
slightly
check
the three captive
are fixed the blower but they
to
and
using steady
pressure
and
aside out of
it
place
until install
you
blower
without the
installed
damage
in severe
equipment
removed
blower is
the
if
damage
in severe
equipment
follows
OFF
turned
are
still
near the
working backplane
two on back
ducts the
air
ducts the backplane
snugly into
fit
two
ducts
air facing
away
in
the orientation
you
blower
top of the
to
keep
rests
so it
align the ducts with
air
If
wiggle
necessary
into the cutouts
until
by
screws turning
of the chassis
lip
the backplane
to
90-degree angle
screw
the
to
These
the
backplane
them
remove
See
the backplane
in Figure
toward you and away from
and
free the
left to to
right
and
that
screws ensure they
should
freely
spin
the
until frees
it it
jogging
areas
traffic
new
the
blower If
system
the chassis
internal components
not functioning
if is
or properly
it
and
unplug
system power
when
high voltage
is
present
blower and
new the
of the
cutouts
the three captive
from and
you
shown 5-26
in
Figure
out of the while
way
you
it
on the of the chassis
floor
the backplane cutouts
blower
the
as
slightly
blower meet
the edges of the
them
to access
If
captive
5-24
the
blower
are free
backplane
is
may
An
the
power
the
two
cutouts
screws
the
Lay
the
install
then
lift
you push
it
the