IBM 8863 Service Guide - Page 143

Thermal, grease

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9. Install the air baffle in the microprocessor tray. 10. Install the microprocessor tray in the server: a. Make sure that the microprocessor-tray release latch is open; then, push the microprocessor tray into the server. b. Close the tray levers and make sure they are securely latched. c. Close the microprocessor-tray release latch. d. Reinstall the fans and memory cards in the server. 11. Reinstall the top cover and bezel. 12. Reconnect external cables and power cords. Thermal grease The thermal grease must be replaced whenever the heat sink has been removed from the top of the microprocessor and is going to be reused or when debris is found in the grease. To replace damaged or contaminated thermal grease on the microprocessor and heat sink, complete the following steps: 1. Place the heat sink on a clean work surface. 2. Remove the cleaning pad from its package and unfold it completely. 3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat sink. Note: Make sure that all of the thermal grease is removed. 4. Use a clean area of the cleaning pad to wipe the thermal grease from the microprocessor; then, dispose of the cleaning pad after all of the thermal grease is removed. Microprocessor 0.01 mL of thermal grease 5. Use the thermal-grease syringe to place 16 uniformly spaced dots of 0.01 mL each on the top of the microprocessor. Note: 0.01mL is one tick mark on the syringe. If the grease is properly applied, approximately half (0.22 mL) of the grease will remain in the syringe. 6. Install the heat sink onto the microprocessor as described in "Removing and installing a microprocessor" on page 124. Chapter 4. Removing and replacing server components 127

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9.
Install
the
air
baffle
in
the
microprocessor
tray.
10.
Install
the
microprocessor
tray
in
the
server:
a.
Make
sure
that
the
microprocessor-tray
release
latch
is
open;
then,
push
the
microprocessor
tray
into
the
server.
b.
Close
the
tray
levers
and
make
sure
they
are
securely
latched.
c.
Close
the
microprocessor-tray
release
latch.
d.
Reinstall
the
fans
and
memory
cards
in
the
server.
11.
Reinstall
the
top
cover
and
bezel.
12.
Reconnect
external
cables
and
power
cords.
Thermal
grease
The
thermal
grease
must
be
replaced
whenever
the
heat
sink
has
been
removed
from
the
top
of
the
microprocessor
and
is
going
to
be
reused
or
when
debris
is
found
in
the
grease.
To
replace
damaged
or
contaminated
thermal
grease
on
the
microprocessor
and
heat
sink,
complete
the
following
steps:
1.
Place
the
heat
sink
on
a
clean
work
surface.
2.
Remove
the
cleaning
pad
from
its
package
and
unfold
it
completely.
3.
Use
the
cleaning
pad
to
wipe
the
thermal
grease
from
the
bottom
of
the
heat
sink.
Note:
Make
sure
that
all
of
the
thermal
grease
is
removed.
4.
Use
a
clean
area
of
the
cleaning
pad
to
wipe
the
thermal
grease
from
the
microprocessor;
then,
dispose
of
the
cleaning
pad
after
all
of
the
thermal
grease
is
removed.
Microprocessor
0.01 mL of
thermal grease
5.
Use
the
thermal-grease
syringe
to
place
16
uniformly
spaced
dots
of
0.01
mL
each
on
the
top
of
the
microprocessor.
Note:
0.01mL
is
one
tick
mark
on
the
syringe.
If
the
grease
is
properly
applied,
approximately
half
(0.22
mL)
of
the
grease
will
remain
in
the
syringe.
6.
Install
the
heat
sink
onto
the
microprocessor
as
described
in
“Removing
and
installing
a
microprocessor”
on
page
124.
Chapter
4.
Removing
and
replacing
server
components
127