IBM Xseries 345 8670 Maintenance Manual page 76

10. If you have other options to install or remove, do so now; otherwise, go to
66
xSeries 345 Type 8670: Hardware Maintenance Manual and Troubleshooting Guide
8. Install a heat sink on the microprocessor:
Thermal grease
a. Remove the plastic protective cover from the bottom of the heat sink.
Attention:
v Do not set the heat sink down after you remove the plastic cover.
v If the thermal-grease protective cover (for example, a plastic cap or tape
liner) is removed from the heat sink or fan sink, do not touch the thermal
grease on the bottom of the heat sink or fan sink or set down the heat
sink or fan sink.
Note: Removing the heat sink or fan sink from the microprocessor
destroys the even distribution of the thermal grease and requires
replacing the thermal grease. Setting down the heat sink or fan
sink onto any surface when the thermal-grease protective cover is
removed will contaminate the thermal grease. If the thermal
grease becomes contaminated with particles, it must be replaced.
For information about replacing contaminated thermal grease on the
heat sink or fan sink, contact IBM Integrated Technology Services. For
the most up-to-date phone numbers, go to
http://www.ibm.com/planetwide/, or in the U.S. and Canada, call
1-800-IBM-SERV (1-800-426-7378).
Please have the following information ready when you call:
– Machine type and model
– Serial number of your server or computer
b. Align and place the heat sink on top of the microprocessor with the thermal
grease side down. Press firmly on the heat sink.
c. Secure the heat sink to the microprocessor by tightening the captive
screws. You must alternate the tightening of the captive screws to secure
the heat sink to the microprocessor. Turn one screw a few turns and then
turn the other screw a few turns, alternating between the screws until the
heat sink is secure.
Attention: If you do not alternate the tightening of the two captive
screws, you might damage the microprocessor. Ensure that the screws are
completely tightened; otherwise, the server will not function properly.
9. Install the air baffle over the microprocessor section of the system board.
"Installing the server cover and bezel" on page 71.
Heat sink