IBM x3950 Problem Determination And Service Manual page 160

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
4. Use a clean area of the cleaning pad to wipe the thermal grease from the
5. Use the thermal-grease syringe to place 16 uniformly spaced dots of 0.01 mL
6. Install the heat sink onto the microprocessor as described in "Removing and
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IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide
sink.
Note: Make sure that all of the thermal grease is removed.
microprocessor; then, dispose of the cleaning pad after all of the thermal grease
is removed.
Microprocessor
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.
installing a microprocessor" on page 141.
0.01 mL of
thermal grease