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e. Align the screws on the heat sink with the holes on the heat-sink retention
module.
f. Press firmly on the captive screws and tighten them with a screwdriver,
alternating among the screws until they are tight. If possible, each screw
should be rotated two full rotations at a time. Repeat until the screws are
tight. Do not overtighten the screws by using excessive force. If you are
using a torque wrench, tighten the screws to 8.5 Newton-meters (Nm) to 13
Nm (6.3 foot-pounds to 9.6 foot-pounds).
9. If you are not installing a new microprocessor and a new heat sink, remove
the thermal grease from the heat sink and microprocessor; then, apply new
thermal grease before installation (see "Thermal grease").
10. Install the optional expansion unit, if you removed one from the blade server
to replace the battery (see "Installing an optional expansion unit" on page 80
for instructions).
11. Install the cover onto the blade server (see "Installing the blade server cover"
on page 53).
12. Install the blade server into the BladeCenter unit (see "Installing the blade
server in a BladeCenter unit" on page 50).
Thermal grease
Use this information to determine the guidelines for using thermal grease on a
heat sink and processor.
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 assembly 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.
5. Use the thermal-grease syringe to place nine uniformly spaced dots of 0.02 mL
each on the top of the microprocessor.
Chapter 5. Removing and replacing blade server components
89
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