HP ProLiant ML350 Gen9 Maintenance And Service Manual page 44

Completely loosen all screws in the same sequence.
b.
Remove the heatsink from the processor backplate.
c.
To replace the heatsink:
Use the alcohol swab to remove all the existing thermal grease from the processor. Allow the alcohol
1.
to evaporate before continuing.
Remove the thermal interface protective cover from the heatsink.
2.
Install the heatsink:
3.
Position the heatsink on the processor backplate.
a.
Tighten one pair of diagonally opposite screws halfway, and then tighten the other pair of screws.
b.
Removal and replacement procedures 44