Dell EMC PowerEdge R550 Installation And Service Manual page 72

Figure 65. Installing the processor heat sink module
3. Set the anti-tilt wires to the locked position, and then using the Torx #T30 screwdriver, tighten the screws on the PHM in
the order below:
a. Tighten the first screw.
b. Tighten the screw diagonally opposite to the screw you tighten first.
c. Repeat the procedure for the remaining two screws.
d. Return to the first screw to tighten it completely.
Figure 66. Set the anti-tilt wires to the locked position and tighten the screws
72 Installing and removing system components