Dell EMC PowerEdge XR11 Installations- Und Servicehandbuch Seite 68

Figure 57. Installing the processor and heat sink (PHM)
3. Set the anti-tilt wires to the locked position (outward position), and then using the Torx T30 tool, tighten the captive nuts (8
in-lbf) on the heat sink in the order below:
a. Tighten the first nut completely.
b. Tighten the nut diagonally opposite to the nut you tighten first.
c. Repeat the procedure for the remaining two nuts.
68 Installieren und Entfernen von Systemkomponenten