IBM Power System S822LC Manual page 170

Figure 176. Installing the heat sink on the gray-colored TIM
Continue with step 12.
12. Secure the TIM and heat sink to the processor socket.
a. Ensure that the heat sink load arms are engaged as shown by (A) in Figure 177.
b. Tighten the center load screw clockwise by using the supplied hex key as shown by (B) in
Figure 177 until a firm stop is reached. If the heat sink moves noticeably, the load arms are not
engaged. Unscrew the center load screw and repeat this step again.
Figure 177. Tightening the center load screw on the heat sink
154
Power Systems: Servicing the IBM Power System S822LC (8335-GTB)