IBM Power Systems 9008-22L Manual page 36

Figure 21. Installing the heat sink on the TIM
8. Secure the TIM and heat sink to the socket of the system processor module.
a. Ensure that the heat sink load arms are engaged as shown by (A) in Figure 22.
b. Tighten the center load screw clockwise by using the supplied hex key as shown by (B) in
Figure 22 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 22. Tightening the center load screw on the heat sink
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Power Systems: System processor modules for the 9008-22L, 9009-22A, or 9223-22H