IBM Power System 8247-42L Manual page 58

Figure 42. Installing the heat sink
19. Secure the heat sink:
a. Upon placing the heat sink on the system processor module, ensure that the heat sink load arm
on the side of the heat sink becomes engaged, as shown in Figure 43 on page 41.
b. While you are holding the heat sink in place, use the supplied 5.5 mm nut driver (part number
43W3032) to tighten the heat sink actuation screw. Turn the screw clockwise a few turns.
c. Is the load arm still engaged?
Yes: Continue turning the actuation screw clockwise until a firm stop is reached. If a torque
tool is available, tighten the screw to 2.5 nm.
No: Unscrew the actuation screw. Hold the load arm onto the heat sink while you are
tightening the screw until a firm stop is reached. If a torque tool is available, tighten the
screw to 2.5 nm.
Note: If during this step, the heat sink moves noticeably, it is likely that the load arm is not
engaged. If the heat sink moves noticeably, unscrew the actuation screw and hold the load arm
onto the heat sink while you are tightening the screw until a firm stop is reached. If a torque tool
is available, tighten the screw to 2.5 nm.
40
System backplane