IBM 9080-M9S Manual page 628

Figure 544. Tightening the center load screw on the heat sink
8. Repeat steps "6" on page 612 through "7" on page 613 until you have removed all of the socket dust
covers from the new system backplane and replaced all of the system processor modules and heat
sinks one at a time in the new system backplane.
9. Install the socket dust covers on the original system backplane.
The socket dust covers protect the sockets during shipping.
a) Lower the socket dust cover over one of the sockets on the system backplane and ensure that the
holes (B) on the socket dust cover align with the two guide pins (A) on the system backplane. Push
straight down until the latches (D) on the socket dust cover engage with the latches (C) on the
backplane. Refer to the following figure.
622 Power Systems: Removing and replacing parts in the 9080-M9S system