IBM Power System 8247-42L Manual page 102

Figure 85. Removing the system processor socket cover
7. Remove dust and debris from the system processor socket in the replacement system backplane.
a. If dust or debris is present on the system processor socket, use the supplied air pump (part
number 45D2645) to clean the socket. If your air pump is not assembled as shown in Figure 86
on page 85, fasten the tip onto the bulb. Blow small bursts of air from the center toward the sides
of the socket, as shown Figure 86 on page 85.
b. Repeat step 7 for the remaining system processor socket.
84
System backplane