IBM 7383 Installation And Service Manual page 336

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System x3500 M4 Type 7383: Installation and Service Guide
b. Align the installation tool with the alignment pins on the microprocessor
socket and lower the tool on the microprocessor. The installation tool rests
flush on the socket only if aligned correctly.
c. Twist the handle on the installation tool clockwise.
d. Lift the microprocessor out of the socket.