Lenovo 7D31, Maintenance Manual

Page: 198 / 274

Figure 105. Installing a PHM
Rotate the anti-tilt wire bails inward.
Align the triangular mark and four Torx T30 nuts on the PHM with the triangular mark and
threaded posts of the processor socket; then, insert the PHM into the processor socket.
Rotate the anti-tilt wire bails outward until they engage with the hooks in the socket.
Fully tighten the Torx T30 nuts
in the installation sequence shown
on the heat-sink label.
Tighten the screws until they stop; then, visually inspect to make sure that there is no gap
between the screw shoulder beneath the heat sink and the processor socket. (For reference, the
torque required for the fasteners to fully tighten is 1.1 newton-meters, 10 inch-pounds).
After this task is completed
Proceed to complete the parts replacement (see “Complete the parts replacement” on page 218).
Processor and memory expansion tray replacement
Follow instructions in this section to remove or install the processor and memory expansion tray and
corresponding air baffles.
Remove the processor and memory expansion tray
Follow instructions in this section to remove the processor and memory expansion tray.
About this task
Attention:
• Go over “Installation Guidelines” on page 107 to ensure that you work safely.
• Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
“Power off the server” on page 12).
190
ThinkSystem SR850 V2 Maintenance Manual