Lenovo ThinkSystem SR860 Setup Manual page 105

Figure 59. Processor and memory expansion tray air baffle removal
Attention: Do not remove or install DIMMs and processors on the processor and memory expansion
tray when the expansion tray is removed, for the instability might cause damages to components.
To remove the processor and memory expansion tray, complete the following steps:
Watch the procedure
A video of this procedure is available at YouTube:
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Step 1. Disconnect all cables connected to the processor and memory expansion tray.
Step 2. Slightly pull out power supply 2.
Attention: Do not remove the processor and memory expansion tray without physically
disconnecting power supply 2.
Step 3. Grasp the handle of the processor and memory expansion tray; then, pull and rotate it upward to
the vertical position. This disengages the expansion tray from the system board.
Step 4. Grasp the handle and slowly lift the expansion tray from the server; then, set it on a flat surface.
https://www.youtube.com/watch?v=pIb0bIyfkDY&=
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Chapter 3 Server hardware setup
97