Lenovo THINKSERVER 3797 - Manual (Page 206)

4. Align the vertical tabs on the fan with the slots on the fan cage bracket.
5. Push the new fan into the fan connector on the system board. Press down on
the top surface of the fan to seat the fan fully.
If you have other optional devices to install or remove, do so now. Otherwise, go to
“Completing the installation” on page 227.
Removing the fan bracket
To replace some components or to create working room, you might have to remove
the fan-bracket assembly.
Note: To remove or install a fan, it is not necessary to remove the fan bracket. See
“Removing a hot-swap fan” on page 196 and “Installing a hot-swap fan” on
page 197.
To remove the fan bracket, complete the following steps.
198 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual