Lenovo ThinkStation P300 Hardware Maintenance Manual page 190

Figure 174. Pivoting the drive bay assembly upward
5. Disconnect the system fan cable from the power fan connector on the system board. See "Locating
parts on the system board" on page 79.
6. The system fan is attached to the chassis by four rubber mounts. Remove the system fan by cutting
the rubber mounts and lifting the system fan out of the chassis.
Note: The new system fan will have four new rubber mounts attached.
Figure 175. Removing the system fan
7. Install the new system fan by aligning the new rubber mounts that came with the new system fan with the
corresponding holes in the chassis, and then push the rubber mounts through the holes. Then, carefully
pull on the tips of the rubber mounts from the bottom until the new system fan is secured in place.
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ThinkStation P300 Hardware Maintenance Manual