Lenovo ThinkCentre 7515 Hardware Maintenance Manual page 122

To replace the rear fan assembly, do the following:
1. Remove the computer cover. See "Removing the computer cover" on page 86.
2. Locate the rear fan assembly. See "Locating components" on page 88.
3. Disconnect the rear fan assembly cable from the system fan connector on the
4. The rear fan assembly is attached to the chassis by four rubber mounts.
Figure 33. Removing the rear fan assembly
5. Install the new rear fan assembly by aligning the new rubber mounts of the
116
Hardware Maintenance Manual
system board. See "Locating parts on the system board" on page 89.
Remove the rear fan assembly by breaking or cutting the rubber mounts and
gently pulling the rear fan assembly out of the chassis.
new rear fan assembly with the holes on the chassis and push the rubber
mounts through the holes.
Note: The new rear fan assembly you received will have four new rubber
mounts attached.