Lenovo ThinkStation 2551 Hardware Maintenance Manual page 109

5. The rear fan assembly is attached to the chassis by four rubber mounts. Remove the rear fan assembly
by breaking or cutting the rubber mounts and gently pulling the rear fan assembly out of the chassis.
Note: The new rear fan assembly will have four new rubber mounts attached.
Figure 30. Removing the rear fan assembly
6. Install the new rear fan assembly by aligning the new rubber mounts with the corresponding holes in the
chassis and push the rubber mounts through the holes.
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Chapter 10 Replacing FRUs (for machine types: 2551, 2552, 2553, 2554, and 2555)
103