5. The rear fan is attached to the chassis by four rubber mounts. Remove the rear fan by breaking or
cutting the rubber mounts and gently pulling the rear fan out of the chassis.
Note: The new rear fan will have four new rubber mounts attached.
Figure 40. Removing the rear fan
6. Install the new rear fan 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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ThinkCentre Hardware Maintenance Manual