IBM 436854u Service Guide - Page 97

Removing the rear system fan Attention: v Replace a failed fan within 48 hours. v To ensure proper cooling and airflow, do not operate the server for more than 30 minutes with the side cover removed. To remove the rear system fan, complete the following steps: 1. Turn off the server and all attached devices; then, disconnect all power cords and external cables. 2. Unlock and remove the side cover (see "Removing the side cover" on page 52). 3. Remove any adapters that impede access to the fan and the fan connector on the system board (see "Removing an adapter" on page 58). 4. Disconnect the fan cable from the system board, making a note of where the cable was connected, for later installation. 5. Grasp the fan with both hands and pull firmly, extending the rubber grommets. The grommets will be pulled through the holes in either the fan or the chassis and can then be removed. Rubber grommets Rear system Fan 6. Pull the fan up and out of the chassis. 7. If you are instructed to return the fan, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you. Chapter 4. Removing and replacing server components 79