Removing the rear system fan cage assembly with baffleAttention:v Replace a failed fan within 48 hours.v To ensure proper cooling and airflow, do not operate the server for more than 30minutes with the side cover removed.To remove the rear system fan cage assembly with baffle, complete the followingsteps:1. Read the safety information that begins on page vii and “Installation guidelines”on page 95.2. Turn off the server and all attached devices; then, disconnect all power cordsand external cables.3. Unlock and remove the side cover (see “Removing the side cover” on page100).4. Disconnect the rear system fan cage assembly cable from the system board,making a note of where the cable was connected for later installation.5. Pull outward on the spring-loaded lock pin and slide the rear system fan cageassembly to the left to release it from the mounting tabs on the chassis; then,remove it from the server.6. If you are instructed to return the fan cage assembly, follow all packaginginstructions, and use any packaging materials for shipping that are supplied toyou.Installing the rear system fan cage assembly with baffleAttention:v Replace a failed fan within 48 hours.v To ensure proper cooling and airflow, do not operate the server for more than 30minutes with the side cover removed.To install the rear system fan cage assembly with baffle, complete the followingsteps:1. Unlock and remove the side cover (see “Removing the side cover” on page100).2. Insert the rear system fan assembly retainer tabs into the correspondingmounting tabs on the chassis; then, slide the rear fan cage assembly to theright until it locks into the mounting tabs on the chassis.124 System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
