IBM 7383 Installation And Service Manual page 279

c. Close and fasten the release lever.
5. Open the fan-locking handle on the replacement fan.
6. Insert the fan into the socket and close the handle to the locked position.
7. Close the fan cage cover.
8. Install and lock the left-side cover (see "Replacing the left-side cover" on page
98).
Chapter 6. Removing and replacing components
261