IBM 9117-MMB User Manual page 34

Figure 22. Replacing a fan
c. Tighten the thumbscrew (D) as shown in Figure 22.
6. To replace the power supply, with the locking handle (A) in the open position, push the power
supply into the expansion unit as shown in Figure 23 on page 23.
7. Close the locking handle (A) until the power supply locks into position.
22
Power Systems: Power supplies for the 9117-MMB, 9117-MMC, 9179-MHB, or 9179-MHC