IBM TotalStorage DS4000 EXP700 Installation, User's, And Maintenance Manual page 60

Figure 17. Replacing a power-supply CRU
2. Close the lever until the pull-ring latch locks in place. Make sure the lever locks
3. Repeat steps 1 and 2 to replace the second power supply.
Complete the following steps to replace the fan unit CRUs that you removed:
1. Place the fan CRU in front of the fan bay.
2. Ensure that you move the fan latch towards the exterior of the storage
Figure 18. Replacing a fan CRU
3. If the latch does not automatically lock when you have successfully inserted the
4. Repeat steps 1 through 3 to replace the second fan.
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IBM TotalStorage DS4000 EXP700 and EXP710 Storage Expansion Enclosures: Installation, User's, and Maintenance Guide
Lever
into place in the storage expansion enclosure chassis.
expansion enclosure (away from the power supply and ESM CRUs) before you
insert the fan. Hold the latch in the open position while inserting the fan unit into
the fan bay.
The open side of the fan CRU faces the power supply and ESM CRUs. If the
fan does not go into the bay, rotate it 180°. (See Figure 18.)
fan unit into the bay, pull back on the fan slightly and then push it in again until
the latch snaps into place.
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