Dell PowerEdge R900 - Manual (Page 117)

Installing System Components 117
2 Open the system. See "Removing the Top Cover" on page 60.
3 Remove the cooling shroud. See "Removing the Cooling Shroud" on
page 76.
4 Remove the processor heat sinks. See "Removing a Processor Heat Sink" on
page 101.
5 Remove the hard drives. See "Hard Drives" on page 62.
6 Disconnect the SAS A cable from the SAS backplane. See Figure 3-26.