About this task
Attention: Read 
“Installation Guidelines” on page 45 and “Safety inspection checklist” on page 46 to ensure 
that you work safely.
Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static- 
sensitive components in their static-protective packages until installation, and handling these devices with an 
electrostatic-discharge wrist strap or other grounding system.
S014 
CAUTION: 
Hazardous voltage, current, and energy levels might be present. Only a qualified service technician is 
authorized to remove the covers where the label is attached. 
Watch the procedure 
A video of this procedure is available at YouTube: 
https://www.youtube.com/playlist?list=PLYV5R7hVcs- 
DrpxDWLMfgtXO4O6BVYTim
. 
Procedure
Step 1.  Remove the top cover. See 
“Remove the top cover” on page 212.
Step 2.  Disconnect the cables adjacent to the power supply unit air baffle. For proper operation guidelines, 
see 
Chapter 6 “Internal cable routing” on page 217.
Step 3.  Remove the power supply unit air baffle. 
Figure 90. Power supply unit air baffle removal
a.  Loosen the screw on the air baffle.
b. 
Lift the air baffle out of the chassis.
After you finish
If you are instructed to return the old air baffle, follow all packaging instructions and use any packaging 
materials that are provided.
144
ThinkSystem SR635 V3 User Guide