Sun Microsystems Enterprise 250 Owner's Manual page 185

Hold the tray at the center so it pulls out evenly.
Figure 8–2
What Next
To replace the fan tray assembly, complete this task:
4 "How to Install the Fan Tray Assembly" on page 151
How to Install the Fan Tray Assembly
What to Do
1. Align the fan tray assembly with the upper and lower fan tray guides.
Hold the fan tray so that the arrow on its outer edge is facing up.
2. Slide the fan tray into the top and bottom guides.
Hold the tray at the center so that the tray slides into the guides evenly.
Removing and Installing Miscellaneous Assemblies
151