IBM pSeries 630 6C4 Service Manual page 592

6. Before installing the system rail assemblies into your rack, you must first determine the type of system
rail assembly shipped with your Model 6C4. To determine the system rail assembly type, do the
following:
a. Unpack the system rail assemblies.
b. Fully extend the inner and middle rail sections of each rail assembly.
c. Does the middle rail section of each system rail assembly have a retaining screw clearance hole
drilled through it as shown in the following illustration? If so, go to "System Rail Assembly (Type 1)"
on page 573.
1 System Rail Assembly (Type 1)
2 Rail to System Retaining Screw
Clearance Hole
d. If your system rail assemblies do not have a clearance hole drilled through the middle rail section,
as shown in the following illustration, go to "System Rail Assembly (Type 2)" on page 576.
1 System Rail Assembly (Type 2)
2 Outer Rail Section
572 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide
3 Middle Rail Section
3 Middle Rail Section
4 Inner Rail Section