IBM 106 Hardware Installation And Maintenance Manual page 59

Figure 39. Safe−handling thumbnails: inserting the chassis with rails into the rack
14. Extend the middle rail of both the left and right rail kit subassemblies roughly 3" beyond the face of
the rack.
15. Position the chassis with the lift such that the inner rails are lined-up perfectly with the middle rails.
The end of both inner rails should be equidistant from the rack face. To make adjustments to the
alignment, shift the chassis on the left until alignment of both sides is adequate.
Figure 40. Rail slide alignment detail
16. Keeping the chassis stationary, pull the middle rails forward onto the inner rails, ensuring full
engagement of the inner rails onto the middle slide track. Middle slides should slide freely and
smoothly onto inner rails. Difficult middle slide movement during this step typically indicates
misalignment.
17. Middle rails will eventually "click" into place as the service position locks engage. Ensure both sides
engage at the same time, and both inner rails are fully engaged on their respective middle slide
tracks.
18. Carefully and slowly lower the mechanical lift 2"– 3" so that the weight of the chassis now fully rests
on the rail kit. Keep the lift elevation 2"– 3" below the chassis elevation until the enclosure is fully
installed in the rack. This is a safety measure in case the rails are not seated properly, or another
mechanical/integration failure occurs.
19. Locate the inner slide lock springs on both the left and right rail kits, and depress both to disengage
the service protection lock. Continue depressing springs while inserting the chassis far enough to
bypass the locks on both sides.
Chapter 4. Installation 41