IBM 4957-J11, Hardware Installation And Maintenance Manual

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9. Attach the front mounting bracket to the rack post, ensuring that the rail subassembly occupies the
lower 2U portion of the allotted 4U space. The front mounting bracket spring will clip onto the post.
Ensure that the quantity-2 all-in-one rail kit mounting hardware fully seats into the rack post
mounting hole.
10. Secure the front and back rail kit mounting brackets with the three 10-32 panhead screws
provided,on the top and bottom PEM locations on the back mounting bracket, and the bottom PEM
location on the front mounting bracket (total quantity-3). Torque to 3.95 N-m (35 lbf-in).
Chapter 4. Installation 33