Attaching the adjustable rails to the system chassis and to the rack

You must install the rails onto the chassis and into the rack. Use this procedure to perform this task.

About this task

Attention: To avoid rail failure and potential danger to yourself and to the unit, ensure that you have the correct rails and fittings for your rack. If your rack has square support flange holes or screw-thread support flange holes, ensure that the rails and fittings match the support flange holes that are used on your rack. Do not install mismatched hardware by using washers or spacers. If you do not have the correct rails and fittings for your rack, contact your IBM® reseller.
Note: The 1 EIA units in racks are measured in vertical increments of 44.45 mm (1.75 in.) each. Each 44.45 mm (1.75 in.) increment is called an “EIA.” In some countries, the same increment can be referred to as a “U.”
Note: The system requires 1 EIA rack unit (1U) of space.

Ensure that you have the necessary parts to install the rails. The following parts are included with the rail kit:

  • 4 - Philips 6.35 mm (0.25 in.) screws
  • 2 - rack and slide bracket rail assemblies
  • 2 - HMC slide brackets
  • 10 - nut clips for square EIA mounting holes
  • 10 - nut clips for round EIA mounting holes
  • 10 - M5 hex flange screws

Procedure

  1. Remove the rail pieces from the packaging and put them on a work surface.
  2. Identify 1U space in the rack of the HMC.
  3. To attach the slide brackets to the HMC, perform the following tasks:
    1. Identify the right slide bracket.
    2. Align the holes on the right slide bracket with the slide bracket pins located on the right side of the HMC. Ensure that all the pins are aligned with the bracket holes.
    3. Push the HMC slide bracket toward the rear side of the HMC until it is fully locked into position.
    4. Secure the right slide bracket to the right side of the HMC workstation by installing two Philips 6.35 mm (0.25 in.) screws into the screw holes.
    5. Repeat the steps 3.a - 3.d to install the left slide bracket to the left side of the HMC workstation.
  4. Move to the front of the rack.
    1. On the left side, install three nut clips into the three holes on the front edge of the rack in the 1U slot that is designated for the HMC.
      Note: The rail kit includes nut clips for both square and round rack holes. Ensure that you use appropriate nut clips that match the holes in the rack.
    2. Repeat step 4.a on the right side of the rack.
  5. Move to the rear of the rack.
    1. On the left side, install two nut clips into the upper and lower holes on the front edge of the rack in the 1U slot that is designated for the HMC.
      Note: The middle hole must remain empty.
    2. Repeat step 5.a on the right side of the rack.
  6. To install the HMC slide rails into the rack, perform the following steps:
    1. Measure the depth of the rack. The depth must be between 558.8 mm (22 in.) and 863.6 mm (34 in.).
    2. Place the HMC slide rails on a flat surface and locate the preinstalled screws.
      Note: The slide rails have four screw holes.
    3. Loosen the preinstalled screws on the slide rails enough that the rails can be moved in and out easily.
    4. Based on the depth of the rack measured in step 6.a, you must adjust the screws on the rails.
      1. If the depth of the rack is between 558.8 mm (22 in.) and 698.5 mm (27.5 in.), attach the screws to the first and the third holes.
      2. If the depth of the rack is between 698.5 mm (27.5 in.) and 863.6 mm (34 in.), attach the screws to the second and the fourth holes.
        Notes:
        • The first hole is always the hole closest to the end of the slide rail. The third and fourth holes are located close together.
        • Ensure that the screws are loose enough so that the length of the slide rail can be slightly adjusted while it is being installed in the rack.
  7. At the front of the rack, install the HMC slide rails into the rack by performing the following steps:
    1. Locate the left slide rail assembly.
    2. Orient the rail assembly so that the end with the closest screw hole (the first hole) goes into the rack first. Ensure that the screw heads face the inside of the rack. The open slot of the rail assembly is closest to the front of the rack.
    3. On the left side of the rack, connect the flange on the end of the slide rail to the front edge of the rack by using two M5 screws, leaving the middle hole open. Ensure that the rail assembly is left slightly loose on the front of the rack to allow for the HMC to be inserted.
  8. At the rear of the rack, on the right side, pull the free end of the slide rail toward the rear and secure the flange of the slide rail to the rack by using two M5 screws, leaving the middle screw hole open.
  9. Repeat the step 7 and step 8 to install the right slide rail assembly on the right side of the rack.
  10. In front of the rack, install the HMC workstation into the rack by performing the following steps:
    1. Holding the HMC workstation level, insert the slide brackets into the HMC slide rails that you installed in the previous step. Push the HMC forward until the flanges on the front of the HMC are flush with the open screw holes on the front of the rack.
    2. Connect the HMC to the left side of the frame using one M5 screw. Repeat this step on the right side of the rack.
  11. Continue with Installing the system into the rack and connecting and routing power cables.