Attaching the fixed 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 unit 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 - Inner rails
  • 2 - HMC support rails
  • 2 - Nut clips for square EIA mounting holes
  • 2 - Nut clips for round EIA mounting holes
  • 8 - 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 inner rails to the HMC, perform the following tasks:
    1. Identify the right inner rail.
    2. Align the holes on the right inner rail with the inner rail pins located on the right side of the HMC. Ensure that all the pins are aligned with the inner rail holes.
    3. Push the HMC inner rail toward the front side of the HMC until it is fully locked into position.
    4. Secure the right inner rail 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 inner rail to the left side of the HMC workstation.
  4. Move to the front of the rack. On the left side, install one nut clips into the hole 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.
  5. Move to the rear of the rack. On the left side, install one nut clips into the middle hole on the front edge of the rack in the 1U slot that is designated for the HMC.
  6. At the front of the rack, install the HMC support rails into the rack by performing the following steps:
    1. Align the pins of the support rails above and below the nut clip you installed in the previous step..
    2. On the right side of the rack, connect the flange on the end of the support rail to the front edge of the rack by using two M5 screws into the upper and lower screw holes, leaving the middle screw 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.
  7. At the rear of the rack, on the right side, pull the free end of the support rail toward the rear and secure the flange of the support rail to the rack by using two M5 screws, leaving the middle screw hole open.
  8. Repeat the step 6 and step 7 to install the right support rail assembly on the right side of the rack.
  9. 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 inner rails into the HMC support 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.
    Note: If present, remove the orange shipping brackets that are attached to the rear of the system and reinstall the screw back in.
  10. Continue with Installing the system into the rack and connecting and routing power cables.