Remove a PCIe switch board heat sink

Follow instructions in this section to remove a PCIe switch board heat sink. The procedure must be executed by a trained technician.

Procedure

1. Make preparation for this task.
   1. Pull the system shuttle to the stop position.
      1. Press the two blue release latches.
      2. Rotate the two release levers until they are perpendicular to the shuttle.
      3. Pull the shuttle forward until it stops.
         Figure 1. Pulling the system shuttle to the stop position
         
         
   2. Remove the front fan cage. See Remove the front fan cage.
   3. Remove the NVMe drive and PCIe switch board cage. See Remove the NVMe drive and PCIe switch board cage.
2. To remove only the right PCIe switch board heat sink (when looking at the system shuttle from the front), remove the following components:
   1. Remove the integrated diagnostics panel cage.
      1. Loosen the six screws securing the cage.
      2. Slide the cage backward and remove it.
      Figure 2. Integrated diagnostics panel cage removal
      
      
   2. Remove all the hot-swap M.2 drive assemblies. See Remove a hot-swap M.2 drive assembly.
   3. Remove the M.2 drive cage. See Remove the M.2 drive cage and backplane.
3. To remove only the left PCIe switch board heat sink (when looking at the system shuttle from the front), remove the following components:
   1. Remove the OCP module. See Remove the OCP module.
   2. Remove the system I/O tray.
      1. Loosen the ten screws securing the tray.
      2. Slide the tray backward, and lift it out of the NVMe drive and PCIe switch board cage.
         Figure 3. System I/O tray removal
         
         
4. Remove the PCIe switch board heat sink.
   1. Fully loosen all the screws on the heat sink in the diagonal pattern.
   2. Carefully lift the heat sink from the PCIe switch board.
      Note

      Loosen or tighten the screws with a torque screwdriver set to the proper torque. For reference, the torque required for the screws to be fully loosen or tighten is 0.9 newton-meters, 8 inch-pounds.

      Figure 4. PCIe switch board heat sink removal
      
      
5. With an alcohol cleaning pad, wipe off any thermal grease from the following components:
   • Heat spreader on the PCIe switch board
   • Bottom of the PCIe switch board heat sink