Remove the water loop

Use this information to remove the water loop in the SD665 V3 tray.

Procedure

1. Make preparations for this task.
   1. Remove the tray from the enclosure. See Remove a DWC tray from the enclosure.
   2. Remove the tray cover. See Remove the tray cover.
   3. Remove the cross braces. See Remove the cross braces.
   4. Remove the DIMM comb. See Remove a DIMM comb.
   5. Remove memory modules. See Remove a memory module.
   6. Remove the M.2 backplane assembly. See Remove the M.2 backplane assembly.
      Note

      The M.2 backplane cold plate needs to be removed as well.
   7. Remove the drive cage. See Remove a drive cage assembly.
   8. Remove the PCIe riser assembly. Depending on your configuration, see Remove a PCIe riser assembly (ConnectX-6), Remove a PCIe riser assembly (ConnectX-7 NDR 200), or Remove a PCIe riser assembly (ConnectX-7 NDR 400).
2. Remove the ten screws to loosen the quick connect.
   Figure 1. Quick connect screw removal
   
   
3. Remove water loop screws and quick connect screws (14x Torx T10 screws per node) with a torque screwdriver set to the proper torque.
   Note

   • For reference, the torque required for the screws to be fully tightened/removed is 5.0+/- 0.5 lbf-in, 0.55+/- 0.05 N-M.

   • When removing the 1 VR cold plate screws (x2), remove the washers, too. Make sure to keep the washers for future use. (Depending on the configurations, there may not be any washers on the VR cold plate. In this case, there is no need to remove and keep the washers.)

     Figure 2. VR cold plate screws with washers
     
     

   Figure 3. Water loop screw removal

   1 VR cold plate screws (x2)

   
   
   
4. Orient two water loop carriers with the guide pins; then, gently put the two water loop carriers down and ensure they are seated firmly on the water loop.
   Figure 4. Water loop carrier installation
   
   
5. Tighten water loop carrier screws (24x Phillips #2 screws for two nodes).
   Note

   The screw holes on the rear of the carrier are marked with L and R. Select screw holes marked as L when the carrier is on the left node, and R for the right node.

   Figure 5. Water loop carrier screws installation
   
   
6. Remove processor cold plate screws (12x Torx T20 screws per node). Follow the screw sequence specified on the processor cold plate label and loosen the screws with a general screwdriver torque screwdriver. Fully loosen each screw; then, proceed to the next screw.
   Note

   For reference, the torque required for the screws to be fully tightened/removed is 1.12-1.46 newton-meters, 10-13 inch-pounds

   Figure 6. Processor cold plate label

   Fully loosen each screw in this order: 6 > 5 > 4 > 3 > 2 > 1

   
   
   

   Figure 7. Processor cold plate removal
   
   
7. Rotate the latches on the water loop carrier to separate the processor cold plates from processors.
   Figure 8. Separate water loop from processor
   
   
8. Do not tilt the water loop. Keep the water loop horizontal with the tray. Slightly lift up the water loop, and carefully rotate the water loop so one half is sitting on top of the other half.
   Figure 9. Folding the water loop
   
   
9. Fasten two captive thumbscrews to secure water loop carriers to each other.
   Figure 10. Tightening captive thumbscrews
   
   
10. Carefully lift the water loop up off the system board and out of the node.
    Figure 11. Water loop removal
    
    
11. Wipe the thermal grease from the top of the processors with an alcohol cleaning pad.
12. Wipe the thermal grease from the bottom of the cold plate with an alcohol cleaning pad.