Remove the water loop

Use this information to remove the water loop in SD650-I 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.
   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), PCIe riser assembly replacement (ConnectX-7 NDR 200), or Remove a PCIe riser assembly (ConnectX-7 NDR 400).
   9. Disconnect the cables from the tray. For power cables, press the latch on the cable connectors. See GPU node cable routing.
2. Remove two Torx T10 screw; then, remove the VR (voltage regulator) clamp plate out of the node.
   Figure 1. VR clamp plate removal
   
   
3. Remove the following screws to loosen the quick connect.

   • Four Torx T10 screws to loosen the quick connect.

   • Nine Torx T10 screws on the rear of the node.

   Figure 2. Quick connect screw removal
   
   
4. Remove water loop screws (23x Torx T10 screws for two nodes) with a torque screwdriver set to the proper torque.

   • 14 Torx T10 screws in GPU node.

   • 9 Torx T10 screws in compute node.

   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.

   Figure 3. Water loop screws removal
   
   
5. Remove GPU OAM cold plate screws (16x Torx T15 screws) with a torque screwdriver set to the proper torque.
   Note

   For reference, the torque required for the screws to be fully tightened/removed is 0.9 +/-0.06 newton-meters, 8+/- 0.5 inch-pounds. The rpm setting is 200 rpm low-speed.

   Figure 4. GPU OAM cold plate screws removal
   
   
6. Release the interface plate with a flat head screwdriver.
   1. There are two notches on the sides of each GPU OAM cold plate for inserting a flat head screwdriver—select the one that is accessible for the flat head screwdriver.
      Figure 5. Notches on GPU OAM cold plate
      
      

      1 Notches

   2. Insert a flat screwdriver into the notch; then, slightly rotate the screwdriver to release the GPU OAM cold plate from the GPU OAM.
   3. Perform Step B on every GPU OAM cold plate to make sure they are all released from GPU OAM.
      Figure 6. Release the GPU OAM cold plate from the GPU OAM
      
      
7. From the front and the rear of the GPU node, find the gaps between the retimer tank on water loop and the carrier base board conduction plate, as shown in the following illustrations. Then, insert the flat head screwdriver into the gaps, and slightly rotate screwdriver to release the two components.
   Figure 7. Separating water loop retimer tank from carrier base board conduction plate – GPU node front
   
   

   Figure 8. Separating water loop retimer tank from carrier base board conduction plate – GPU node rear
   
   
8. Loosen processors properly.
   1. Fully loosen eight Torx T30 captive screws on cold plates in the removal sequence shown on the cold plate label (with a torque screwdriver set to the proper torque).
      Note

      For reference, the torque required for the screws to be fully tightened/removed is 10+/- 2.0 lbf-in, 1.1+/- 0.2 N-m.

      Attention

      To prevent damage to components, make sure that you follow the indicated loosening sequence.
   2. Rotate eight anti-tilt wire bails inwards to the unlocked position.
      Figure 9. Loosening Torx T30 captive screws
      
      
9. Orient two water loop carriers with the guide pins; then, gently put two water loop carriers down and ensure they are seated firmly on the water loop.
   Figure 10. Water loop carrier installation
   
   
10. Tighten water loop carrier screws (31x Phillips #2 screws for two nodes).
    Figure 11. Water loop carrier screws installation
    
    
11. Carefully rotate the water loop so one half is sitting on top of the other half.
    Figure 12. Folding the water loop
    
    
12. Fasten two captive thumbscrews to secure water loop carriers to each other.
    Figure 13. Tightening captive thumbscrews
    
    
13. Remove the processor from the retainer. This process differs by processor SKU. Check the processor SKU and follow the applicable procedure.
    Note

    Do not touch the contacts on the processor.

    For non Intel® Xeon® CPU Max processor

    1. Lift the handle to release the processor from the retainer.

    2. Carefully hold the processor by its edges; then, lift the processor from the retainer.

       Figure 14. Processor removal
       
       

    For Intel® Xeon® CPU Max processor

    1. Insert a flat head screwdriver into the TIM breaking cam on the retainer; then, slightly rotate the flat head screwdriver to release the processor from the retainer.

    2. Carefully hold the processor by its edges; then, lift the processor from the retainer.

       Figure 15. Processor removal (Intel® Xeon® CPU Max processor)
       
       

       1 TIM breaking cam

14. Without putting the processor down, wipe the thermal grease from the top of the processor with an alcohol cleaning pad; then, place the processor on a static protective surface with the processor-contact side up.
15. Remove the processor retainer from the underside of the cold plate.
    Note

    The processor retainer will be discarded and replaced with a new one.
    1. Carefully release the retaining clips from the cold plate.
    2. Lift the retainer from the cold plate.
    Figure 16. Processor retainer removal
    
    
16. Wipe the thermal grease from the bottom of the cold plate with an alcohol cleaning pad.
17. Carefully lift the water loop out of the node.
    Figure 17. Water loop removal