Remove the water loop

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

About this task

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

• Turn off the corresponding DWC tray that you are going to perform the task on.

• Disconnect all external cables from the enclosure.

• Use extra force to disconnect QSFP cables if they are connected to the solution.

• To avoid damaging the water loop, always use the water loop carrier when removing, installing or folding the water loop.

Note

Ensure you have SD665 V3 Neptune DWC Water Loop Service Kit in hand to perform this task.

Prepare the following screwdrivers to ensure you can install and remove corresponding screws properly.

Screwdriver Type	Screw Type
Torx T10 head screwdriver	Torx T10 screw
Torx T20 head screwdriver	Torx T20 screw
Phillips #2 head screwdriver	Phillips #2 screw

Watch the procedure

• A video of this procedure is available at YouTube.

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 0.5-0.6 newton-meters, 4.5-5.5 inch-pounds.

   Figure 2. Water loop screw removal
   
   
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 3. 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 4. 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 torque screwdriver set to the proper torque. 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 5. Processor cold plate label

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

   
   
   

   Figure 6. Processor cold plate removal
   
   
7. Rotate the latch on the water loop carrier to separate the water loop from processors.
   Figure 7. Separate water loop from processor
   
   
8. Carefully rotate the water loop so one half is sitting on top of the other half.
   Figure 8. Folding the water loop
   
   
9. Fasten two captive thumbscrews to secure water loop carriers to each other.
   Figure 9. Tightening captive thumbscrews
   
   
10. Carefully lift the water loop up off the system board and out of the node.
    Figure 10. 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.

After you finish

If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.