How to overhaul the drain valve

ID: 173248

Description: The drain valve in Jura machines is largely...

Steps:

  1. The brewing group has already been removed and disassembled. Now it's time for the drainage valve.
  2. There will be many pictures
  3. All you need a small flathead screwdriver.
    4. Step image Step image Step image
  4. Images front and back
    5. Step image Step image Step image
  5. Pull off the clamp and pull out the inlet hose. At the end there is a seal, it often gets stuck in the drainage valve. Swap them out when reassembling.
  6. The angled inlet is not installed on all models. The hose is then plugged in directly. As the installation is somewhat tedious, you can also install the part later.
    7. Step image Step image Step image
  7. Pull out the clip on the docking tube
  8. Pry out the valve body. Make sure the white cap slides out of its hole.
  9. Detach the docking nozzle.
  10. The seal of the docking connector is subject to heavy loads as it slides into the opening on the brewing piston with every brewing process. It is slightly thinner than all other hose seals. If you accidentally fit the wrong seal, the drain valve will no longer work.
    11. Step image Step image Step image
  11. The white cap holds the valve tappet and pulls it out. If it is cracked, it can no longer grip it properly. It therefore remains in the position that the cap holds open for it at the moment it happens to be in. The drainage valve no longer works.
  12. Check whether the cap is still firmly in place. If this is not the case, you will need to replace it with a new cap, preferably made of metal.
  13. Of course, you can also get a new drainage valve.
    14. Step image
  14. Detailed photos.
  15. The position of the sealing rings are marked green in picture 3.
  16. The sealing ring on the docking socket is marked in red in picture 2. It is especially important. It's a little thinner than the other two.
  17. The brackets are marked in red.
    18. Step image Step image Step image
  18. Here all the parts of the valve.
    19. Step image Step image Step image
  19. Here is the entire valve in one picture
    20. Step image
  20. When assembling, make sure that the lips of the seals point to the pressure side, i.e. inward, and the flat side outward.
  21. When installing, make sure that the pressure hose runs through the slot in the valve carrier.
  22. Apply a thin layer of food-safe silicone grease to the seals before installation.
    23. Step image Step image Step image
Back