Below you will find step by step instructions for replacing the expansion valve seat in the Profitec Pro 500. Before doing this we recommend unplugging the machine and allowing it to fully cool off.
- 1.5mm Allen Wrench
- 2.5mm Allen Wrench
- 3mm Allen Wrench
- Flathead Screwdriver
1. Remove the panels of the machine, step by step instructions can be found here: Pro 500 Panel Removal
2. You will find the expansion valve in the back of the machine. Unthread the set screw with the 1.5mm allen wrench until the inside valve of the expansion valve can be removed.
Tech tip: You can fully remove the set screw, but we recommend just backing it out all the way - it can be quite tedious to try and get the set screw back in place properly.
3. Remove the expansion valve inside piece with the flathead screwdriver by completely unthreading it. Replace the rubber seat inside and reinstall into the machine. Check out our article on Adjusting the Pro 500 Expansion Valve to make sure your machine is set to the proper pump pressure after you make this repair.