This forum contains various threads with photos on how to perform various maintenance and repairs on your S1.
- Posts: 55
- Joined: Mon Jan 14, 2008 1:01 pm
- Location: Chicago 'burbs
My Mini was leaking water from the group after brewing a shot. After repeated detergent flushes intended to dissolve any coffee "stuff" (I usually do a detergent flush once a month - my routine for many years) failed to fix the problem I took the valve apart and took a few pictures to document the process. This is quite easy to do.
- Unplug the machine
Remove the cup warmer tray
Loosen the sides
Unscrew the front control panel assembly
Remove the 3-way valve vent piping
Unscrew the stainless steel 3-way valve from the solenoid (it is not necessary to remove the electrical connection to the solenoid
Unscrew the 3-way valve from the housing that attaches to the group
Remove the 4 cap screws that attach the housing to the group
I was expecting to see some scale particles but was surprised to see only a thin film on the valve plug and seat. I gave the wetted parts a hot detergent scrub, rinsed and reassembled it. I worked like a charm. It would only need a small passage for air to backflow from the vent tube to the group which would allow water to drain but I didn't see any obvious culprit.
Attached are some photos showing the process and the parts.
- overview.jpg (728.36 KiB) Viewed 3212 times
- Housing that attaches to the group
- 20160528_130348.jpg (88.72 KiB) Viewed 3212 times
- 3-way valve disassembled
- 20160528_125452.jpg (80.33 KiB) Viewed 3212 times
- View of housing before removal
- 20160528_125543.jpg (56.39 KiB) Viewed 3212 times