Hello together,
my Krups has been standing on my workbench for some weeks now.
Always when I find time I test and try something new to get the machine running again.
The problem:
The upper brewing stamp almost completely pushes out of the brewing chamber during the rinsing process (and thus probably also during the brewing process). The first O-ring is then completely visible.
Naturally, the water in the brewing chamber then splashes past the brewing piston into the interior of the machine.
The actual coffee outlet at the top of the brewing stamp does not produce a drop of water.
The problem has already been described several times here in the forum.
I have implemented or tested all the points mentioned there, unfortunately without success.
work so far:
- Drainage valve checked and relubricated
- Hose Drainage valve brewing chamber flushed
- Seals of the entire brewing unit replaced
- Hydraulic cylinder dismantled, springs cleaned, new spring steel ring fitted on top (the old one was only available in a few parts), completely fitted with new seals, greased and reassembled
- Water filter cleaned
- Water distributor opened, cleaned and reassembled
- The Crema'dichtung' in the brewing stamp and the sieve in the brewing stamp checked and cleaned
On the problem:
The upper brewing punch is pressed out of the brewing chamber as described above.
Interestingly enough, nowhere water is lost in the machine.
- The hydraulic cylinder is completely sealed at the top and bottom
- At the water distributor also no water outlet
- Also the drainage valve is sealed
Does anyone have an idea what else I could check?
>I basically have only one idea left: to replace the pump.
- Because the pressure in the brewing chamber cannot be too high, otherwise the water pressure would open the crema'valve' in the brewing head and rinsing water would come out of the coffee spout.
- A leak in the hydraulic cylinder should be visible, after all more than 2 drops of water should leak out
As you can see, my assumptions are so correct?
What makes me hesitate:
The dilemma with the machine started with a 'hanging' brewing stamp. The brewing ram got stuck in the brewing chamber and so neither the coffee cake nor the drawer was released.
This problem was solved after cleaning the water distributor and the general overhaul of the hydraulic cylinder.
After the problem with the hanging brewing ram was solved, the problem described here occurred during the test rinse.
Up to the problem with the hanging brewing ram, however, the machine always ran without problems.
Why should the pressure generated by the pump suddenly no longer be sufficient?
That speaks for me again rather for a pressure loss in the hydraulic cylinder.
But where does the pressure/the water go?
Or maybe I installed the springs incorrectly in the hydraulic cylinder and generate too much pressure up?
Could someone send me a picture of a working hydraulic cylinder? I can only find pictures of disassembled cylinders, but they don't give much information about the assembly or the place of the springs.
By the way, it's a pity that such a good machine is so susceptible due to a few cent material costs saved.
2 Euro more invested and the machine would work 10 years without problems. Quality is very rare today
Thanks in advance for every idea and tip!
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