EQ 5 Brewing unit

Hi guys

Sorrowful topic I know

Have 2x an EQ 500 integral

Unfortunately, the same problem with both! Brewing unit stuck!
I know the trick with the door, is a short solution! After I thought I disassemble the machine and adjust the engine after, which I also did! In my opinion also right so, with the holes of the pinions, etc.
After the first brewing process the same problem again!
After endless attempts unsuccessful!

Now my question to you, has someone solved the problem finally without door override?
To me it just seems like the engine goes too far.

I thank you already for your trouble
Good evening to you

It's a lack of maintenance, you need to grease the o-ring of the percolation unit with the special grease sold by Siemens once a month