A lot of water in the marc container, Surpresse S75

Hello,

I'm new here. My name is Thomas, I come from Berlin, am 25 years old and study mechanical engineering.

My girlfriend and I took over a used Siemens Surpresso S75 from her parents a few weeks ago. The machine is used properly and has about 12500 covers. After a few smaller obstacles (e.g. the outlet was blocked) the machine actually ran very well.

But since I was sure that there had never been any major maintenance during the life of the machine, I wanted to eliminate typical problems. I ordered a drainage valve with expansion chamber and an outlet valve. I have also purchased a gasket kit.

The two valves I installed, the gasket set not yet (did not have a sufficiently long Torx). Unfortunately I have the following problems since then:

- a lot of water in the marc container (not from the covers, I am quite sure that it runs in during the automatic rinsing processes)
- the coffee is relatively thin, with the brew advance comes first much darker coffee with crema, then only light, almost transparent something...

The water hardness is set to 3, the degree of grinding is at the moment I think the coarsest.

Has any of you a hint where I might have made a mistake?

Siemens Surpresso S75 (TK69009)

Good evening,

it gives at "juraprofi.de" a good guide about revising the drainage valve & brewing unit. Somewhere you'll have made a mistake. So in the service manuals under Siemens Suppresso everything is explained in detail.

Greeting HWS

Hello HWS,

>I have worked according to these instructions. I wanted to ask what could be the cause so that I could narrow down the error a little. So I just have to take half the machine apart again and unfortunately don't know what to look for.

Mir notices that the title contains a disgusting typo - how can I adjust it?

thank you and greetings,

Thomas

I just checked again - I can definitely exclude the drainage valve. Apart from the fact that it is new, it would also not be able to transport water into the pomace container during the construction of the machine. The expansion chamber is about 4 cm below the edge of the trestle bowl...

However, I could observe the following. After switching on, the machine usually rinses. Brownish water comes out of the outlets, and the brewing group is cranked through once. During this process - the cranking - water comes from a component of the brewing group and runs directly into the pomace container. I have the gasket set, and I'm going to start overhauling the brewing group later. I don't know if this is the root of all evil.

Gruß Thomas

Hello Thomas,

You should also check the brewing unit again... what you really like to break is the hold-down at the top of the brewing unit, if you pull the one in the middle upwards, there is often a crack to see... but for that there is a repair plate.

You can check the coffee inlet and outlet nozzle quietly by just wiggling it... sometimes the cracks have and then break off.

One cause for too much water in the drip tray and thin coffee can also be a defective control system of the drive, this happens relatively often.

To overhaul the control system of the drive you remove the drive again, remove the clipped cover on the drive motor, exchange the two micro switches underneath and also very important...slightly grease the cam disc on the entire circumference with a lightly running grease.

Then she runs great again.

There's nothing else to worry about but cause. If you replace the BG with new gaskets, unscrew the brewing sieve as well. Hold this against light and check whether the tiny holes are all permeable. I always take a small pin and pierce the holes.

Greeting HWS

Hello both of you,

I'll take a look at the BG again and change the gaskets.

The drive doesn't sound impossible, somehow the whole process sounds very forced and exhausting for the engine. Well, let's see what happens.

Thank you for the tip


Gruß Thomas

P.s. I was just looking for a picture of coffee enema - not a good idea

If the whole thing sounds very forced, then a new drive motor wouldn't hurt either... you can get it on eBay for a little money...

Search there for "Drive motor Siemens Surpresso"

When replacing, please make sure that the two small metal balls at the top and bottom of the motor do not fall out and get lost.

Aloha,

On ebay I only find motors for Siemens Surpresso S20, S40 and S60. Are you sure I can use this on the S75? Only if I get the problem solved with the excess water in the marc container. Still the engine works, one after the other...

Thanks and greetings,

Thomas

The engine fits universally... there is only one engine for all models.

Hello,

now first clean the BE and grease it with silicone grease, then the thing will do its job again!

Greß HWS

Moin,

the manual at juraprofi.de was unfortunately for another model. It took me a while until I noticed that - then everything was already in individual parts. Nevertheless, I managed the way back, I renewed and greased the seals at the inlet and outlet nozzles, at the strainer and at the crema valve. I tried to clean the rest of the BG.

Now I have no more water in the marc container, at least it doesn't look like it after the first 5 covers. So far so good - thanks already once for your help!

I haven't noticed any serious changes in the coffee itself. Perhaps the degree of grinding is also the reason for the somewhat "thin" impression. I will increment this one step by 1 or 2 steps to see how the result changes. In any case, the pomace contains a great deal of moisture - but I have read that this does not necessarily have to be a problem. I can take a picture afterwards.

That the engine fits all Surpresso models is of course very good. Siemens has been involved in the modularization process. Next month maybe.

Greeting Thomas

Hello,

the pomace should be grained like normal sugar. If you set the grinder too fine, the brewing sieve will clog more easily. I hope you've also looked through the individual little holes in the sieve.

Greetings HWS

Yeah, I cleaned the holes of their contents. About a third of the time I was involved - whatever...I will now watch how the machine and the coffee behave in the medium term. Then you can see what else has to happen...

Thanks for your help - Greetings Thomas

The components Siemens has used in the Surpresso series are all bought in.

You will find the same technology in some Melitta and Nivona series, it is considered very mature and reliable.

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