Vesuvius Pressure Profiling Machine - General Discussion

Adrianmsmith Dave do you know the correct tap size please to clean out the old thread locker on the back side of the valve.

Also what semi permanent thread locker would you use to re-assemble?

I would simply use a very small jewellers type screwdriver to un down the thread, you don’t need a tap and only need to get the loose stuff out.

Loxeal 18:10 is a good semipermanent thread locker, you will only need one or two drops…personally though I would try PTFE tape first as it’s much much cheaper and should work fine.

I took this wand apart completely and assembled it with Loxeal 18:10 https://www.ebay.co.uk/itm/314135700947?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338723872&toolid=20006&customid=ll0fvV4aAAAAiyt0J_JRzj-leU4wAAAAAA

You can also use Loctite 542

DavecUK I have made the two tests, and in both cases the machine tends to fail in a potential failure condition (not always). Also, in one case out of 20 approximately, with the boiler priority, the machine has showed very different pressure behaviour even with the steam boiler off, from cold. I have the video of this but I’m not going to upload because I know that you trust me. This should be an evidence of a capricious mechanical little valve stuck? I don’t know.

To sum up, the machine:

-          WITH THE SAME PID CONFIGURATION THE MACHINE MAKES DIFFERENT EXTRACTIONS.

-          The machine shows an astonishing regular behaviour with the STEAM BOILER OFF. She makes GREAT COFFEE, or very predictable or regular extractions.

-          There is some relationship between the pressure of the STEAM BOILER, because the machine fails an high percentage of times with the STEAM BOILER ON, or with high temperature in any part of the internal machine.

I know that this failure is difficult to solve, but I hope that ACS technicians have the time and the capacity to investigate with the @kautivo Vesuvius machine to try to identify the CAUSE of this capricious failure in order to solve it.  If not, I assume that ACS Vesuvius works like this and I’ll continue to make the coffee with my little annoying morning routine (switching off and on the steam boiler in the morning).

Thanks!

AJuar Sorry to not following the history of entire discussion… anyway my question if this behavior is happening regardless if steam boiler in in ECO-mode or not?

Spid3r00 my friend in Eco mode the steam boiler is with low temperature then there isn’t fail…

what dose it do at different stem boiler temps? 120 -125 -130 etc,

Cuprajake the dosis is the same, 17g or 18g the fail happens when the steam boiler is over 120°…

but under 120 fine?

i personally have all my machines at 125,

have you tried 123 and a two hole tip,

its a very weird fault

Cuprajake but the machine must work right independient of the temperature steam boiler…have you check your machine with 128° ?

Cuprajake ok, good machine!

DavecUK i have to give thanks again your effort to try help us and to resolve the problem in our Vesuvius! I hope before or after we know where is the problem.

Thanks a lot!

DavecUK Thanks! It sounds viable. This morning I have purged the water of the steam wand and the first time 17-18 g of water come out before the steam. Is this normal? Is there another way to check the service boiler level? Where is the autofill valve placed? Could I buy another valve and replace it or it’s an electrical problem? Please, send me the diagram of the Vesuvius or the code of the autofill valve, in order to buy another if it is necessary. Also, the chattering that you mention is an electrical issue, then I’m really not capable of checking electrical issues.

Please let me know. Is it possible to check these things in the factory with the @kautivo coffee machine?

Thank you very much

The autofill valve of my Vesuvius, the one placed in the big brass piece under the group, was replaced when the machine was serviced. All this big part was replaced but the pressure sensor. Despite this the one way valve returned water from the brew boiler to the water tank after replacing it. Fortunately, a few weeks later, it started to work properly, no more water escaping to the tank. Unfortunately, the pressure behaviour we are talking about was never gone.

If the service boiler was overfilled, you wouldn’t have proper steam, just a lot of water if I’m right ¿?

I think we’d have to focus on the first stage of the profile, it’s during the preinfussion where the machine has trouble, this small stop around the 1,5 bars mark. Overshooting is just a consequence of this. As @AlJuar points, the fail is more prone to occur when the machine has been idle, cold, for a long time. It seems to be worst when weather is cold. That’s why I thing it’s a mechanical issue. But yes… it’s very very difficult to solve this far from a machine.

AJuar if the water was due to overfilling you wouldn’t have steam afterwards surely?
Just condensate in the pipelines?

Is there a similar scheme of internal components (like this for my old Rocket) for Vesuvius?

Is it normal behavior that Vesuvius drains water like this during backflushing or brewing shot?

Is this normal during brewing or backflushing?