Hi there
I have a VBM Domobar Levetta (Piccolo) and have a few issues with getting good extraction. The model has a "tank" and is "non-plumbed" model.
I used to get 10 bar pressure from group, however, it has got prgressively worse and now am not getting 2 bar, and espresso trickles from the head, and doesnt produce crema.
This is a home machine, however, we crank it every day.
I have tried to isolate the common things i can think of
- cleaned shower screen/group head.
- adjusted the grind, and thats not the issue.
- there are no air-locks in the hoses in the water tank and water is being pumped through the group
- dismantled and checked for scale in the lever mechanism.
- removed the machine housing cover to check water pump is pumping water - it is a vibrating or vibra pump and is working.
Things i cannot ascertain is
- Can the pressure be adjusted anywhere?
- Does this issue point to a glaringly simple fault or adjustment?
- Are there other parts i should replace/service?
The water pump has a screw mechanism on the machine side of the pump, which looks like it would control water flow. But how about pressure to the group? Is that done at pump, or somewhere else?
Just wonder how is this adjusted on this machine?
Are there any other parts i should be addressing by cleaning and inspecting?
(I have no aversion to this and am mechanically minded - it looks pretty damn simple in there !)
Any specific advice would be gratefully received, as im now hangin for a tasty brew again!
Kind regards
and thanks in advance
Sam
I have a VBM Domobar Levetta (Piccolo) and have a few issues with getting good extraction. The model has a "tank" and is "non-plumbed" model.
I used to get 10 bar pressure from group, however, it has got prgressively worse and now am not getting 2 bar, and espresso trickles from the head, and doesnt produce crema.
This is a home machine, however, we crank it every day.
I have tried to isolate the common things i can think of
- cleaned shower screen/group head.
- adjusted the grind, and thats not the issue.
- there are no air-locks in the hoses in the water tank and water is being pumped through the group
- dismantled and checked for scale in the lever mechanism.
- removed the machine housing cover to check water pump is pumping water - it is a vibrating or vibra pump and is working.
Things i cannot ascertain is
- Can the pressure be adjusted anywhere?
- Does this issue point to a glaringly simple fault or adjustment?
- Are there other parts i should replace/service?
The water pump has a screw mechanism on the machine side of the pump, which looks like it would control water flow. But how about pressure to the group? Is that done at pump, or somewhere else?
Just wonder how is this adjusted on this machine?
Are there any other parts i should be addressing by cleaning and inspecting?
(I have no aversion to this and am mechanically minded - it looks pretty damn simple in there !)
Any specific advice would be gratefully received, as im now hangin for a tasty brew again!
Kind regards
and thanks in advance
Sam


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