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I'm inclined to agree with Sprezzatura. It sounds very much like an issue I was having with my Vibiemme Domobar Super. Once the over pressure valve was replaced the machine was back in business. Good Luck and let us know how you go.
Addendum: does the drip tray fill with water quickly when pulling a shot from the OPV waste line? It should only bleed/drip out a small amount of water when the reciprocating pump is on.
Late reply: did you sort out the pressure issue? I was going to suggest experimenting with the OPV. Sometimes they stick and/or partially stick. Try turning the adjustment screw (big slot head) a full turn clockwise and then anticlockwise; then plug the machine back in, turn it on, let it come to pressure and try pulling another shot.
Thanks for the reply,It's hard to tell if it's labouring because it gets up to 8 bar then almost does a small pop and drops down..then up and down again...weird
Does the pump sound like it's labouring? That combined with the pressure readings would indicate something's amiss with it. I'm not sure if these pumps can be pulled apart but if you're comfortable with it you might do that to have a bit of a look/clean and see if it's just a little bit of crap caught in it somewhere.
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