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Espresso: Lever Espresso Machines
MCAL Pressure problem
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johnboddie
Senior Member


Joined: 28 Nov 2008
Posts: 207
Location: Virginia
Expertise: I love coffee

Espresso: MCAL, Brasilia Mini Classic,...
Grinder: Rossi RR45a,Rocky,...
Drip: Cuisinart (non-grinding)
Roaster: Behmor 1600
Posted Thu Sep 26, 2013, 8:19am
Subject: MCAL Pressure problem
 

Over the past two months, my MCAL appears to be increasingly having problems coming up to and holding its operating pressure. The pressure gauge, which had been consistently reading between .8 and 1.2 bar, now ranges from .6 to .8 bar. When cold, the gauge registers about .2 bar.

Iím not sure whether this is a problem with the gauge or the pressurestat. I believe that I would need to adjust the bolt on the pressurestat to move the plunger back from the switch in order to increase the pressure at which it trips. Is that correct?

Does anyone have any thoughts on how I might determine the source of this problem?

Thanks in advance for your responses.
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stefano65
Senior Member
stefano65
Joined: 30 Oct 2004
Posts: 1,409
Location: Eugene OR
Expertise: Professional

Espresso: Vibiemme,Elektra,
Grinder: Vario,Macap,
Vac Pot: not
Drip: not
Roaster: not
Posted Thu Sep 26, 2013, 1:18pm
Subject: Re: MCAL Pressure problem
 

It's is kind of "normal" or to be expected for these gauge to eventually stop going back to zero,

and generically speaking when that happens, they are still reading correctly when they are going UP, (needle can be reposition as well)
I say generically NOT all the time,

saying so, if you pressure coming out form you steam valve still feel nice and strong, then you might have a problem just with the gauge,
if not you can try adjusting the pstat
or before doing so
look inside the boiler for scale build up,
if so descale, clean the PRESSURESTAT PIPE
then see if the pstat behave or needs to be replaced

 
Stefano Cremonesi
info@espressocare.com
www.espressocare.com
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johnboddie
Senior Member


Joined: 28 Nov 2008
Posts: 207
Location: Virginia
Expertise: I love coffee

Espresso: MCAL, Brasilia Mini Classic,...
Grinder: Rossi RR45a,Rocky,...
Drip: Cuisinart (non-grinding)
Roaster: Behmor 1600
Posted Thu Sep 26, 2013, 2:47pm
Subject: Re: MCAL Pressure problem
 

Thank you very much, Stefano. I am still getting sufficient steam pressure to make a latte for my wife with no difficulty, so I will assume that this is a meter problem for the time being.

John Boddie
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