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HX Machine Losing Pressure at the Group Head?
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goodlookin1
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Joined: 12 Apr 2010
Posts: 14
Location: Sacramento, CA
Expertise: I live coffee

Espresso: Expobar Office
Grinder: Vanelis Minipro III
Posted Sun Aug 18, 2013, 11:26am
Subject: HX Machine Losing Pressure at the Group Head?
 

Hey Guys,

My Expobar Pulsar seems to be losing BAR pressure more and more as the days go by. It's not getting the thick espresso that I normally do and it's coming out slower and slower. Amazingly, the shots are not tasting all that bad, but I want to get my machine in tip top shape.

Could this perceived loss of pressure be coming from the vibe pump going bad? Just this morning when I turned it on, I heard the typical noise that is pumping water into the boiler, but it had a half second lull in the middle of the boiler being pressurized where it sounded almost as if there wasnt enough power getting to the machine. I know the power was fine, but it was like the pump slowed down for a half second and got quieter. It ramped up again shortly after that, and this is the first time I've heard that lull. But this, in conjuncture with the perceived weaker pressure......what do you think could be going on?

I haven't had to replace the pump and I've had this machine for 5 years, and the people I bought it from before me had it for a year and a half. Is it time to replace?

Thanks,
Ryan
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 2,973
Location: PNW
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Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sun Aug 18, 2013, 11:30am
Subject: Re: HX Machine Losing Pressure at the Group Head?
 

It could be the vibe pump.  5 years is not an unreasonable amount of time for them to die.   For 50$ or so it is good to have a spare on hand even if it turns out not to be the issue.  Have you descaled it?

 
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frcn
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frcn
Joined: 23 Dec 2001
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Posted Sun Aug 18, 2013, 11:38am
Subject: Re: HX Machine Losing Pressure at the Group Head?
 

Before replacing teh pump:
Check for a clogged or obscured intake filter (if so equipped).
Check of kinked hoses.
Check the voltage at the outlet.
Check for a leaky pressure relief valve.
Check for a leaky 3-way valve.

 
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