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Problem with portafilter staying locked in
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sportflyer
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Posted Mon Oct 7, 2013, 9:43am
Subject: Problem with portafilter staying locked in
 

The original Portafilter that came with the Bezzera07 stays locked in . However the naked Portafilter that I purchased has a tendency to unlock slightly when making espresso  resulting sometimes in leaks.  I measured the locking tabs and indeed the naked portafilter has a slightly thinner tab at the leading edge ( ie the edge that engages first ) of the tab. What can I do besides applying a lot of force when tightening the portafiler ?  Any suggestions?
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frcn
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Posted Mon Oct 7, 2013, 4:51pm
Subject: Re: Problem with portafilter staying locked in
 

How old is the machine? I ask becasue maybe the portafilter gasket has lost its resiliency.

If not, and it is takes a "lot" of force to lock in, and indeed, if it takes more force than the original portafilter and all other factors are equal, then it is likely it is not the correct portafilter for your vintage machine. It could be designed to be used with a thicker portafilter gasket. Might just be a generic E61 portafilter and the Bezerras are a little different in that regard.

 
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DavecUK
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Posted Tue Oct 8, 2013, 10:15am
Subject: Re: Problem with portafilter staying locked in
 

The more salient question is...when did you last change your group gasket (round rubber ring inside group)?
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sportflyer
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Posted Tue Oct 8, 2013, 11:59am
Subject: Re: Problem with portafilter staying locked in
 

I  changed the portafilter gasket last week.  The problem existed before gasket change.  Machine is 2 years old.  

Most probably the naked Portafilter does not quite fit the machine. I don' think its fixable So either I live with the slight leak or buy another naked Portafiler that fits the machine.
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calblacksmith
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Posted Thu Oct 10, 2013, 5:51am
Subject: Re: Problem with portafilter staying locked in
 

If it is just that the handle is not in the same place as a stock PF, that is not a big deal, just tighten until you have a seal and the handle position does not matter.

My E61 can use any of my generic PFs but the final position of the handles change when engaged. Not a big deal

 
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sportflyer
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Posted Mon Oct 14, 2013, 12:55pm
Subject: Re: Problem with portafilter staying locked in
 

calblacksmith Said:

If it is just that the handle is not in the same place as a stock PF, that is not a big deal, just tighten until you have a seal and the handle position does not matter.

My E61 can use any of my generic PFs but the final position of the handles change when engaged. Not a big deal

Posted October 10, 2013 link

There is a difference between the PF locking lugs.  In the original BZ07 PF , the lug thickness starts at 5.2 mm and tapers to 4.3mm . However for the Bottomless PF the lug thickness starts at 5.2mm and tapers to 3.7mm over the same span.  So there is a difference which probably is why there is a slight leak and also contributes to its tendency to slightly unlock during the extraction

Besides  really tightening it very hard there seems to be no way around this.  1st line Equip (where I purchased the BZ07 machine) told me they don't carry a bottomless PF that is suitable for the BZ07.  The only solution is to purchase the original BZ07 PF and cut out the bottom myself. Maybe its not worth the cost .
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