sportflyer Senior Member Joined: 17 Jan 2011 Posts: 13 Location: Vancouver, WA Expertise: I love coffee
Posted Mon Oct 7, 2013, 8:43am 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?
Posted Mon Oct 7, 2013, 3:51pm 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.
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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