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Bezzera 7491001 Lip Seal/Piston Gasket D51x41x8 NBR
$12.99
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SKU: 7491001
Categories: Bezzera Espresso Machines & Espresso Machine Parts, Bezzera Parts, Espresso Parts
Bezzera 7491001 Lip Seal/Piston Gasket D 51 x 41 x 8 NBR
This gasket (7491001) is for the Bezzera Strega espresso machine models.
The parts diagram shows 3 are required.
Reference Part Numbers. This part may be a suitable replacement for the following part numbers:
Ascaso 286112 and AS..31
Astoria CMA 12201
Bezzera 7491001
BFC 0530225
Brasilia 00807.0.00.02
Fiorenzato CS A1200186
Nuova Simonelli 17000021
Pavoni 361017 and 361018
Rossi 0342
Royal 0530225
Vibiemme GUARORTENPIST
Victoria Arduino 17000021
Wega W10388 and WY12201
Bezzera 7491001 Lip Seal/Piston Gasket D 51 x 41 x 8 NBR
| Brand | Bezzera |
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Please ask follow up questions as a new question. Submitted questions will be first reviewed, answered, and lastly publicized.
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What do you sell for cleaning and lubing the group head and gaskets?
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Q What do you sell for cleaning and lubing the group head and gaskets? answer nowAsked by Rob on October 1, 2020 1:09 pmAnswered by the admin
Our favorite is Pretolgel.
I've read that the seals on the Bezzera Strega are actually 7.5mm. Will these 8mm seals work? Read that they need to be sanded down to fit...?
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Q I've read that the seals on the Bezzera Strega are actually 7.5mm. Will these 8mm seals work? Rea...... Read more answer nowAsked by Rob on October 1, 2020 12:57 pmAnswered by the admin
Sorry, we are not the internet police and we will not and can not guarantee every statement made on the internet. We have used these seals on the Strega machines we have sold to customers and we have serviced in our repair department without issue. However, like with all parts, we can not guarantee a fitment because many manufacturers (bezzera and others) make changes within their model ranges over the years and even different models with different importers. Bezzera has been pretty good about updating their diagrams with as accurate information as possible.
If you are unsure, you can check with Bezzera directly, or you can send in your machine for service. Sorry, we do not have a definitive answer for you.
OK, so now I see that the spring assembly does not need to be disassembled in order to replace seals. But would need to be if replacing piston, which I'm hoping does not need to be done. Looking like whole group head needs to be removed from machine to remove small top tube in order to get spring assembly out of group head to replace seals.
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Q OK, so now I see that the spring assembly does not need to be disassembled in order to replace se...... Read more answer nowAsked by Rob on September 30, 2020 3:36 pmA Hello Rob, You don't need to remove the grouphead to replace the seals. You only need to pull the piston assembly up & out of the grouphead. Here's how: Disconnect the two wires that go to the grouphead heating elements. There is a little connector where you will disconnect the wires (you'll need a tiny screwdriver). You'll be feeding the two wires up through the little bent tube that goes to the grouphead, but first: Remove the four allen head screws from the bottom of the lip [at the top] of the grouphead. I believe it is a 3mm allen. Now you can pull the piston with springs assembly up and out of the grouphead. You will have to feed the two wires up through the little bent tube as you pull the piston assembly up and out of the grouphead. It is a bit of a pain feeding the wires but it can be done. Be careful not to strip the coating/covering off the wires. The edges of the tube are sharp and can easily "strip" the wires. Take your time :) Once you have the piston assembly out you can assess the condition of the piston and change the seals. You will probably need to cut the old seals with a utility knife to get them off because they get very hard over time. On my machine the piston looked absolutely horrible, pitted and corroded from minerals. I decided to, as an experiment, soak it overnight in a strong citric acid solution. I was able to clean it up "good enough" using a brass wire brush and even a little careful scraping with a single edge razor. Of course, all this clean-up was done after I had removed the old seals. I can tell you that the new seals did work just fine, even though the piston still looked not-so-great. Remember, the piston doesn't actually touch the walls of the grouphead. It's main function is to hold the seals - that touch the walls - and therefore the piston doesn't need to be perfect. Getting the new seals onto the piston will seem impossible but it can be done! Use a tiny bit of Dow Corning 111 (food grade) silicon and you'll be able to get the new seals on. To reassemble feed the two wires back through the little bent tube as you feed the piston assembly down into the grouphead, then re connect the wires and put the four screw in (careful not to over tighten). That's about it. Hope this helps. By the way if you haven't already be sure to study the exploded diagrams for the Strega. Good luck! Kip ps I wish I could attach photos. If you like, it's okay to contact me directly via email: [email protected]
Thanks for input to previous question. Before I begin taking group head apart and ordering parts... it appears the springs are under compression. Is this something that is difficult, maybe even dangerous, to dissemble / assemble? If so, is it worth bringing to 1st Line for repair? Also, seems the group head needs to be removed from machine in order to remove top tube containing wires that run between machine and group head...?
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Q Thanks for input to previous question. Before I begin taking group head apart and ordering parts....... Read more answer nowAsked by Rob on September 30, 2020 3:27 pmAnswered by the admin Sorry, this level of support is beyond the level of our free services. Others may have or will answer, but all repairs are at your own risk for damage and/or personal injury. Again, sorry, we are unable to offer free services on a more complex repair. We are able to handle the repair inhouse if interested.
Just replaced bad pump on my Bezzera Strega (2011), fixed. Now water coming out of bottom of group head during startup and gushing out top of group head when lever pulled (doesn’t stop until machine turned off). Assume seals were going but with old weaker pump it didn’t leak. Now with new pump pressure it leaks and appears time for new seals (machine is 10 years old with about 1000 shots pulled). Based on Strega diagram, below are the parts required followed by what I assume would be 1st Line replacements, some missing. Are these correct?
6 5224201 PISTON
1st line part - don't see it on your web site (this doesn't appear to be a seal, so maybe no need to replace)
7 7491001 LIP SEAL D51 X 41 X 8 NBR
1st Line part - Bezzera 7491001 Lip Seal/Piston Gasket D51x41x8 NBR
15 7493020 UNDERCUP GASKET
1st line part - don't see it on your web site
16 5470512 SHOWER D58X19
1st line part - Bezzera 5470512 Shower / Dispersion Screen (my seems to be fine, so not sure I really need this unless it's normally done at this time)
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Q Just replaced bad pump on my Bezzera Strega (2011), fixed. Now water coming out of bottom of grou...... Read more answer nowAsked by Rob on September 28, 2020 12:07 pmA Howdy, I think you only need the three lip seal/piston gaskets. I was able to clean up a very crusty piston by soaking it in a citric acid solution overnight, then carefully scraping away the remaining 'barnices'. Put the new seals on with a thin coat of food grade silicon grease. I also carefully wet sanded the inside of the cylinder with 600 grit, just don't get carried away. The end result after sanding didn't look great, there were still 'channels' from hard water (even though I've only ever used filtered water) but with the new seals everything worked okay. Be aware that the shower dispersion screen is easily damaged getting it out, so maybe not a bad idea to buy a backup. Hope this helps :)
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