Jump to content

Recommended Posts

Well this is a bit odd....

 

Just started happening this has. When I rebuilt the Personal 1, I replaced the original and very knackered NS group seal (OEM on this machine was 7mm, at least that's what came off it anyway) with a new, admittedly thicker at 8.3mm blue silicone one about 6 months ago. I didn't bother putting the paper shim behind the new seal due to the extra thickness taking up the slack, worked fine, PF locks in spot on etc etc.

 

Now as of last week it fairly regularly blows out of the group head at random, crapping water everywhere. I've pulled the seal, looks fine. Clean, still flexible, no damage. Reseating it solved the problem for 10 or so shots then BAM it's out again.

 

The only other thing that has changed recently is I replaced the pump, but the pressures etc are all as previous. No change there.

 

Your comments, thoughts and wisdom, as ever, welcome. Also sarcasm.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites
Well this is a bit odd....

 

Just started happening this has. When I rebuilt the Personal 1, I replaced the original and very knackered NS group seal (OEM on this machine was 7mm, at least that's what came off it anyway) with a new, admittedly thicker at 8.3mm blue silicone one about 6 months ago. I didn't bother putting the paper shim behind the new seal due to the extra thickness taking up the slack, worked fine, PF locks in spot on etc etc.

 

Now as of last week it fairly regularly blows out of the group head at random, crapping water everywhere. I've pulled the seal, looks fine. Clean, still flexible, no damage. Reseating it solved the problem for 10 or so shots then BAM it's out again.

 

The only other thing that has changed recently is I replaced the pump, but the pressures etc are all as previous. No change there.

 

Your comments, thoughts and wisdom, as ever, welcome. Also sarcasm.

 

Dodgy portafilter?


Home - Nuova Simonelli MAC2000 V, La Pavoni, Compak e8, Niche Zero, IMS & VST baskets, IMS shower screen, skateboard torr, MildredM bar towels

 

@SkateReclaimCreate

 

 

Share this post


Link to post
Share on other sites
Dodgy portafilter?

 

HAHAHAHAHAAAAA

 

Nah mate, this happens with the PF you made AND the OEM NS one.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites

I assume the pf is unwinding from the group, not that the seal is coming out?

 

You using an aftermarket silicone seal?


ACS Vesuvius DBPP, Izzo Duetto DB, Minima DB, Lelit Bianca Prototype DB (paddle flow control) BTC Machines: Roasters: Amazon Dalian 1kg Drum Roaster, other failed roasters: Grinders: Ceado E92, Niche US and UK: 145kg assorted greens: My reviews at https://coffeeequipmentreviews.wordpress.com/

Share this post


Link to post
Share on other sites
I assume the pf is unwinding from the group, not that the seal is coming out?

 

You using an aftermarket silicone seal?

 

No mate, with the PF locked in, the seal is blowing out of the group head. It’s pretty impressive.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites
Group seal inserted the wrong way up ?

 

Could be....it’s got ridges one side and a smooth other side. I installed ridges up. So smooth meeting the PF.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites
That's the correct seal install.

Is the silicone seal a loose fit, or a tight fit ? ( It should be a tight push-fit)

 

Tight push fit it is.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites

Blocked shower screen?


Expobar DB Office Leva IV, La Pavoni Professional -- FOR SALE: MBK HEFT, Torr Goldfinger Titan Convex & 58.55 Flat -- Ceado E8, Lido E, Pharos VDD -- 2 and 5 cup Syphons; Vintage Nicro Metal Filter -- Gene Cafe CBR101 with Dimmer Mod and Bean Mass Probe

Share this post


Link to post
Share on other sites

By way of update, I've just gone ahead and replaced the seal. So far, so good.


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites

NS seals are pretty confusing, even for their distributors. They have flat and conical in 2 different thicknesses. Either shape works but from my dealings it seems that it is up to preference of the local distributor or the end user or whether they favour flat or conicals.

 

On the conicals the flat side faces up, the angled side faces down. A little lubricant on a seal does help the initial insertion. A sheen of lubricant is all you need, not big globs of the stuff. On the seals I make the 8.3mm are red and the 9mm are blue.

Share this post


Link to post
Share on other sites
NS seals are pretty confusing, even for their distributors. They have flat and conical in 2 different thicknesses. Either shape works but from my dealings it seems that it is up to preference of the local distributor or the end user or whether they favour flat or conicals.

 

On the conicals the flat side faces up, the angled side faces down. A little lubricant on a seal does help the initial insertion. A sheen of lubricant is all you need, not big globs of the stuff. On the seals I make the 8.3mm are red and the 9mm are blue.

 

Thanks Paul. Yes, agreed that OEM NS seals aren't straightforward. I replaced the original with an 8.3mm Cafelat blue silicone seal, which has now been replaced with an 8.0mm Cafelat red silicone seal.

 

You make seals, you say?


Nuova Simonelli Personal 1 ¦ Mazzer SJ

Share this post


Link to post
Share on other sites

I've had this exact same problem with my Gaggia Classic recently. Basically nothing changed but it seemed to start happening and new seals (either silicon or OEM) didn't solve it.


Rocket Appartamento | Mahlkonig Vario | 58mm Rocket tamper | AeroPress | VST 18g basket | HappyDonkey Bottomless PortaFilter

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • About:

    Coffee Forums UK is the UK's premier coffee forum Started in June 2008 by Glenn Watson, we now have more than 22000 mainly UK based members, and welcome more than 3000 members and visitors from around the world each day! With strategic investment and digital expertise from the Jackson Lockhart team (Tait Pollack and Adam Bateman), we are taking Coffee Forums UK to the next level, and are delighted to share the journey with you.

    New Members:

    We are often referred to as the friendliest forum on the web and we look forward to welcoming you onboard.

    Terms of Use

    Advertising

    Coffee Forums Media Kit

    Buy Advertising Space

    Donate

    Get Your Supporter Badge (per year)

×
×
  • Create New...