Breville BES 920 solenoid - teflon seal pins

Equipment doesn't work? Troubleshooting? If you're handy, members can help.
DrJerry

#1: Post by DrJerry »

Hoping someone can confirm in which direction I should insert the solenoid pins - I expect one is 'up' and one is 'down' - but which is which?

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BaristaBoy E61

#2: Post by BaristaBoy E61 »

Can you post pictures or diagrams?
"You didn't buy an Espresso Machine - You bought a Chemistry Set!"

DrJerry (original poster)

#3: Post by DrJerry (original poster) »

There are plenty of pics available via DrGoggle - but none clearly show the seals/pins in place.

WWWired

#4: Post by WWWired »

Hi DrJerry :)

BaristaBoy E61 definitely correct that pictures are always great and folks definitely like photos and videos :) For clarity, it appears from your description to be for the 3-way solenoid components, mounted on the top (near the back) of the Group Head assembly, just behind the Brew Boiler. Hopefully the below will assist and be correctly related to your mention. Would be great to see any pictures you might have of your specific assembly too if you're up to it, as that will definitely help folks in the future :)

The "pins" you refer to might be referred to also as "support inserts" or "Tube Supports" (by Parker Hannifin Corp.) for the Teflon seals. A possible basis for the need of these pins (supports/inserts) is often suggested to be for the purposes of keeping Teflon seals or polymer tubing from deforming during compression and subsequent operation. The flared end seats into the solenoid (and likely can't really be inserted any other way) but as you will see in the pictures, some suggest a specific assembly method . . . here's a great discussion from an anonymous poster, including some great pictures, uploaded anonymously to an image hosting site, showing the orientation and insertion of the teflon seals, Tube Supports (pins) and a suggested assembly method . . . click here

. . . and here's a few teaser pics from that post (all photo credit to the unknown poster on that image hosting site), along with quoted text for some of the instructions for a few of the pictures
from anonymous image site poster wrote:The biggest difference I could find between the old and new assembly was with these gaskets. The old ones had two different diameter holes and also didn't have these little metal parts.

from anonymous image site poster wrote:This ↑ is how the new parts go together. NOTE! IMPORTANT! the metal pieces go through the gaskets from the TOP. DO NOT mount them from the bottom. They will not allow for a good seal if you mount them wrong.
from anonymous image site poster wrote:Do yourself a favor and don't try to assemble the solenoid and install it assembled. You will surly have the gaskets fall out as you try to put the thing on the base. Trust me! Do it ↑ this ↑ way. Put the gaskets and metal thingys onto the base first (being mindful to make sure the metal things are going down through the gaskets. THEN put the solenoid carefully down onto the base, making sure the gaskets fit properly into their holes on the solenoid and the solenoid is flush against the base.

With the ↓ screw holes lined up, go ahead and insert the ↓ four mounting screws you took out prior.

Reconnect the three wires MAKE SURE YOU PUT THE WIRES BACK THE CORRECT WAY! Then, reattach your tube to the new solenoid with a zip tie.

DrJerry (original poster)

#5: Post by DrJerry (original poster) »

Hi WWWired,
A big thank you for your most comprehensive answer with the link to the original post and the pictures that provide the definitive answer.
Very much appreciated. Now to re-assemble (correctly) and re-test.

WWWired

#6: Post by WWWired »

haha! thank you DrJerry :)

I've spent many hours reading the incredible posters like BaristaBoy E61 and many other experts on Home-Barista forums for years and their insights, experience and expertise is exceptional and the best on the internet! . . . Home-Barista has always been at the forefront and single best source for all things Coffee Culture :)

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BaristaBoy E61

#7: Post by BaristaBoy E61 »

DrJerry wrote:Hi WWWired,
A big thank you for your most comprehensive answer with the link to the original post and the pictures that provide the definitive answer.
Very much appreciated. Now to re-assemble (correctly) and re-test.
That was an incredible post Anon!
"You didn't buy an Espresso Machine - You bought a Chemistry Set!"