Vacuum relief valve on my machine started leaking after a while, has a faint hissing sound from the top of the machine. Dead easy to sort out,
>From the WholeLottaLove web site (easier than typing it out myself :-) ) JohnB http://www.wholelattelove.com/tips.cfm?TipID=13937&itemID=685 Question My machine is making a constant hissing noise [image: questions and answers]Answer There are several possible causes of this problem. Please follow the instructions below to solve it. *Solution 1* The most common solution to this problem is to clean out the Vacuum Relief Valve (VRV). It is a small valve on top of the boiler that prevents vapor lock. As the machine heats up, it builds pressure. The pressure forces up a small plunger, sealing the VRV and the boiler will be able to begin building pressure. Follow these steps to clean it out: *Tools required:* - Phillips head screwdriver - 3mm Allen wrench - 17 mm socket and ratchet - WD-40 1. Always unplug the machine. Be sure the machine is completely cooled. 2. Remove the cup warming plate and water reservoir. 3. There are 5 screws holding the housing of the machine on. The back and sides of the machine is a single "U" shaped metal panel. There are 4 screws at the front of the machine- 2 on the left side and two on the right side. There is also 1 at the back of the machine at the base. Remove all 5 screws and slide the panel off. 4. You will now see the piece that holds the water reservoir in place. It is held on to the machine by 2 Allen screws. Unscrew these and remove the piece to reveal the top of the boiler. *CAUTION: When you remove this piece, be careful not to pull out the 2 wires connected to the bottom of it. They control the reservoir pressure switch.*If they are disconnected, you can reattach the leads to the very bottom and top plugs, but they must be connected properly. If they are reversed, the machine will not pump. If you do reverse the connections, the leads will need to be switched back in order for the machine to pump again. 5. Once the top panel has been removed, you will have access to the top of the boiler. The boiler is the large, copper barrel-shaped assembly toward the rear right of the machine (if you are facing the front of the machine). The Vacuum Relief Valve (VRV) is located on top of the boiler at about the 12 o'clock position. It is a 17mm brass bolt with a small, loose brass plunger on top in the center. It is this plunger that seals the boiler as it gains pressure. 6. Using the 17mm socket, unscrew the VRV from the top of the boiler. Once the VRV has been removed, you will see that the assembly is actually made up of 3 different parts- the top cover nut, the plunger and the bottom nut. 7. Unscrew the top and bottom halves of the VRV. Once separated, you'll find a small brass plunger with a very small red gasket at the base. 8. These parts all need to be cleaned thoroughly and given a small shot of WD-40. 9. Once the parts have been cleaned and lubricated, re-assemble the VRV and firmly replace it on the boiler. Make sure it is snug but not overtightened, as you may need to remove it for a future cleaning. 10. Re-assemble the machine. *Solution 2* If the first solution does not work, please call us to order a new VRV. The o-ring may be worn out and need to be replaced. On Sat, Nov 22, 2008 at 1:03 AM, Todd Salzman <[EMAIL PROTECTED]>wrote: > Hi Justin, > > I am guessing that the vacuum relief valve is probably leaking. That would > cause the water level in the boiler to go down and therefore the pump will > cycle on to fill the boiler back up. > > It is pretty easy to clean it. > > If you can e mail me you phone number I will call you and help walk you > through the check out. > My e mail is [EMAIL PROTECTED] > > Thanks > > Todd Salzman > Whole Latte Love > > > All: > > My Expobar Office Lever is about 2 mos old and has developed a hissing > noise within the boiler area. I've noticed the pump now runs more > often while the machine is on. > > Called the vendor, Aabree, who said the overpressure valve may be to > be replaced. Should I try adjusting the valve first? And if I do > need to replace the valve, could I do this or should I sent it back > for repair? > > Now they're saying maybe a cleaning would do the trick. > > Any info/advice would be appreciated. > > Thanks, > > Justin > > > > > > > > > ---------- Forwarded message ---------- > From: Justin <[EMAIL PROTECTED]> > To: Brewtus <[email protected]> > Date: Fri, 21 Nov 2008 11:20:49 -0800 (PST) > Subject: Hissing sound in Office lever > > All: > > My Expobar Office Lever is about 2 mos old and has developed a hissing > noise within the boiler area. I've noticed the pump now runs more > often while the machine is on. > > Called the vendor, Aabree, who said the overpressure valve may be to > be replaced. Should I try adjusting the valve first? And if I do > need to replace the valve, could I do this or should I sent it back > for repair? > > Now they're saying maybe a cleaning would do the trick. > > Any info/advice would be appreciated. > > Thanks, > > Justin > > --~--~---------~--~----~------------~-------~--~----~ > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [EMAIL PROTECTED]<[EMAIL PROTECTED]> > For more options, visit this group at > http://groups.google.com/group/brewtus?hl=en > -~----------~----~----~----~------~----~------~--~--- > > > ZWFuaW5n(c) > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Brewtus" group. 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