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OPV adjustment on KitchenAid ProLine
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Discussions > Espresso > Machines > OPV adjustment...  
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gjwell
Senior Member


Joined: 14 May 2013
Posts: 2
Location: Bicester
Expertise: I live coffee

Posted Thu Sep 19, 2013, 11:26pm
Subject: Re: OPV adjustment on KitchenAid ProLine
 

In Diveval pic you can see where you insert the allen key, However on the newer machines they have modified the exit hole, there is now a small black plastic pice obscuring access to the OPV. Is is to channel over pressure water back into the water tank. On the older machines the water tickles down and runs along the top and into the base rather than the water tank, causing the whole bottom half of the machine to corrode and the enamel paint to flake off. Sadly this has happened to men and the bottom section is no ruined. I don't know how to remove the plastic pice as I don't have this version of the machine, it looks like it pops out from the bottom. if not you would need to open the machine and remove the OVP. BTW this does make a massive difference to the quality of your shots, providing you have a good grind and are tamping correctly.

To adjust the OPV you need to get a pressure gauge and and adaptor off of ebay (for around 10-15) you can then check the pressure as you adjust it. you un unscrew the double spout from your porta filter (I had to use a vice as its quite tight) and attached the pressure gague. see pic

gjwell: Screen Shot 2013-09-20 at 08.23.20.jpg
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Diveval
Senior Member


Joined: 13 Sep 2013
Posts: 24
Location: Guatemala
Expertise: I love coffee

Espresso: Cimbali D1, Cimbali S1,...
Grinder: cimbali Junior, gaggia MDF,...
Roaster: Old German GMS
Posted Sat Sep 21, 2013, 5:44pm
Subject: Re: OPV adjustment on KitchenAid ProLine
 

D4F Said:

So is that adjusting 33 through part 34 as above, for the next person?

Posted September 14, 2013 link

It seems that my KA does not have piece number 34 (seems like a discharge connector).  In my machine, you take out the water tank and when you look up there is piece 33, you just put the allen key there and change the pressure. Snce I did not have piece 34 on my version I had to improvise sine there was as small leak that was driving me crazy.  I bought a small suction cup, drilled a hole in the middle and installed it where that hole is... Since I wont be adjusting the OPV again. It works and no more leak!

Diveval: image.jpg
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Diveval
Senior Member


Joined: 13 Sep 2013
Posts: 24
Location: Guatemala
Expertise: I love coffee

Espresso: Cimbali D1, Cimbali S1,...
Grinder: cimbali Junior, gaggia MDF,...
Roaster: Old German GMS
Posted Sat Sep 21, 2013, 5:52pm
Subject: Re: OPV adjustment on KitchenAid ProLine
 

gjwell Said:

In Diveval pic you can see where you insert the allen key, However on the newer machines they have modified the exit hole, there is now a small black plastic pice obscuring access to the OPV. Is is to channel over pressure water back into the water tank. On the older machines the water tickles down and runs along the top and into the base rather than the water tank, causing the whole bottom half of the machine to corrode and the enamel paint to flake off. Sadly this has happened to men and the bottom section is no ruined. I don't know how to remove the plastic pice as I don't have this version of the machine, it looks like it pops out from the bottom. if not you would need to open the machine and remove the OVP. BTW this does make a massive difference to the quality of your shots, providing you have a good grind and are tamping correctly.

To adjust the OPV you need to get a pressure gauge and and adaptor off of ebay (for around 10-15) you can then check the pressure as you adjust it. you un unscrew the double spout from your porta filter (I had to use a vice as its quite tight) and attached the pressure gague. see pic

Posted September 19, 2013 link

If you have the newer version, yes you have to open the machine and disassamble the upper part from the lower part, then you can access the OPV, taking off part 34. Be carful with the hot water button, i think I broke mine during the process when I dissasambled everything to clean the boiler! Let me know if you need pictures on how to dissasamble it.
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,026
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Sat Sep 21, 2013, 5:53pm
Subject: Re: OPV adjustment on KitchenAid ProLine
 

Thanks for the reply to clarify.  Nice DIY fix.

 
D4F also at
http://www.gaggiausersgroup.com/
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