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  1. #1
    Junior Member
    Join Date
    Oct 2011
    Posts
    2

    Rio 3-Group - Pressure low on one group

    Hello,
    I am having issues with one of the groups on our 2000 Rio SME 3 group machine. All three groups have functioned perfectly until recently, when one head suddenly seemed to have pressure issues. Pump pressure is solid 9 bars, and boilure pressure is good at 1.o-1.5. Group 2 and 3, numbered from left to right, pull perfect shots. However, #1 seems low on pressure, given all variables the same (grind, tamping pressure, etc).

    Any help as to where to start checking things would be appreciated.


    TJ.

  2. #2
    Senior Member
    Join Date
    Dec 2012
    Location
    Michigan, US
    Posts
    1,802
    seal problem to me.

  3. #3
    Junior Member
    Join Date
    Oct 2011
    Posts
    2
    Hi CoffeeJunky,
    A seal where? Metering valve? Solenoid? Expansion valve?

    TJ.

 

 

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