Scroll machine having axially biased scroll

A compressor comprising:

• a shell defining a first passage forming a first discharge passage;
• a compression mechanism supported within said shell and including first and second scroll members meshingly engaged with one another and forming a series of compression pockets, said first scroll member including a second passage forming a second discharge passage extending therethrough;
• and
• an axial biasing system including a biasing member having first and second surfaces generally opposite one another, said first surface including a first radial surface area exposed to an intermediate pressure from one of said compression pockets and a second radial surface area exposed to a discharge pressure, said second surface including a third radial surface area exposed to said intermediate pressure, said biasing member axially displaceable between first and second positions relative to said shell and said first scroll member, said biasing member axially engaging said first scroll member when in said first position.