Lubrication system for compressor unit

A compressor including a compressor housing having a discharge chamber which includes an inlet and an outlet, means for controlling the flow of fluid between the inlet and outlet of said discharge chamber a plurality of cylinders in said housing piston means including a shaft for imparting reciprocating motion of said piston means in said cylinders to compress a refrigerant fluid therein, a front housing on said compressor housing including an opening for receiving said shaft, means being provided to effect fluid communication between said shaft seal cavity and the interior of said compressor housing, an oil deflector depending from the inner wall of said compressor housing, said front housing including an oil opening disposed adjacent said oil deflector and a passageway formed therein effecting communication between said oil opening and said shaft seal cavity, whereby oil on the inner wall of said housing is directed by said deflector through said oil opening and into said shaft seal cavity, an oil bypass opening for allowing blow-by gas to be discharged from the interior of said housing, and a protective member circumferentially spaced along said housing inner wall from said oil deflector and projecting from said inner wall beyond said bypass opening, thereby to prevent oil from entering into said bypass opening.