Hydraulic control unit having fill port

A hydraulic control unit that delivers hydraulic fluid to a limited slip differential, the hydraulic control unit comprising:

• a hydraulic control unit housing having an accumulator housing portion and a housing manifold portion that collectively house a biasing assembly and a piston, the housing manifold portion forming an accumulator chamber with the piston;
• a vent hole defined in the hydraulic control unit housing;
• a first passageway defined by the hydraulic control unit housing that is generally coaxial with the vent hole;
• and
• a second passageway defined in the hydraulic control unit housing that intersects the first passageway and that is oriented at a different angle than the first passageway;
• wherein the vent hole is dual purpose permitting hydraulic fluid entry into the accumulator chamber through the second passageway while air is permitted to escape the hydraulic control unit housing through the vent hole.

A hydraulic control unit that delivers hydraulic fluid to a limited slip differential, the hydraulic control unit comprising:

• a hydraulic control unit housing having an accumulator housing portion and a housing manifold portion that collectively house a biasing assembly and a piston, the housing manifold portion forming an accumulator chamber with the piston;
• a vent hole defined in the hydraulic control unit housing;
• a first passageway defined by the hydraulic control unit housing that is generally coaxial with the vent hole;
• a second passageway defined in the hydraulic control unit housing and that intersects the first passageway;
• and
• a bypass fill port defined in the hydraulic control unit housing that is accessible through the vent hole;
• wherein the vent hole is dual purpose permitting hydraulic fluid entry into the accumulator chamber through the second passageway while air is permitted to escape the hydraulic control unit housing through the vent hole.