Patent ID: 7730826

Claim:
An axial piston hydraulic device comprising: a housing having a cylinder block therein with reciprocating pistons that are acted upon by a swashplate; a first servo piston connected to the swashplate adjacent a first end; an end cap having a cavity disposed therein secured to the housing; and a moveable servo member disposed within the cavity of the end cap and receiving the servo piston to provide at least three operating conditions; wherein a servo fill port is disposed within the servo member to provide pressure within a cavity of the servo member; and wherein the end cap has a first port to pressurize the cavity of the end cap and a second port in communication with the servo fill port to pressurize the cavity of the servo member; wherein a biasing member biases the servo member and servo piston to a first position; wherein pressurization of the first port to a first threshold pressure moves the servo member and servo piston a first distance from the first position; wherein pressurization of the second port to a second threshold pressure moves the servo piston a second distance from the first position; and wherein the first distance is less than the second distance.