the disclosed apparatus relates to a liquid cooled brake apparatus comprising : a housing , a brake cooling pump mounted to said housing , a braking force actuator mounted to said housing , said actuator being driven by a first driven member ; and a braking force applicator in operable communication with said braking force actuator and a brake rotor , the rotor rotationally fixed to said first or a second driven member . the disclosed method relates to a method of retarding a driven member comprising : driving a braking force actuator with a first driven member , actuating a braking force applicator ; and retarding the rotation of a rotor rotationally fixed to said first or a second driven member .