Abstract: A rotary hydraulic motor which comprises a brake which is adapted to be applied under the pressure of springs and to restrain the output shaft of the hydromotor when the hydromotor is not pressurized and which is arranged to a supply of hydraulic liquid under pressure to the hydraulic motor. In order to ensure that the hydraulic liquid can be withdrawn from the hydraulic cylinder in a simple manner when the motor has stopped so that the brake can subsequently be applied, the piston of the hydraulic cylinder is provided with an orifice plate or a throttle bore through which the hydraulic liquid can enter a chamber of the hydraulic motor.