A mining vehicle, comprising: a movable carrier; at least one mining work device mounted on the carrier; and at least one hydraulic system; wherein the hydraulic system is provided with at least one closed loop hydraulic circuit comprising: at least one first hydraulic pump driven by means of at least one first motor; at least one hydraulic actuator; and wherein pressurized hydraulic fluid is directed to circulate in the closed loop hydraulic circuit from an outlet port of the first hydraulic pump to an inlet port of the hydraulic actuator and further from an outlet port of the hydraulic actuator to an inlet port of the first hydraulic pump; and a flushing system comprising at least one feed arrangement for feeding limited amount of additional hydraulic fluid to the closed loop hydraulic circuit from a separate hydraulic fluid source, and a discharge arrangement for discharging limited amount of used hydraulic fluid from the closed loop hydraulic circuit to the separate hydraulic fluid source; wherein the mentioned discharge arrangement comprises at least one discharge valve which is actively controlled under control of at least one control unit and wherein fluid flow through the discharge valve is selectively controllable; characterized in that the hydraulic system comprises an open hydraulic circuit (Op) serving as a common rail hydraulic circuit and configured to provide hydraulic fluid for the flushing system and for at least one hydraulic actuator (Aa) coupled to the open hydraulic circuit (Op); and the open hydraulic circuit (Op) is provided with a second hydraulic pump driven by means of at least one dedicated second motor under control of the control unit. a movable carrier; at least one mining work device mounted on the carrier; and at least one hydraulic system; wherein the hydraulic system is provided with at least one closed loop hydraulic circuit comprising: at least one first hydraulic pump driven by means of at least one first motor; at least one hydraulic actuator; and wherein pressurized hydraulic fluid is directed to circulate in the closed loop hydraulic circuit from an outlet port of the first hydraulic pump to an inlet port of the hydraulic actuator and further from an outlet port of the hydraulic actuator to an inlet port of the first hydraulic pump; and a flushing system comprising at least one feed arrangement for feeding limited amount of additional hydraulic fluid to the closed loop hydraulic circuit from a separate hydraulic fluid source, and a discharge arrangement for discharging limited amount of used hydraulic fluid from the closed loop hydraulic circuit to the separate hydraulic fluid source; wherein the mentioned discharge arrangement comprises at least one discharge valve which is actively controlled under control of at least one control unit and wherein fluid flow through the discharge valve is selectively controllable; characterized in that the hydraulic system comprises an open hydraulic circuit (Op) serving as a common rail hydraulic circuit and configured to provide hydraulic fluid for the flushing system and for at least one hydraulic actuator (Aa) coupled to the open hydraulic circuit (Op); and the open hydraulic circuit (Op) is provided with a second hydraulic pump driven by means of at least one dedicated second motor under control of the control unit. at least one first hydraulic pump driven by means of at least one first motor; at least one hydraulic actuator; and wherein pressurized hydraulic fluid is directed to circulate in the closed loop hydraulic circuit from an outlet port of the first hydraulic pump to an inlet port of the hydraulic actuator and further from an outlet port of the hydraulic actuator to an inlet port of the first hydraulic pump; and a flushing system comprising at least one feed arrangement for feeding limited amount of additional hydraulic fluid to the closed loop hydraulic circuit from a separate hydraulic fluid source, and a discharge arrangement for discharging limited amount of used hydraulic fluid from the closed loop hydraulic circuit to the separate hydraulic fluid source; wherein the mentioned discharge arrangement comprises at least one discharge valve which is actively controlled under control of at least one control unit and wherein fluid flow through the discharge valve is selectively controllable; characterized in that the hydraulic system comprises an open hydraulic circuit (Op) serving as a common rail hydraulic circuit and configured to provide hydraulic fluid for the flushing system and for at least one hydraulic actuator (Aa) coupled to the open hydraulic circuit (Op); and the open hydraulic circuit (Op) is provided with a second hydraulic pump driven by means of at least one dedicated second motor under control of the control unit.