Hydraulic system, mining vehicle and method

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 at least one hydraulic system is provided with at least one closed loop hydraulic circuit comprising:
• at least one first hydraulic pump driven by at least one first motor;
• at least one hydraulic actuator, wherein pressurized hydraulic fluid is directed to circulate in the at least one closed loop hydraulic circuit from an outlet port of the at least one first hydraulic pump to an inlet port of the at least one hydraulic actuator and further from an outlet port of the at least one hydraulic actuator to an inlet port of the at least one first hydraulic pump;
• a flushing system including at least one feed arrangement arranged for feeding a limited amount of additional hydraulic fluid to the at least one closed loop hydraulic circuit from a separate hydraulic fluid source, and a discharge arrangement arranged for discharging a limited amount of used hydraulic fluid from the at least one closed loop hydraulic circuit to the separate hydraulic fluid source, wherein the discharge arrangement includes 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:
• the at least one hydraulic system including an open hydraulic circuit arranged as a common rail hydraulic circuit and configured to provide hydraulic fluid for the flushing system and for at least one hydraulic actuator coupled to the open hydraulic circuit, wherein the open hydraulic circuit is provided with a second hydraulic pump driven by at least one dedicated second motor arranged under control of the at least one control unit.