A forestry winch with - an unwinding sheave - a winch drum with a drum brake - a rope, and - a hydraulic system, the hydraulic system comprising - an oil reservoir, - a filter, - a pump, - a first valve, - a first check valve, - an unloading valve, - a second check valve, - a control valve, - a hydraulic accumulator, - a hydromotor, - a brake cylinder, - a clutch cylinder, - a flow regulator, - a third check valve, - a fourth check valve, wherein - the oil reservoir is connected with the pump, the control valve and the hydromotor, - the filter is located between the oil reservoir and the pump, - the first check valve is located in a first line connecting the pump with the hydraulic accumulator, - the input of the unloading valve is connected to a second line diverging from the first line between the pump and the first check valve, the output of the unloading valve being connected to the hydromotor and to the control valve through a third line, - the second check valve is located in the first line upstream of the hydraulic accumulator with a first throttle that is linked in parallel with the second check valve, - the first valve is connected to a fourth line diverging from the first line between the first check valve and the second check valve, the first valve being further connected to the brake cylinder and the clutch cylinder, - the third check valve with a parallely linked second throttle is connected upstream of the hydromotor in the third line, - the fourth check valve with a parallely linked adjustable throttle is connected between the brake cylinder and the first valve, - the flow regulator is connected upstream of the third check valve in the third line and connected to the output of the unloading valve and to the control valve, - the control valve is further connected to a fifth line diverging from the first line between the pump and the first check valve, and wherein the pump fills the accumulator through the first and second check valves (4 and 7) to a working pressure, which is set on the unloading valve; when the oil in the hydraulic accumulator reaches the set working pressure, the unloading valve opens and remains in this position until the pressure in the hydraulic accumulator drops under a specified value, which is preferably 10 to 15 bar; the oil from the pump then freely runs to the flow regulator and the control valve, when the unloading valve is open; the control valve being in a passive position, the smaller resistance is on the side of the control valve and the oil runs through the control valve into the oil reservoir; wherein when a rope winding function is selected by a user, the left part of the first valve is activated, the control valve being in a passive position, the first valve is switched and the oil runs from the hydraulic accumulator through the first throttle and the first valve and activates the clutch cylinder; when the user selects the function of rope unwinding, the right part of the control valve and the right part of the first valve are simultaneously switched; the oil runs from the pump through the control valve to the flow regulator, the third check valve to the hydromotor, which drives the unwinding sheave, via which the rope from the winch drum is lead; at the same time the oil from the hydraulic accumulator through the first throttle, the first valve and the adjustable throttle activates the brake cylinder and consequently releases the drum brake, so that the drum starts to unwind due to the pulling force in the rope, caused by the hydromotor. - an unwinding sheave - a winch drum with a drum brake - a rope, and - a hydraulic system, the hydraulic system comprising - an oil reservoir, - a filter, - a pump, - a first valve, - a first check valve, - an unloading valve, - a second check valve, - a control valve, - a hydraulic accumulator, - a hydromotor, - a brake cylinder, - a clutch cylinder, - a flow regulator, - a third check valve, - a fourth check valve, - an oil reservoir, - a filter, - a pump, - a first valve, - a first check valve, - an unloading valve, - a second check valve, - a control valve, - a hydraulic accumulator, - a hydromotor, - a brake cylinder, - a clutch cylinder, - a flow regulator, - a third check valve, - a fourth check valve, - the oil reservoir is connected with the pump, the control valve and the hydromotor, - the filter is located between the oil reservoir and the pump, - the first check valve is located in a first line connecting the pump with the hydraulic accumulator, - the input of the unloading valve is connected to a second line diverging from the first line between the pump and the first check valve, the output of the unloading valve being connected to the hydromotor and to the control valve through a third line, - the second check valve is located in the first line upstream of the hydraulic accumulator with a first throttle that is linked in parallel with the second check valve, - the first valve is connected to a fourth line diverging from the first line between the first check valve and the second check valve, the first valve being further connected to the brake cylinder and the clutch cylinder, - the third check valve with a parallely linked second throttle is connected upstream of the hydromotor in the third line, - the fourth check valve with a parallely linked adjustable throttle is connected between the brake cylinder and the first valve, - the flow regulator is connected upstream of the third check valve in the third line and connected to the output of the unloading valve and to the control valve, - the control valve is further connected to a fifth line diverging from the first line between the pump and the first check valve,