A pump which exhibits an adjustable delivery volume, the pump comprising: (a) a pump housing comprising a delivery chamber which comprises a delivery chamber inlet on a low-pressure side of the pump, and a delivery chamber outlet on a high-pressure side of the pump, for a fluid; (b) a delivery rotor which can be rotated about a rotary axis (R 10) within the delivery chamber, for delivering the fluid; (c) an adjusting device, comprising: an adjusting member which can be adjusted back and forth in the pump housing in a setting direction and a restoring direction in order to adjust the delivery volume of the pump; a first setting chamber (K 1) for generating a first setting pressure for adjusting the adjusting member; and a second setting chamber (K 2) for generating a second setting pressure for adjusting the adjusting member; and a restoring device, arranged in the pump housing, for generating a restoring force which acts on the adjusting member in a restoring direction; (d) a fluidically operable valve for adjusting the setting pressure of the first setting chamber (K 1); (e) and an electromagnetic valve, comprising: a pressure port for a setting fluid which is diverted from the high-pressure side; and a relief port for the setting fluid, (f) wherein the electromagnetic valve comprises a working port for the setting fluid, which is connected to the second setting chamber (K 2), in order to adjust the setting pressure of the second setting chamber (K 2), characterised in that (g) the first setting pressure and the second setting pressure acts or respectively act on the adjusting member in the setting direction, and (h) the fluidically operable valve is permanently connected to the high-pressure side of the pump, hence a control force resulting from the control fluid is permanently acting against the tensing device of the fluidically operable valve. (a) a pump housing comprising a delivery chamber which comprises a delivery chamber inlet on a low-pressure side of the pump, and a delivery chamber outlet on a high-pressure side of the pump, for a fluid; (b) a delivery rotor which can be rotated about a rotary axis (R 10) within the delivery chamber, for delivering the fluid; (c) an adjusting device, comprising: an adjusting member which can be adjusted back and forth in the pump housing in a setting direction and a restoring direction in order to adjust the delivery volume of the pump; a first setting chamber (K 1) for generating a first setting pressure for adjusting the adjusting member; and a second setting chamber (K 2) for generating a second setting pressure for adjusting the adjusting member; and a restoring device, arranged in the pump housing, for generating a restoring force which acts on the adjusting member in a restoring direction; an adjusting member which can be adjusted back and forth in the pump housing in a setting direction and a restoring direction in order to adjust the delivery volume of the pump; a first setting chamber (K 1) for generating a first setting pressure for adjusting the adjusting member; and a second setting chamber (K 2) for generating a second setting pressure for adjusting the adjusting member; and a restoring device, arranged in the pump housing, for generating a restoring force which acts on the adjusting member in a restoring direction; (d) a fluidically operable valve for adjusting the setting pressure of the first setting chamber (K 1); (e) and an electromagnetic valve, comprising: a pressure port for a setting fluid which is diverted from the high-pressure side; and a relief port for the setting fluid, (f) wherein the electromagnetic valve comprises a working port for the setting fluid, which is connected to the second setting chamber (K 2), in order to adjust the setting pressure of the second setting chamber (K 2), characterised in that (g) the first setting pressure and the second setting pressure acts or respectively act on the adjusting member in the setting direction, and (h) the fluidically operable valve is permanently connected to the high-pressure side of the pump, hence a control force resulting from the control fluid is permanently acting against the tensing device of the fluidically operable valve.