A hydraulic actuator control device for a dump truck including a variable capacity-type hydraulic pump configured to be driven and rotated by an engine and having a capacity adjusted by a regulator, a hydraulic motor, configured to receive hydraulic oil from the hydraulic pump, which is configured to be driven on the basis of a first pressure target value to drive and rotate a cooling fan for cooling a heat exchanger, a hoist cylinder, configured to receive the hydraulic oil from the hydraulic pump, which is configured to be driven on the basis of a second pressure target value to raise and lower a loading platform for carrying loads, a selection valve configured to selectively supply the hydraulic oil from the hydraulic pump to the hydraulic motor or the hoist cylinder, and an arithmetic operation control unit configured to control drive of the regulator of the hydraulic pump and the selection valve to achieve the first or second pressure target value, the hydraulic actuator control device for a dump truck comprising: a pump discharge pressure sensor configured to detect a pressure of the hydraulic oil discharged from the hydraulic pump as a pump discharge pressure; an actuator supply pressure sensor configured to detect a pressure of the hydraulic oil supplied to the hydraulic motor via the selection valve as an actuator supply pressure; and an abnormality determination unit configured to determine presence/absence of abnormality in the hydraulic motor or the hoist cylinder on the basis of the pump discharge pressure and the actuator supply pressure and on the basis of an information as to whether or not the hoist cylinder is operating or the cooling fan is operating, wherein the arithmetic operation control unit is configured to drive the regulator and to perform control to minimize the capacity of the hydraulic pump in a case in which the abnormality determination unit determines that abnormality has occurred in the hydraulic motor or the hoist cylinder. a variable capacity-type hydraulic pump configured to be driven and rotated by an engine and having a capacity adjusted by a regulator, a hydraulic motor, configured to receive hydraulic oil from the hydraulic pump, which is configured to be driven on the basis of a first pressure target value to drive and rotate a cooling fan for cooling a heat exchanger, a hoist cylinder, configured to receive the hydraulic oil from the hydraulic pump, which is configured to be driven on the basis of a second pressure target value to raise and lower a loading platform for carrying loads, a selection valve configured to selectively supply the hydraulic oil from the hydraulic pump to the hydraulic motor or the hoist cylinder, and an arithmetic operation control unit configured to control drive of the regulator of the hydraulic pump and the selection valve to achieve the first or second pressure target value, the hydraulic actuator control device for a dump truck comprising: a pump discharge pressure sensor configured to detect a pressure of the hydraulic oil discharged from the hydraulic pump as a pump discharge pressure; an actuator supply pressure sensor configured to detect a pressure of the hydraulic oil supplied to the hydraulic motor via the selection valve as an actuator supply pressure; and an abnormality determination unit configured to determine presence/absence of abnormality in the hydraulic motor or the hoist cylinder on the basis of the pump discharge pressure and the actuator supply pressure and on the basis of an information as to whether or not the hoist cylinder is operating or the cooling fan is operating, wherein the arithmetic operation control unit is configured to drive the regulator and to perform control to minimize the capacity of the hydraulic pump in a case in which the abnormality determination unit determines that abnormality has occurred in the hydraulic motor or the hoist cylinder. a pump discharge pressure sensor configured to detect a pressure of the hydraulic oil discharged from the hydraulic pump as a pump discharge pressure; an actuator supply pressure sensor configured to detect a pressure of the hydraulic oil supplied to the hydraulic motor via the selection valve as an actuator supply pressure; and an abnormality determination unit configured to determine presence/absence of abnormality in the hydraulic motor or the hoist cylinder on the basis of the pump discharge pressure and the actuator supply pressure and on the basis of an information as to whether or not the hoist cylinder is operating or the cooling fan is operating, wherein the arithmetic operation control unit is configured to drive the regulator and to perform control to minimize the capacity of the hydraulic pump in a case in which the abnormality determination unit determines that abnormality has occurred in the hydraulic motor or the hoist cylinder.