A system and method of this disclosure control an on/off state of a power take-off by monitoring the power demand of a fluid power circuit that includes the power take-off and a piece of equipment connected to the power take-off. The power demand may be indicated by a pressure or temperature of a fluid power circuit, by a motion of the equipment or its hand-held controller, or by an engine torque of an engine driving the power take-off. When the equipment transitions between an off state and an on state, the controller automatically engages the power take-off. When the equipment is in the on-state for a predetermined amount of time and the power demand is at or below a predetermined threshold during the predetermined amount of timethereby indicating idle time or an inactive state of the equipmentthe controller automatically disengages the power take-off.

A self-propelled work machine includes an undercarriage provided with drive wheels driven by a drive device. An upper structure is rotatably mounted on the undercarriage. A drive unit is arranged in the undercarriage and a boom for a work tool is mounted on the undercarriage. The drive unit drives a power generator that is a power source for an electric motor arranged in the upper structure, the electric motor being the drive device for the drive wheels arranged on the undercarriage.

Provided is a working vehicle capable of efficiently cooling an engine, a torque converter oil and a hydraulic oil. There are provided an engine 11, a torque converter 12, a hydraulic working device 15 to be operated by a hydraulic oil 31, a radiator 16 for radiating heat of engine cooling water 32 for cooling the engine 11, an oil cooler 17 for radiating heat of the hydraulic oil 31, and a heat exchanger 19 for performing a heat exchange between a torque converter oil 33 to be used for the torque converter 12 and the hydraulic oil 31. The torque converter oil 33 is heat exchanged with the hydraulic oil 31. Therefore, heat of the torque converter oil 33 is radiated by the oil cooler 17 through the hydraulic oil 31. Also in a running operation, the heat can be radiated by both of the radiator 16 and the oil cooler 17, and the engine 11, the torque converter oil 33 and the hydraulic oil 31 can be cooled efficiently.

The wheel side of a drive axle with wheel member steering having a drop center rim, preferably made of steel, is provided on the wheel hub and is combined with a disc brake, which is axially inwardly offset relative to the wheel plane and which preferably has compressed an actuation. The necessary space for the disc brake arrangement is guaranteed by the sufficiently low diameter of the wheel hub in the region of the brake disc and by a comparatively large axial space for the brake system, which is created by an axially narrow design of the wheel hub transmission and a by a new design of the steering knuckle bearing and of the pertaining axle guard.

The invention relates to a construction- and/or material-handling machine such as a crane, excavator or tracked vehicle, comprising an internal combustion engine that drives one or more energy-consuming devices such as a pump, winch, actuator for a structure or working-unit drives of the construction- and/or material-handling machine via a mechanical drive train. According to the invention, an electric drive for driving the mechanical drive train is provided and can be engaged by means of a clutch and decoupled from the mechanical drive train.

A system and method of this disclosure control an on/off state of a power take-off by monitoring the power demand of a fluid power circuit that includes the power take-off and a piece of equipment connected to the power take-off. The power demand may be indicated by a pressure or temperature of a fluid power circuit, by a motion of the equipment or its hand-held controller, or by an engine torque of an engine driving the power take-off. When the equipment transitions between an off state and an on state, the controller automatically engages the power take-off. When the equipment is in the on-state for a predetermined amount of time and the power demand is at or below a predetermined threshold during the predetermined amount of timethereby indicating idle time or an inactive state of the equipmentthe controller automatically disengages the power take-off.

The invention relates to an electrically drivable steering axle (10) having an axle housing (11), an electric motor (12), a transmission (13), a differential (14) with a first output shaft (18) and a second output shaft (18), a first wheel head (15), a second wheel head (16) and a steering linkage (17, 17, 17). The electric motor (12) is drive-connected to the first wheel head (15) and to the second wheel head (16) via the transmission (13) and the differential (14). The steering axle (10) according to the invention is distinguished by the fact that the electric motor (12), the transmission (13), and the differential (14) are arranged coaxially with the first output shaft (18) and the second output shaft (18). The invention additionally relates to a corresponding vehicle.