The invention relates to a method of controlling a working machine. The method includes monitoring a detection region behind the working machine by means of a rear detection device; and determining whether the working machine is traveling forward or in reverse. The method further includes disregarding an object in the detection region detected by the rear detection device when the working machine is traveling forward. The invention also relates to a control system for controlling a working machine having a rear detection device arranged to monitor a detection region behind the working machine. The invention also relates to a working machine.

A vehicle includes a chassis, and a stabilizer including a support frame that has a wheel support that is configured to support at least one shaft and two wheels arranged on opposite sides relative to a longitudinal axis of said vehicle and defining a track width between said two wheels. A base supports the support frame, and a suspension connects the base relative to the chassis and is configured to allow a free vertical displacement of one of the base and the chassis relative to the other over a restricted range. A stabilizer of or for such a vehicle.

A motor drive assembly for selective rail or track operation of an excavators or other mobile platform via a source of hydraulic pressure. The motor drive assembly may include one or more drive arm assemblies mounted at ends of the mobile platform underbody, with the drive arm assembly including a motor, a gearbox, and hydraulic features for operation, including a counterbalance valve assembly, as well as improved gearbox and coupler elements operable therewith. The counterbalance valve assembly may include a cross-port relief valve and may have a first hydraulic operating circuit and a second hydraulic operating circuit. The first hydraulic operating circuit may communicate hydraulic pressure to the gearbox to enable movement of the mobile platform, and the second hydraulic operating circuit may prevent undesired communication of hydraulic pressure to the gearbox.

A vehicle includes a chassis, and a stabilizer including a support frame that has a wheel support that is configured to support at least one shaft and two wheels arranged on opposite sides relative to a longitudinal axis of said vehicle and defining a track width between said two wheels. A base supports the support frame, and a suspension connects the base relative to the chassis and is configured to allow a free vertical displacement of one of the base and the chassis relative to the other over a restricted range. A stabilizer of or for such a vehicle.

A motor drive assembly for selective rail or track operation of an excavators or other mobile platform via a source of hydraulic pressure. The motor drive assembly may include one or more drive arm assemblies mounted at ends of the mobile platform underbody, with the drive arm assembly including a motor, a gearbox, and hydraulic features for operation, including a counterbalance valve assembly, as well as improved gearbox and coupler elements operable therewith. The counterbalance valve assembly may include a cross-port relief valve and may have a first hydraulic operating circuit and a second hydraulic operating circuit. The first hydraulic operating circuit may communicate hydraulic pressure to the gearbox to enable movement of the mobile platform, and the second hydraulic operating circuit may prevent undesired communication of hydraulic pressure to the gearbox.

A regulator moldboard and grader blade assembly includes a moldboard having at least one transversely extending pin, the pin having a notch with a surface inclined toward the moldboard. At least one grader blade has at least one mounting opening having a flared surface complementary to the notch so that the blade is hangable on the pin so that the notch draws the blade against the moldboard as a fastener tightens the blade to the moldboard.

A drive unit for a road-rail vehicle having at least four wheels, for movement on rails, wherein each wheel is driven by a separate hydraulic motor. Further the hydraulic motors driving the wheels situated on one side of a longitudinal central axis of the vehicle are connected in parallel.

An improved hydraulic drive system utilizes a counterbalance units to eliminate hydraulic back pressure from rail wheel drive axel motors when the high rail drive system rail wheels are unpowered and coasting, a dedicated cavitation prevention pump to provide a constant supply of hydraulic fluid to the rail wheel drive axel motors when rail wheels are unpowered and coasting and thereby prevent cavitation, and a limited slip valve compensator that allows hydraulic fluid pressure to be equalized between rail wheel drive axel motors of the high rail drive system to ensure equalized drive forces on the rail wheels and true four wheel drive for the high rail drive system.

A rail drive system for reversibly converting a crawler mobilized machine from ground transport mobility to rail transport mobility where the machine has a rigid X-Frame underneath, rigid enveloping structure provides for releasably engaging the X-Frame in a noninvasive manner retaining the X-Frame securely in a horizontal and vertical direction, and a method is provided for achieving the same. The invention can utilize the hydraulic system of the machine itself to selectively operate all hydraulics of the invention to raise and lower rail systems to allow both ground and rail mobility as desired.

An improved hydraulic drive system utilizes a counterbalance units to eliminate hydraulic back pressure from rail wheel drive axel motors when the high rail drive system rail wheels are unpowered and coasting, a dedicated cavitation prevention pump to provide a constant supply of hydraulic fluid to the rail wheel drive axel motors when rail wheels are unpowered and coasting and thereby prevent cavitation, and a limited slip valve compensator that allows hydraulic fluid pressure to be equalized between rail wheel drive axel motors of the high rail drive system to ensure equalized drive forces on the rail wheels and true four wheel drive for the high rail drive system.