A vehicle includes a chassis, ground-engaging elements configured to support the chassis, support assemblies supporting the chassis on the ground-engaging elements, adjustable axles configured to change a lateral distance from the chassis to each of the support assemblies, and a controller configured to move the chassis laterally along the axles without changing a track width between ground-engaging elements on opposing sides of the chassis. Disclosed methods may be used to remove and install application systems on the vehicle.

An apparatus for estimating vehicle weight using a vehicle height adjusting device is provided. The apparatus includes a vehicle height adjusting device that raises or lowers four positions of front left (FL) and right (FR) sides and rear left (RL) and right (RR) sides of a vehicle body, respectively. A vehicle height controller operates the vehicle height adjusting device to raise or lower the FL and FR sides and the RL and RR sides of the vehicle body. A weight estimating unit measures time required for raising or lowering the vehicle body or operating speed of the vehicle body and calculates an expected vehicle weight value by comparing the time required or the operating speed with a preset reference data.

An apparatus for estimating vehicle weight using a vehicle height adjusting device is provided. The apparatus includes a vehicle height adjusting device that raises or lowers four positions of front left (FL) and right (FR) sides and rear left (RL) and right (RR) sides of a vehicle body, respectively. A vehicle height controller operates the vehicle height adjusting device to raise or lower the FL and FR sides and the RL and RR sides of the vehicle body. A weight estimating unit measures time required for raising or lowering the vehicle body or operating speed of the vehicle body and calculates an expected vehicle weight value by comparing the time required or the operating speed with a preset reference data.

A vehicle including a controlled vertical position chassis, in order to be able to be moved into a low position supported on the ground, and, associated with each wheel, a suspension arm, an arm actuator, and a safety device capable of limiting the accidental lowering of the chassis, the device being able to adopt an active state wherein the rotation of the suspension arm can be limited, the device including an actuator, a cylinder of which is mounted on the chassis and a piston of which is mounted on the suspension arm, or vice versa, the actuator defining a first chamber connected to a first and a second fluid passage through the cylinder, the second passage being connected to a first fluid pipe fitted with a safety valve.

A vehicle including a controlled vertical position chassis, in order to be able to be moved into a low position supported on the ground, and, associated with each wheel, a suspension arm, an arm actuator, and a safety device capable of limiting the accidental lowering of the chassis, the device being able to adopt an active state wherein the rotation of the suspension arm can be limited, the device including an actuator, a cylinder of which is mounted on the chassis and a piston of which is mounted on the suspension arm, or vice versa, the actuator defining a first chamber connected to a first and a second fluid passage through the cylinder, the second passage being connected to a first fluid pipe fitted with a safety valve.

Methods and systems are provided for a vehicle suspension system. In some example methods, a height change request is received for a vehicle suspension having a displacement control for implementing height change requests. A displacement of at least one spring of the vehicle suspension may be determined, as well as whether the displacement satisfies a displacement control criteria. The height of the vehicle suspension may be changed using an air mass control in response to determining the displacement control criteria is not satisfied.

A system and a method for securing an attachment to a work vehicle with a chassis and a suspension are described. A mounting frame with a frame attachment point disposed on a support can be attached to a work vehicle. The suspension can be caused to lower the mounting frame relative to ground by lowering the chassis of the work vehicle. The work vehicle can be maneuvered to align the frame attachment point with a corresponding attachment point on the attachment. The suspension can then be caused to raise the mounting frame relative to ground by raising the chassis of the work vehicle. The frame attachment point can thereby engage the corresponding attachment point on the attachment, as the mounting frame is raised, in order to lift the attachment, with the attachment being thereby supported by the work vehicle solely via the mounting frame.

A system and a method for securing an attachment to a work vehicle with a chassis and a suspension are described. A mounting frame with a frame attachment point disposed on a support can be attached to a work vehicle. The suspension can be caused to lower the mounting frame relative to ground by lowering the chassis of the work vehicle. The work vehicle can be maneuvered to align the frame attachment point with a corresponding attachment point on the attachment. The suspension can then be caused to raise the mounting frame relative to ground by raising the chassis of the work vehicle. The frame attachment point can thereby engage the corresponding attachment point on the attachment, as the mounting frame is raised, in order to lift the attachment, with the attachment being thereby supported by the work vehicle solely via the mounting frame.

The vehicle height adjustment device includes: a vehicle height adjuster which adjusts vehicle height; a prohibiting mode setter which sets a prohibiting mode that prohibits vehicle height adjustment by the vehicle height adjuster; a first prohibition release unit which performs release of the prohibiting mode in the prohibiting mode setter; and a second prohibition release unit which enables vehicle height adjustment by the vehicle height adjuster, while the prohibiting mode is set by the prohibiting mode setter.

The vehicle height adjustment device includes: a vehicle height adjuster which adjusts vehicle height; a prohibiting mode setter which sets a prohibiting mode that prohibits vehicle height adjustment by the vehicle height adjuster; a first prohibition release unit which performs release of the prohibiting mode in the prohibiting mode setter; and a second prohibition release unit which enables vehicle height adjustment by the vehicle height adjuster, while the prohibiting mode is set by the prohibiting mode setter.