Abstract: Method and arrangement for operating self-steering wheels on a non-driving axle (3) in a vehicle, which wheels (1, 2) are each mounted on their own stub axle (4, 5) and connected to a tie rod (8). The axle (3) and one (4) of the stub axles are connected by a cylinder (12) with two separate chambers (16, 17), each chamber having an individually adjustable piston (22, 23), the cylinder (12) having a first, freely movable state, in which its length is variable, and a second, pressurized state, in which its length (S3) is fixed, and in that each chamber (16, 17) has at least one connection (18, 19, 20, 21) for pressure medium for acting on the respective piston (22, 23) in the cylinder (12).

Abstract: Methods for adjusting the elevation of a vehicle chassis mounted on an air spring are disclosed including supplying pressurized air to the air spring, pressurizing the bellows portion of the air spring in order to adjust the elevation of the vehicle chassis, and pneumatically isolating the bellows from the piston portion of the air spring, whereby the time for adjusting the elevation of the vehicle chassis is minimized by effecting the adjusting and pressurizing only the bellows. Apparatus for adjusting the elevation of a vehicle chassis are also disclosed.