A sensor system for actuating the lifting of a steerable axle of a wheeled
vehicle includes at least one proximity switch mounted on a first
structure of the wheeled vehicle and at least one magnet mounted on a
second structure of the wheeled vehicle, wherein at least one of the
first and second structures pivots relative to the other structure. When
at least one of the first and second structures moves to a predetermined
position relative to the other structure, the at least one proximity
switch and the at least one magnet are aligned in close proximity,
thereby activating the proximity switch to, in turn, actuate a lift
mechanism for the steerable axle.