Lift axles were in use in the early 1940s. Initially, the axle was lifted by a mechanical device. Soon hydraulics replaced the mechanical lift system. One of the early manufacturers was Zetterbergs, located in Östervåla, Sweden. Their brand was Zeta-lyften.
lift axles were in use in the early 1940s initially the axle was lifted by a mechanical device soon hydraulics replaced the mechanical lift system one of the early manufacturers was zetterbergs located in östervåla sweden their brand was zeta-lyften