The beginning of serial production of the LKT 81 model, produced unchanged until 1993, the amount of the individual machines produced climbed up to 6000.

In the same year the factory in Trstena took over the manufacture of the then most efficient type LKT 120, designed to be exported into the former states of the Soviet Union and into Germany. The machine was manufactured in two basic modifications: the basic machine LKT 120 A and a trailer tractor LKT 120 B designed for wood sliding using a grab claw located on a hinged arm.