Abstract: An industrial truck having height-adjustable load bearing means, lifting height controls in which a plurality of predetermined lifting heights are saved, a lifting height detection system for the load bearing means that detects an actual value of the lifting height and provides it to the lifting height controls, and a control unit that allows the lifting height of the load bearing means to be manually adjusted at different speeds, wherein the lifting height controls move the load bearing means to one of the predetermined lifting heights when the speed for adjusting the load bearing means specified by the control unit falls below a predetermined threshold, wherein the lifting height assumed by the lifting height controls corresponds to the lifting height of the predetermined lifting heights that most closely approximates the actual value of the lifting height in the direction in which the load bearing means is moving.

Abstract: An industrial truck having height-adjustable load bearing means, lifting height controls in which a plurality of predetermined lifting heights are saved, a lifting height detection system for the load bearing means that detects an actual value of the lifting height and provides it to the lifting height controls, and a control unit that allows the lifting height of the load bearing means to be manually adjusted at different speeds, wherein the lifting height controls move the load bearing means to one of the predetermined lifting heights when the speed for adjusting the load bearing means specified by the control unit falls below a predetermined threshold, wherein the lifting height assumed by the lifting height controls corresponds to the lifting height of the predetermined lifting heights that most closely approximates the actual value of the lifting height in the direction in which the load bearing means is moving.

Abstract: Method for the adjustment of a control current of current-controlled, hysteresis-affected hydraulic valves for the actuation of individual hydraulic functions of industrial trucks, the control current being generated in an electronic control device according to a manually pre-set transmitter signal, characterised by the following steps for each hydraulic function which is controlled by a hydraulic valve, an average characteristic line I=f(Q) is determined by experiments or via calculation, in which I is the control current and Q is the volume flux of the hydraulic medium flowing through the hydraulic valve, the specific characteristic line I.sub.

Abstract: Method for the adjustment of a control current of current-controlled, hysteresis-affected hydraulic valves for the actuation of individual hydraulic functions of industrial trucks, the control current being generated in an electronic control device according to a manually pre-set transmitter signal, characterised by the following steps for each hydraulic function which is controlled by a hydraulic valve, an average characteristic line I=f(Q) is determined by experiments or via calculation, in which I is the control current and Q is the volume flux of the hydraulic medium flowing through the hydraulic valve, the specific characteristic line Ires=f(Q) is measured for each individual hydraulic valve, and a first average control current value for a predetermined volume flux value is determined from the characteristic line values, between the first average control current value and a second average control current value, which is derived from the determined characteristic line I=f(Q) at the pre-set volume flux val