This document provides instructions for disassembling and assembling the steering system of an industrial vehicle. It includes detailed steps and diagrams for removing and installing individual components like the steering unit housing, gearwheel set, cardan shaft, check valve, and pressure relief valve. Precise assembly instructions are given for reinstalling parts like O-rings, lip seals, bearings, and springs in their proper positions and orientations. Tightening torques are specified for mounting bolts. Tools required are also listed.