1) The document provides instructions for removing and refitting the front axle of a CLAAS AXION 850-810 tractor. It describes disconnecting hydraulic lines and electrical harnesses, removing fasteners and components like wheels, axle, and gearbox. 2) Dismantling and reassembling procedures are provided for the epicyclic gearbox, including removing and installing bearings, seals, and planetary gears. 3) The joint unit connecting the axle to the steering is also detailed, with steps for removing and refitting bearings, seals, and other parts in the joint box and supports.