Abstract: A clamping plate 30 is disclose for securing the central disc 24 of a wheel 12 to a wheel flange 14 on an axle 16 of an agricultural vehicle. The flange 14 has a plurality of holes regularly distributed about a pitch circle and the central disc 24 of the wheel and the clamping plate 30 have holes aligned with the holes in the flange 14 for receiving bolts 26 by means of which the central disc 24 of the wheel 12 is clamped between the clamping plate 30 and the flange 14. In the invention, the outer diameter of the clamping plate 30 exceeds the diameter of the pitch circle of the holes in the clamping plate by a distance greater than twice the diameter of the bolts 26.

Abstract: An agricultural vehicle is disclosed having ancillary equipment that may be raised and lowered relative to the ground with consequential changing of the position of the centre of gravity of the vehicle and having a hydraulic braking system comprising a master cylinder and a slave cylinder. The braking system further includes a pressure relief valve for limiting the hydraulic pressure applied to the slave cylinder only when the vehicle is in road mode. This ensures that the braking force does not exceed a safe limit below which the vehicle does not risk toppling forwards when braking.

Abstract: An agricultural vehicle is disclosed having ancillary equipment that may be raised and lowered relative to the ground with consequential changing of the position of the centre of gravity of the vehicle and having a hydraulic braking system comprising a master cylinder and a slave cylinder. The braking system further includes a pressure relief valve for limiting the hydraulic pressure applied to the slave cylinder only when the vehicle is in road mode. This ensures that the braking force does not exceed a safe limit below which the vehicle does not risk toppling forwards when braking.

Abstract: An agricultural vehicle is disclosed having ancillary equipment that may be raised and lowered relative to the ground with consequential changing of the position of the center of gravity of the vehicle and having a hydraulic braking system comprising a master cylinder and a slave cylinder. The braking system further includes a pressure relief valve for limiting the hydraulic pressure applied to the slave cylinder only when the vehicle is in road mode. This ensures that the braking force does not exceed a safe limit below which the vehicle does not risk toppling forwards when braking.

Abstract: A final drive for an agricultural vehicle has a casing, a wheel shaft supported in the casing by means of two support bearings spaced from one another along the length of the wheel shaft, an input shaft rotatably supported in the casing with its axis parallel to but laterally offset from that of the wheel shaft, and a bull gear connected to the wheel shaft by means of a splined coupling disposed between the support bearings of the wheel shaft and having external teeth meshing with teeth on the input shaft to transmit torque to the wheel shaft from the input shaft. In order to reduce wear on the gearing of the final drive, the splined coupling between the bull gear and the wheel shaft is spherical.

Abstract: A cab for an agricultural vehicle has a roof structure formed of spaced inner and outer skins, wherein the separation of the skins is greater at the front of the cab than at the rear. The reduction in the depth of the roof structure at the rear allows the door height to be raised and the vertical visibility to be improved.

Abstract: A cab for an agricultural vehicle has a roof structure formed of spaced inner and outer skins, wherein the separation of the skins is greater at the front of the cab than at the rear. The reduction in the depth of the roof structure at the rear allows the door height to be raised and the vertical visibility to be improved.

Abstract: A management system is disclosed for controlling the tension of an endless track by regulating the hydraulic pressure in a hydraulic jack acting on a roller serving to tension the track. The tension management system comprises two accumulators of different capacity that are connected to the jack. Both accumulators are in permanent direct communication with the jack and the larger accumulator is preloaded to a higher pressure than the smaller accumulator.

Abstract: An agricultural vehicle is disclosed having ancillary equipment that may be raised and lowered relative to the ground with consequential changing of the position of the center of gravity of the vehicle and having a hydraulic braking system comprising a master cylinder and a slave cylinder. The braking system further includes a pressure relief valve for limiting the hydraulic pressure applied to the slave cylinder only when the vehicle is in road mode. This ensures that the braking force does not exceed a safe limit below which the vehicle does not risk toppling forwards when braking.

Abstract: A management system is disclosed for controlling the tension of an endless track by regulating the hydraulic pressure in a hydraulic jack acting on a roller serving to tension the track. The tension management system comprises two accumulators of different capacity that are connected to the jack. Both accumulators are in permanent direct communication with the jack and the larger accumulator is preloaded to a higher pressure than the smaller accumulator.

Abstract: A method and a system are disclosed for selecting the final drive gear ratio in a harvester. The method comprises the steps of selecting the desired ratio by manually depressing a button on a control panel, automatically activating a brake to bring the harvester to a standstill in response to the depression of the button on the control panel, and activating a gear selection mechanism to select the desired gear ratio only after the harvester has come to a complete stop.