A levelling assembly is provided, for levelling an upper carriage assembly of a machine with respect to an undercarriage assembly having a first track roller frame and the second track roller frame. A levelling body is rotatably coupled to the first track roller frame and the second track roller frame and defines a first side and a second side laterally opposite to the first side. The levelling assembly includes a first pair of fluid actuators for movably coupling first side of the levelling body with the first track roller frame and a second pair of fluid actuators for movably coupling second side of the levelling body with the second track roller frame. The first and the second pair of fluid actuators move the levelling body between a fore tilted position and an aft tilted position relative to the first and the second track roller frames.

A levelling assembly is provided, for levelling an upper carriage assembly of a machine with respect to an undercarriage assembly having a first track roller frame and the second track roller frame. A levelling body is rotatably coupled to the first track roller frame and the second track roller frame and defines a first side and a second side laterally opposite to the first side. The levelling assembly includes a first pair of fluid actuators for movably coupling first side of the levelling body with the first track roller frame and a second pair of fluid actuators for movably coupling second side of the levelling body with the second track roller frame. The first and the second pair of fluid actuators move the levelling body between a fore tilted position and an aft tilted position relative to the first and the second track roller frames.

Track system to be mounted on a vehicle in place of a rotatable OEM tire/wheel assembly, including: A frame. A drive wheel is rotatably mounted on the frame, operatively connectable to the drive shaft of the vehicle, and has a diameter of between 65% and 100% of the OEM tire diameter. Leading and trailing idler wheel assemblies are mounted on the frame. An endless track having an inner surface is disposed around the drive wheel, the leading and trailing idler wheel assemblies. The endless track has an unsupported portion between the drive wheel and one of the leading and trailing idler wheel assemblies. The unsupported portion has a length and a center. The unsupported portion deflects a distance of between 8% and 12% of its length on application of a 25-lb. force at its center.

A track system for traction of a vehicle comprising a track to engage the ground and comprising elastomeric material, a ground-engaging outer side and an inner side opposite to the ground-engaging outer side. The track system also comprises a track-engaging arrangement for driving and guiding the track around the track-engaging arrangement, which comprises: a drive wheel for movement of the track; a leading idler wheel and a trailing idler wheel spaced apart in a longitudinal direction of the track system, and a plurality of roller wheels between the idler wheels. The track system also comprises a frame supporting the idler and roller wheels. The track system also comprises a plurality of mounts spaced apart in the longitudinal direction of the track system to interconnect the frame of the track system to the vehicle frame, and allow movement of the frame of the track system relative to the vehicle frame.

A track system for traction of a vehicle comprising a track to engage the ground and comprising elastomeric material, a ground-engaging outer side and an inner side opposite to the ground-engaging outer side. The track system also comprises a track-engaging arrangement for driving and guiding the track around the track-engaging arrangement, which comprises: a drive wheel for movement of the track; a leading idler wheel and a trailing idler wheel spaced apart in a longitudinal direction of the track system, and a plurality of roller wheels between the idler wheels. The track system also comprises a frame supporting the idler and roller wheels. The track system also comprises a plurality of mounts spaced apart in the longitudinal direction of the track system to interconnect the frame of the track system to the vehicle frame, and allow movement of the frame of the track system relative to the vehicle frame.

A track-module apparatus comprising: (a) idler-arm axle structure for a vehicle and having leading and trailing idler-arm axles; (b) a leading idler arm rotatably attached to the leading idler-arm axle and extending forwardly to a leading-arm distal end at which a leading ground-engaging idler wheel is rotatably attached and rearwardly to a rearward suspension end; (c) a trailing idler arm rotatably attached to the trailing idler-arm axle and extending rearwardly to a trailing-arm distal end at which a trailing ground-engaging idler wheel is rotatably attached and forwardly to a forward suspension end; (d) bogie-axle structure (i) affixed to one of the idler arms, (ii) having at least one bogie-arm axle, and (iii) positioning the at least one bogie-arm axle adjacent to and below the idler-arm axle of the idler arm to which it is affixed; (e) leading-arm and trailing-arm suspension elements rotatably attached to and extending downwardly from the rearward and forward suspension ends, respectively, and each having a lower end; (f) front and rear bogie connecting arms rotatably attached to the front and rear axles, respectively, and extending forwardly and rearwardly to rotatable attachments at the leading-arm and trailing-arm suspension-element lower ends, respectively; (g) front and rear ground-engaging bogie-wheel sets rotatably attached to distal ends of the front and rear bogie connecting arms, respectively; and (h) an endless track extending around the wheels.

A track-module apparatus comprising: (a) idler-arm axle structure for a vehicle and having leading and trailing idler-arm axles; (b) a leading idler arm rotatably attached to the leading idler-arm axle and extending forwardly to a leading-arm distal end at which a leading ground-engaging idler wheel is rotatably attached and rearwardly to a rearward suspension end; (c) a trailing idler arm rotatably attached to the trailing idler-arm axle and extending rearwardly to a trailing-arm distal end at which a trailing ground-engaging idler wheel is rotatably attached and forwardly to a forward suspension end; (d) bogie-axle structure (i) affixed to one of the idler arms, (ii) having at least one bogie-arm axle, and (iii) positioning the at least one bogie-arm axle adjacent to and below the idler-arm axle of the idler arm to which it is affixed; (e) leading-arm and trailing-arm suspension elements rotatably attached to and extending downwardly from the rearward and forward suspension ends, respectively, and each having a lower end; (f) front and rear bogie connecting arms rotatably attached to the front and rear axles, respectively, and extending forwardly and rearwardly to rotatable attachments at the leading-arm and trailing-arm suspension-element lower ends, respectively; (g) front and rear ground-engaging bogie-wheel sets rotatably attached to distal ends of the front and rear bogie connecting arms, respectively; and (h) an endless track extending around the wheels.

A transition track slider has a hollow body including a first side surface, a second side surface, a bottom surface at least partially interposed between the first side surface and the second side surface, and that also defines a cavity. A front surface with a bullet nose configuration connects the first side surface to the second side surface, and to the bottom surface, while a rear surface connects the first side surface to the second side surface, and to the bottom surface. A top surface extends from the rear surface toward the front surface.

A transition track slider has a hollow body including a first side surface, a second side surface, a bottom surface at least partially interposed between the first side surface and the second side surface, and that also defines a cavity. A front surface with a bullet nose configuration connects the first side surface to the second side surface, and to the bottom surface, while a rear surface connects the first side surface to the second side surface, and to the bottom surface. A top surface extends from the rear surface toward the front surface.

A harvester and a method for harvesting a crop is disclosed. The harvester includes two track drives positioned on opposite ends of a front axle of the harvester, each of the track drives including two main wheels that are arranged successively in the driving direction of the harvester, at least one auxiliary wheel positioned between the main wheels, and at least one track that surrounds the main wheels. The auxiliary wheel can interact with a bottom section of the track so that the forces to be deflected via the particular track drive into ground can be deflected at least proportionately using the auxiliary wheel. To reduce the shearing forces into the ground when the harvester turns, a control unit, depending on the steering angle of the harvester, controls a lifting unit to lift a front main wheel of a particular track drive from its home position to a lifted position.