A harvesting machine, in particular in the form of a forage harvester, for harvesting harvested material located on a working field, comprising at least two track roller units which are disposed on opposite ends of a front axle of the harvesting machine, the track roller units respectively comprising - two main wheels (7, 8) disposed one behind the other in the direction of travel of the harvesting machine, - at least one auxiliary wheel disposed between the main wheels (7, 8), as well as - at least one endless belt spanning the main wheels (7, 8), wherein the auxiliary wheel can cooperate with a lower section of the endless belt so that forces to be deflected into the ground via the respective track roller unit can be at least partially deflected by means of the auxiliary wheel, characterized in that at least one lifting unit is respectively disposed on the track roller units, by means of which the front main wheel of the two main wheels (7, 8) of the respective track roller unit in the direction of travel can be transferred from a null position into a lifted position and wherein a lifting unit is associated with the at least one auxiliary wheel, wherein the harvesting machine has at least one control device, by means of which the transfer of the front main wheel can be automatically initiated as a function of a steering angle of the harvesting machine, wherein all of the lifting units (12, 18) cooperate with a common hydraulic system, and at least one lifting unit associated with the at least one auxiliary wheel can be temporarily disconnected from the common hydraulic system. at least two track roller units which are disposed on opposite ends of a front axle of the harvesting machine, the track roller units respectively comprising - two main wheels (7, 8) disposed one behind the other in the direction of travel of the harvesting machine, - at least one auxiliary wheel disposed between the main wheels (7, 8), as well as - at least one endless belt spanning the main wheels (7, 8), - two main wheels (7, 8) disposed one behind the other in the direction of travel of the harvesting machine, - at least one auxiliary wheel disposed between the main wheels (7, 8), as well as - at least one endless belt spanning the main wheels (7, 8), wherein the auxiliary wheel can cooperate with a lower section of the endless belt so that forces to be deflected into the ground via the respective track roller unit can be at least partially deflected by means of the auxiliary wheel, characterized in that at least one lifting unit is respectively disposed on the track roller units, by means of which the front main wheel of the two main wheels (7, 8) of the respective track roller unit in the direction of travel can be transferred from a null position into a lifted position and wherein a lifting unit is associated with the at least one auxiliary wheel, wherein the harvesting machine has at least one control device, by means of which the transfer of the front main wheel can be automatically initiated as a function of a steering angle of the harvesting machine, wherein all of the lifting units (12, 18) cooperate with a common hydraulic system, and at least one lifting unit associated with the at least one auxiliary wheel can be temporarily disconnected from the common hydraulic system.