Machine with ground working elements providing improved stability

A machine comprising:

• a chassis having ground engaging wheels,
• at least two ground working units mounted on the chassis at locations spaced in a first direction, each working unit having a ground engaging element and being liftable with respect to the chassis from a working position in which the respective ground engaging element is in ground contact;
• an inclinometer structured and operable to monitor an inclination of the chassis in the first direction with respect to the horizontal;
• and
• a controller structured and operable to receive an inclination value from the inclinometer and configured when the inclination value exceeds a defined threshold to lift that one of the working units that is by virtue of the inclination at a higher level than the other of the working units;
• wherein each working unit is mounted on a lift arm extending in the first direction, the lift arm being rotatable with respect to the chassis about an axis extending in the forward direction;
• and
• wherein the lift arm is rotatable with respect to the chassis from a working position in which the working unit is essentially horizontal to a transport position in which the working unit is essentially vertical, the controller being configured when the inclination value exceeds a defined threshold to rotate the lift arm of that one of the working units to a stability lift position intermediate the working and transport positions.

A method of operating a machine, the machine comprising a chassis having ground engaging wheels;

• at least two ground working units mounted at an outward end of a respective at least one lift arm, each lift arm rotationally mounted at an inward end to the chassis such that the working units are mounted at locations spaced in a first direction transverse to a direction of forward motion of the machine, and being liftable, via the respective lift arm, with respect to the chassis from a working position;
• said method comprising:
• measuring an inclination of the chassis in the first direction, transverse to the forward direction, with respect to the horizontal;
• and
• in dependence upon the measured inclination lifting, via the respective lift arm, one only of the at least two working units from a working position in which a substantial proportion of the weight of the working unit is borne by the ground, to a stability lift position in which a substantial proportion of the weight of the working unit is borne by the chassis to improve the stability of the chassis with regard to the inclination in the first direction.