Abstract: A method of operating a working machine which includes a main structure and a working arm pivotally mounted at one end on the main structure. The working arm is raisable and lowerable relative to the main structure by a first actuator device, and is extendible relative to the main structure by a second actuator device. In use, the arm carries at another end a working implement which can carry a load. The machine further including a ground engaging drive structure by which the machine is drivable on the ground. The machine has a longitudinal load moment control system which automatically disables operation of the first and/or second actuator devices from increasing longitudinal instability in the event that a predetermined instability is sensed. When the machine senses a ground travelling speed above a threshold speed, the longitudinal load moment control system is disabled.

Abstract: A control system for a machine which includes a load handling apparatus, the load is moveable relative to a body of the machine by the load handling apparatus. The machine including a pivot about which a tipping moment is produced by the load. The load handling apparatus including an actuator and is capable of moving the load to a position at which the tipping moment is at a predetermined threshold value. The control system includes a sensor which senses the tipping moment and in use, provides an input to a controller. The controller is responsive to the input to influence operation of the actuator so that in the event that the sensor senses that the value of the tipping moment is approaching the threshold value, the speed of movement of the load is progressively reduced.

Abstract: A control system for a machine which includes a load handling apparatus for moving a load relative to a body of the machine. The machine includes a pivot about which a tipping moment is produced by the load. The load handling apparatus includes an actuator capable of moving the load to a position at which the tipping moment is at a threshold value. The control system is responsive to a tipping moment sensor to control operation of the actuator to progressively reduce the speed of movement of the load as the threshold value of the tipping moment is approached.

Abstract: A method of operating a working machine which includes a main structure and a working arm pivotally mounted at one end on the main structure. The working arm is raisable and lowerable relative to the main structure by a first actuator device, and is extendible relative to the main structure by a second actuator device. In use, the arm carries at another end a working implement which can carry a load. The machine further including a ground engaging drive structure by which the machine is drivable on the ground. The machine has a longitudinal load moment control system which automatically disables operation of the first and/or second actuator devices from increasing longitudinal instability in the event that a predetermined instability is sensed. When the machine senses a ground travelling speed above a threshold speed, the longitudinal load moment control system is disabled.