Cross country wheeled tractor, with oil motors at the driven wheels, has an intermediate setting at the control valve between forward and reverse drives where oil flow is blocked to and from the motors

摘要

The wheeled cross country tractor (1) has at least two powered wheels (2) each driven by an oil motor (9,10) linked to at least one oil pump (4) through at least one control valve (5) to reverse the oil flow. The control valve has an intermediate setting, between forward and reverse drives, where the oil flow is blocked to and from the oil motors.