1.范围本国际标准规定了至少有两个装有充气轮胎轴的农业轮式拖拉机的正常和紧急转向模式的性能标准；它不适用于履带式或滑移式农业拖拉机。本国际标准中的要求并不意味着，如果拖拉机能源出现故障，则必须安装其他装置。但是，如果拖拉机配备了这些装置，则这些要求是强制性的。注1-拖拉机的所有车轮都可以是转向轮。

1. ScopeThis International Standard specifies performance criteria for normal and emergency steering modes for agricultural wheeled tractors having at least two axles fitted with pneumatic tires; it does not apply to track-type or skid-steered agricultural tractors.The requirements in this International Standard do not imply that additional devices are mandatory if the tractor energy source fails. However, if the tractor is equipped with these devices, then the requirements are mandatory.NOTE 1 - All wheels of the tractor may be steered wheels.