This European Standard specifies steering system tests and performance criteria for evaluating the steering capability of rubber-tyred self-propelled earth-moving machines having a machine speed, determined in accordance with It applies to tractors, loaders, backhoe loaders, excavators, dumpers, tractor-scrapers and graders equipped with either manual (unassisted) steering, power-assisted steering of fully powered steering as defined in ISO 6165:1997. This European Standard excludes rollers, compactors and pipelayers.