Wheel Services
Off highway tyre and rim assemblies are often subjected to loads and inflation pressures at their maximum capabilities. Construction and mining operations by their very nature can result in variations of the terrain, where higher than normal loading of individual wheel positions occur. Haulage vehicles loaded unevenly, downhill hauls with high speed turns, running a vehicle with one tyre of a dual assembly under inflated, or even flat, and others are examples of conditions that produce periodic high stresses in rim assemblies subsequently reducing fatigue life. Also, the effects of corrosion and fretting between mating parts of a rim assembly can produce surface irregularities that may result in crack initiation sites and ultimate fracture of a rim part.