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Two high performance industrial machines, the 3400 and 3500 International industrial loader-backhoe, featuring a balanced system of loader integral frame tractor and backhoe design have been introduced to the market. These combinations with matched hydraulic systems optimize operator comfort with machine durability and productivity.

As the American farmer continues to substitute capital and technology for labor, his need for more powerful tractors will increase. Utilization of this increased power can be achieved by the use of tools with greater working widths, performance of several combined operations in one pass, and increasing the field speed at which the various operations are performed. This paper explores some of the advantages (and disadvantages) of high tractor field speeds, first from the farmer's viewpoint and second from the engineer's or manufacturer's viewpoint.

Past experience in the design of construction equipment has shown the importance of being able to assess as accurately as possible the predicted life of a machinery's structural components. A procedure is described wherein, through proper initial planning of tests, data may be obtained that will facilitate the prediction of future component designs. From the information secured, it becomes possible to graphically relate a component's stress-time history and thereby arrive at a suitable requirement for a new design.