DETERMINATION OF THE UNKNOWNS IN CORRELATION OF LABORATORY AND CUSTOMER TEST RESULTS 560069
The development of a technique to reproduce field service failures under controlled conditions is often a difficult problem. Examples are given of a piston failure resolution, and selection of an improved injection pump plunger by use of varied operational techniques and analysis. The nature of certain failures requires the use of a test which can produce failures outside the engine. Tuning fork fatigue tests used in the development of crankshafts, springs, and rocker arms are described. The importance of the determination of all unknown factors in a parts failure cannot be overemphasized.