Technical Paper
Ferrographic Oil and Grease Analysis as Applied to Earthmoving Machinery
1975-02-01
750555
Oil analysis has been used for a number of years to determine the condition of lubricated machinery, and to predict failures from excessive wear of lubricated parts of the machine. The principal technique in use up to the present time has been spectrometric oil analysis. This technique is based on the concept that as a part wears, minute quantities of wear material enter the oil and are dispersed throughout the whole lubricating system. A sudden increase in the amount of a metal in the oil indicates that some part made of that metal has started to wear. The technique has been successful in several major applications, principally in the railroad industry on diesel locomotives and in connection with the monitoring of aircraft engines. The technique is widely used and has provided warnings of failures before they have resulted in catastrophes. Often the cause of the failure can be corrected before serious permanent damage is done to the machine.