Preventive and predictive maintenance to increase availability and reliability in Cat797f-Haa truck engines at Chinalco Mining

Abstract

The Mining Company Chinalco Peru SA, in its evaluation to improve operating conditions of its 16 units, decided to migrate from mineral oil Mobil Delvac MX 15W-40 to synthetic oil Mobile Delvac 1Esp 5W-40, to obtain benefits in increased availability of equipment. In this research, predictive maintenance to a sample of two trucks, CM 102 and CM 103, was performed to assess their conditions with synthetic oil in a total of 66 samples, to examine the presence of metal in the oil, such as copper, iron and silicon; obtaining these results through the program Signum Oil Analysis. The result was that for 750 hours they did not exceed the critical values recommended by SOS CAT. A preventive maintenance plan for the time intervals with synthetic oil was also implemented. The presence of copper, iron and silicon, did not exceed 27ppm, 41ppm and 8 ppm values respectively, concluding that the oil change interval is correct. The change from mineral oil to synthetic, represented annual savings for a total amount of US$ 2744510,72.