Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/120548
CONTAMINATION CONTROL and adjusted to the loading shovel. The hoses, connectors, protective metal frame, etc., were all in good condition, and the onboard particle counter was operating properly. While the microThe exterior of the microfilters filters were being showed powder impregnation as changed, a dark the result of operation. color was noticed in the filter cartridges along with visible particles on the surface. In the bottom of the filter containers, some diesel fuel was discovered that was clean and dry. After the microfilters were changed and the caps were sealed, the loading shovel was turned on, and the microfiltration unit showed no signs of diesel fuel leakage. When the two used filter cartridges were weighed at the Yanacocha laboratory, it was confirmed that both used microfilter elements had a greater weight concentration of pollutants in comparison to a new filter element. When the microfilters were changed, a dark color was noticed in the filter cartridges along with visible particles on the surface. Solid particles were removed from the microfilters and analyzed at the laboratory. An additional particle analysis was performed to determine the origin of the particles larger than 40 microns trapped in the filter cartridges. Fuel residue was removed from the bottom of the filter containers. 40 March - April 2013 | www.machinerylubrication.com When the diesel fuel was examined in the loading shovel, the ISO code level of the fuel that reached the diesel tank after microfiltration was determined to be ISO 17/15/14. This met the requirements stipulated by the engine manufacturer for diesel fuel B5. In the laboratory, tests were performed on diesel fuel samples that were taken on two different days. The final results showed the cleanliness level was ISO 15/12. When the fuel level in the tank is low, the number of times microfiltration is performed on the remaining fuel in the tank increases. Conclusions Since installation of the microfiltration system in the loading shovel's diesel tank, its condition and operation have met all expectations, confirming the system's effectiveness and efficiency. The filters capably remove contaminants, significantly reducing the risk of wear for the pumps and injectors. Diesel fuel entering the microfiltration unit is pulled from two separate points located at the bottom of the tank, preventing the accumulation of "hidden" water, sediments and contaminants that affect the daily refill of clean diesel fuel. The diesel fuel in the shovel is maintained at an ISO code level of 17/15/14 (or less in continuous operation). It is important to note that when the fuel level in the tank is low, the number of New filter cartridges were installed with new seals placed on the edges times microfiltration is of the caps to prevent fuel leakage. performed on the remaining fuel in the tank increases, ensuring the cleanliness of the fuel in the bottom of the tank and preventing accumulation of sediment, particles and water. This also guarantees constant cleaning of the fuel tank during continuous operation of the loading shovel.