The Effect of Filter Size Rating and Oil Operating Hour on Hydraulic Oil Contamination Control Using a Developed off Board Filtering System

Abstract

This paper presents the experiment results to identify the contamination control with hydraulic oil used over 250 tons of Hitachi hydraulic excavator works on coal mining operations. The nature of this topic is to analyze the effectiveness off-board filtering systems by using different sizes of micron rating filters in a specific time interval to reduce Particles Contaminant PC06 and PC14 in hydraulic oil. Based on the analysis results, conclusions can be drawn (1) The SNR value on the filter factor reaches optimal at level 2, a combination of Filter B (2 × 10 μm and 2 × 8 μm). At the time factor, it comes optimal at level 1 (1000 h) so that the combination of filter and time that can optimize (minimize) the PC06 content in the oil is to use filter B and 1000 h. (2) There is no significant effect of the filter, time, and interaction factors on PC14. The SNR value on the filter factor reaches optimal at level 2 using Filter B (2 × 10 μm and 2 × 8 μm). At the time factor, it comes optimal at level 1 (1000 h) so that the combination of filter and time that can optimize (minimize) is to use filter B and time 1000 h. (3) There is a significant effect of the factor filter on V100. There is a substantial effect of the time factor on V100. There is no influence on the interaction between factors on V100. The proportion of each factor’s contribution to the V100 response, filter factor has an effect of 14.926%, the time factor has an impact of 10.868%, and the filter interaction factor and time affect 0.17%.