Akbar Zulkarnain, Dehar Bagas Saefullah, Damar Isti Pratiwi, Dimas Adi Perwira, Arif Devi Dwipayana, Triana Sharly Permaisuri Arifin

Feasibility study of engine oil concerning the kinematic viscosity, water contamination, and dissolved solids pollutants on locomotive CC 206

Introduction

Feasibility study of engine oil concerning the kinematic viscosity, water contamination, and dissolved solids pollutants on locomotive cc 206. Feasibility study of engine oil for locomotive CC 206, analyzing kinematic viscosity, water contamination, and dissolved solids. Results confirm oil suitability and extended mileage.

Abstract

Lubrication can be defined as the provision of lubricating materials to a machine that aims to prevent direct contact between moving surfaces. Viscosity is a very important property in lubricating oil. Sampling of engine oil was carried out on locomotives CC 206 13 18 and CC 206 13 45 at Depo Lokomotif Sidotopo Daop 8 Surabaya. Testing of engine oil samples was carried out at the ITS Surabaya Laboratory and PT Sucofindo Surabaya based on ASTM D 445-97, ASTM D 95-13, and ASTM D 482 standards. The results of the test will be compared with the locomotive engine oil eligibility limit standard. From the tests carried out, it was found that the oil in CC 206 13 18 produced a kinematic viscosity of 15.86 cSt, water contamination of 0.07%, and dissolved solid pollutants of 0.973%. CC 206 13 45 produces a kinematic viscosity of 15.38 cSt, water contamination of 0.06%, and dissolved solid pollutants of 0.917%. From the tests on the two locomotives, it was found that the kinematic viscosity, water contamination, and dissolved solid pollutants of engine oil CC 206 13 18 and CC 206 13 45 are still within the limits of feasibility. Kinematic viscosity can affect the maximum mileage of the locomotive. The result on CC 206 13 18 is 186,962 km and on CC 206 13 45 is 194,352 km. So the oil can still be used beyond the manufacturer's specified distance limit.

Review

The submitted work, titled "Feasibility study of engine oil concerning the kinematic viscosity, water contamination, and dissolved solids pollutants on locomotive CC 206," presents an investigation into the condition of engine oil from two specific locomotives. The primary objective was to assess the oil's suitability for continued use by analyzing key parameters: kinematic viscosity, water contamination, and dissolved solids. The abstract outlines a methodology involving the sampling of oil from locomotives CC 206 13 18 and CC 206 13 45, followed by laboratory testing using established ASTM standards. This study holds practical relevance for locomotive maintenance and operational efficiency, aiming to prevent direct contact between moving surfaces and potentially extend the service life of engine lubricants. A key strength of this study lies in its direct application to real-world operational assets and the utilization of recognized international standards (ASTM D 445-97, ASTM D 95-13, and ASTM D 482) for sample analysis. The results indicate that for CC 206 13 18, the kinematic viscosity was 15.86 cSt, water contamination 0.07%, and dissolved solids 0.973%. Similarly, for CC 206 13 45, these values were 15.38 cSt, 0.06%, and 0.917%, respectively. Crucially, the authors conclude that all measured parameters for both locomotives are within their respective feasibility limits. Furthermore, the study suggests that the oil can be used beyond the manufacturer's specified distance, projecting extended mileages of 186,962 km for CC 206 13 18 and 194,352 km for CC 206 13 45, representing a potentially significant economic benefit. While the findings are positive for the two sampled locomotives, several aspects warrant further detail and consideration for future work. A significant limitation is the extremely small sample size (only two locomotives), which severely restricts the generalizability of the "feasibility study" conclusion to the broader CC 206 fleet. To truly establish broader feasibility or optimal oil change intervals, a more extensive study encompassing more locomotives, varied operating conditions, and perhaps different oil types would be necessary. Furthermore, the abstract lacks critical information regarding the specific "locomotive engine oil eligibility limit standard" values against which the measured data were compared; without these reference points, the reader cannot independently verify the "within limits" claim. The methodology for calculating the extended "maximum mileage" based on kinematic viscosity is also not elucidated, which is a key finding that requires transparency. Expanding on these methodological details and acknowledging the limitations of a small sample size would greatly enhance the rigor and impact of this otherwise practically useful initial investigation.

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