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In This Issue
| - Sampling Diesel Engine Oils
- How to Inspect a Gearbox
- 2 Most Common Types of Mineral Base Oils
- Why New Oil Color Varies
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| Sampling Diesel Engine Oils |
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When taking oil samples from diesel engines, the oil sample should be taken before the lube filter if the intent is to determine the health of the engine. Sampling before the filter ensures the sample will contain contamination, which will indicate excessive wear in the engine. If the intent is to determine the quality of the oil fed to the engine, the sample should be taken after the filter. This is also a great way to confirm whether the filter is performing properly. (Greg Schmelz, Alfa Laval Inc.)
Join us in Orlando, Fla., on June 12-14 for
Machinery Lubrication training.

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Onsite gearbox inspections should be seen as preventative maintenance. Problems caught early and corrected can prevent catastrophic, costly and dangerous failures down the road. Although a comprehensive onsite gearbox inspection is desirable in many situations, there may be constraints that limit the extent of the inspection such as cost, time, accessibility and qualified personnel. Learn the equipment and techniques necessary to perform an onsite gearbox inspection, as well as the sources of gearbox contamination.
| FULL STORY
Test your knowledge and prepare for ICML lubrication and oil analysis certification.
Question: Name the two most common types of mineral base oils. Which would have the highest viscosity index? Which would have the lowest pour point?
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Slight changes in the color or darkness of mineral oils often occur due to differences in crude stock. Color bodies in mineral oils are generally associated with sulfur or aromatic impurities. The darker the base oil, the more of these impurities can usually be found. Certain additives also contribute to color, especially those containing sulfur. Find out when the color of new oil is cause for concern.
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Poll Question: Do you consider an oil's viscosity index when selecting a lubricant?
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