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TM 10-6640-233-10 2-10.  Laboratory Operating Procedures. a.   Operation  of  Laboratory  Test  Equipment.    Operate  test  equipment,  as  applicable,  in  accordance  with  their respective technical manuals as listed in Appendix A. b. Physical Property Laboratory Operating Procedures.  The following is a list of tests that will be performed by the operator on every sample.  Refer to TM 38-301-1 through TM 38-301-4, Joint Oil Analysis Program (JOAP) for operating requirements and procedures.  Refer to Table 2-13 to determine significance of tests and to Table 2-14 for Oil Sample Analysis Requirements. (1)  Viscosity of Used Lubricating Fluids. (2)  Crackle Test for Water Contamination. (3)  Blotter-Spot Test. (4)  Microscopic Analysis for Insoluble Debris. (5)  Setaflash for Determination of Fuels in Used Lubrication Fluids. Table 2-13.  Lubricant Contaminants Contaminant Type Significance Analytical Method Wear metals System wear Spectrometer, Ferrograph Coolant Emulsifies oil, Crackle test; blotter impairs lubrication, spot; spectro for NA, B, destroys dispersant and SI. additives Water Corrosion, emulsifies Crackle test; blotter spot; oil, impairs lubrication spectro for NA with Marine equipment Fuel Lowers oil viscosity Viscosity; Setaflash Dirt, sand Causes abrasive wear Spectro for SI, AL; blotter spot Blowby products Increases viscosity, Viscosity, blotter spot Soot forms sludge Reactive compounds Corrosion, viscosity Viscosity, blotter spot for increase alkalinity reserve 2-43


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