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Laboratory Methods for Predicting the Viscosity Loss of Polymer Thickened Hydraulic Fluids
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1968 by SAE International in United States
Annotation ability available
Event: Mid-Year Meeting
The viscosity stability of automatic transmission fluids as measured by the sonic oscillator failed to correlate with that determined in continuous high speed driving. The development of a test based on the use of a power steering pump is described. The effects of motor speed, oil pressure, and oil temperature were determined. Test conditions are described which permit prediction of used oil viscosities for transmission fluids. This test is independent of the chemical class of the V.I. improver.
CitationStambaugh, R. and Preuss, A., "Laboratory Methods for Predicting the Viscosity Loss of Polymer Thickened Hydraulic Fluids," SAE Technical Paper 680438, 1968, https://doi.org/10.4271/680438.
- Tentative Method of Test for Sonic Shear Stability of Polymer-Containing Oils, ASTM D 2603-67T. American Society For Testing and Materials, Philadelphia.
- “The Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants.”ASTM Special Technical Publication No. 382, American Society for Testing and Materials, Philadelphia, 1964.
- VickG. K. and GoodsonR. M., “Viscosity Loss in Polymer-Thickened Lubricants,” p. 33
- KlausE. E., TewksburyE. J., JolieR. M., LloydW. A., and ManningR. E., “Effects of Some High Energy Sources on Polymer-Thickened Lubricants,” p. 45.
- LeMarR. and BootzinD., “Discrepancies Between Mechanical and Sonic Shear Methods in Evaluating Shear Stability of Hydraulic Fluids,” p. 70.
- PreussA. F., StambaughR. L., and RadtkeH. H., “The Viscosity Stability of Multigraded Crankcase Oils.” Paper 680070 presented at SAE Automotive Engineering Congress, Detroit, January 1968.
- WestJ. P. and SelbyT. W., “The Effect of Engine Operation on the Viscometric Properties of Multigraded Engine Oils.” Paper 650445 presented at SAE Mid-Year Meeting, Chicago, May 1965.
- PearceA. F., “A Laboratory Method for Predicting the Permanent Viscosity Loss of Polymeric Crankcase Oils in Field Service.” Paper 680069 presented at SAE Automotive Engineering Congress, Detroit, January 1968.