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Oil Friction Retention Measured by Caterpillar Oil Test No. TO-2
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English
Abstract
Increased slip time during shifts with bronze-on-steel friction material occurred in power shift transmissions. This condition caused slow response and overheated friction surfaces.
Full scale laboratory testing in a D7E track-type Tractor setup was conducted. Oil formulations with poor field performance gave the same relative results in the laboratory test work.
The Oil Test No. TO-2 was developed using the SAE No. 2 Friction Test Device. Correlation of the Oil Test No. TO-2 data with the full scale laboratory data is shown. Finally, reference oil data from the independent test laboratories using the Oil Test No. TO-2 is included to show the reproducibility and repeatability of the Oil Test No. TO-2.
Authors
Citation
McLain, J., "Oil Friction Retention Measured by Caterpillar Oil Test No. TO-2," SAE Technical Paper 770512, 1977, https://doi.org/10.4271/770512.Also In
References
- Engine Oil Performance and Engine Service Classification SAE J183a SAE Handbook 1975
- Schwarz C. F. “Latest Development in Military Specification Oils” National Petroleum Refiner's Annual Meeting San Antonio April 1970
- Olson A. B. “Evaluation of Friction Materials” Paper 720366 SAE Earthmoving Industry Conference Peoria, IL April 1972
- SAE No. 2 Clutch Friction Test Machine Test Procedure SAE J286 SAE Handbook 1975
- Smith G. R. Ross W. D. Silbert P. L. Herndon W. E. “Putting Automatic Transmission Clutch Friction Researchers on Speaking Terms” Paper 670051 SAE Automotive Engineering Congress Detroit January 1967
- Frilhauf Edward J. “Automatic Transmission Fluids - Some Aspects on Friction” Paper 740051 SAE Automotive Engineering Congress Detroit March 1974
- Haviland M. L. Anderson R. L. Davison E. D. Goodwin M. L. Osborne R. E. “Dexron R -II Automatic Transmission Fluid Performance” Paper 740053 SAE Automotive Engineering Congress Detroit March 1974
- Fish Robert L. “Oil - Friction Material Interaction and the Effects of Conditions of Use” Paper 740655 SAE National Combined Farm Construction & Industrial Machinery and Powerplant Meetings Milwaukee September 1974