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Compatibility of Silicone-Base Brake Fluids with Automotive Vehicle Elastomers
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Abstract
An investigation was conducted to determine the compatibility of recently specified silicone brake fluids with elastomers expected to be found in vehicles submitted to the US Army for test and evaluation to compare their performance with conventional fluids. More than 1500 immersion tests were conducted at temperatures ranging from 0°F to 248°F (-18 to +120°C) with 14 different elastomers and 5 different brake fluids. It was found that the silicone brake fluids performed as well as/or better than the conventional fluid in all tests involving vehicle brake system elastomers. Brake performance of systems in which silicone brake fluids and conventional brake fluid become mixed will operate normally with no fluid/elastomer related problems. Contaminants such as petroleum based fluids will cause undesirable attacks on brake system elastomers regardless of the fluid in the system.
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Citation
Jordan, C., "Compatibility of Silicone-Base Brake Fluids with Automotive Vehicle Elastomers," SAE Technical Paper 810804, 1981, https://doi.org/10.4271/810804.Also In
References
- MERDC Report No. 2132, Silicone Brake Fluids; One Year Field Test February 1975
- MERADCOM Report No. 2164, Silicone Brake Fluids, Two Year Field Test January 1976
- Jordan Charles B. SAE Technical Paper 760294 One-third of a Century of Army Interest in Automotive Hydraulic Brake Fluids February 1976
- Conley James H. Jamison Robert G. SAE Technical Paper 780660 Army Experience with Silicone Brake Fluids June 1978
- Military Specification, MIL-B-46176, Brake Fluid, Silicone, Automotive, All Weather, Operational and Preservative.
- Federal Specification, VV-B-680, Brake Fluid Automotive.
- Military Specification, MIL-H-13910, Hydraulic Fluid, Polar Type, Automotive Brake, All Weather.
- Military Specification, MIL-P-46046, Preservative Fluid, Automotive Brake System and Components.
- Military Specification, MIL-L-2104, Lubricating Oil, Internal Combustion Engine (Heavy Duty).
- Military Specification, MIL-L-46167, Lubricating Oil, Internal Combustion Engine, Arctic.
- Military Specification, MIL-H-6083, Hydraulic Fluid, Petroleum Base for Preservation and Operation.