Motor Vehicle Brake Fluid

Standard:
Revised:
  • 2016-07-14
 
  • CURRENT
Publisher:
  • SAE International
Pages:
24
Scope:

This SAE Standard covers motor vehicle brake fluids of the nonpetroleum type, based upon glycols, glycolethers and appropriate inhibitors, for use in the braking system of any motor vehicle such as a passenger car, truck, bus, or trailer. These fluids are not intended for use under arctic conditions. These fluids are designed for use in braking systems fitted with rubber cups and seals made from styrene-butadiene rubber (SBR), or a terpolymer of ethylene, propylene, and a diene (EPDM).

Rationale:

1. EPDM (RM69) and SBR (RM-03a) are currently tested at 70 and 120 °C. 120 °C is more aggressive, and running the test again at 70 °C does not offer any insight to a brake fluid's performance; therefore, testing EPDM and SBR at 70 °C will be discontinued.

2. With respect to EPDM at 120 °C, this test will be suspended until the Committee can decide on a specification adjustment. Testing with the reference fluid (RM66) with EPDM (RM69) yields a volume increase near 0%, and the requirement is currently 0 – 10%. A minimum requirement that has the same value as an average does not fit a best practice philosophy.

3. Testing with the reference fluid (RM66) with EPDM (RM69) on the Metal Corrosion, Wet Corrosion test can yield negative volume swell (<0.5%). The specification of 0 to 10% has been changed to ≤10% as the committee investigates a different EPDM formulation.

History:
Standard Published Revision Status
J1703_201607 2016-07-14 Latest Revised
2014-08-28 Historical Revised
2012-08-14 Historical Revised
2008-08-29 Historical Revised
2004-04-06 Historical Revised
2003-06-12 Historical Revised
2000-10-01 Historical Revised
1995-01-01 Historical Revised
1991-06-01 Historical Revised
1990-06-01 Historical Revised
1988-10-01 Historical Revised
1988-04-01 Historical Revised
1985-10-01 Historical Revised
1983-11-01 Historical Revised
1978-05-01 Historical Revised
1976-06-01 Historical Revised
1975-08-01 Historical Revised
1971-07-01 Historical Revised
1970-07-01 Historical Revised
1968-04-01 Historical Revised
1967-09-01 Historical Revised
AKA:
  • SAE J 1703
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