A check for the boiling point of the Brake fluid due to its hygroscopic
nature, along with contaminate due to gums and other physical
contaminates.
| RECOMMENDED TESTING SCHEDULE |
BRAKE FLUID |
TESTING LEVEL |
| Analysis |
Method |
Explanation |
Level 1 |
| Reflux Boiling Point |
FMVSS 116 |
Low boiling point is associated with water content. It can boil in the calipers or cylinder, leading to brake failure. |
YES |
|
Water Content |
ASTM D6304 |
Water contamination lowers the boiling point and promotes corrosion. |
YES |
| Retained Solids |
OL1003 |
Solids contamination contributes to wear promoting leaks and faulty operation. |
YES |
|
Appearance |
ASTM D4176 |
Appearance can quickly identify the presence of contamination. |
YES |
| pH of Fluid |
ASTM D1287 |
Brake
fluids are typically slightly alkaline. pH change is an indicator of
degradation/ contamination of the fluid. A low pH can promote corrosion. |
YES |
| Colour |
Visual |
Colour is a quick check to help establish quality of the fluid. Changes indicate degradation/contamination. |
YES |
|
Infrared Scan |
ASTM E1252 |
The infrared scan establishes the fluid base and looks for contaminates. |
YES |
|
Which tests to use 
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