BRAKE FLUID TESTING

The AutoTest Brake Fluid Tester tests the boiling point of brake fluid in less than 30 seconds

AutoTest says the most reliable method of determining the efficacy of your brake fluid is to boil it; which is exactly what the AutoTest Brake Fluid tester does.
AutoTest says many brake fluid testers measure just conductivity, not boiling point, making it very difficult to determine its efficacy which is determined by boiling point.
Brake fluid is designed to have a high boiling point, to withstand the high temperatures generated during braking. The one major drawback, due to its chemical composition, is that it absorbs moisture. This can be moisture from the air (via the breather hole in the master cylinder cap) or via the rubber hosing.
The more moisture in the brake fluid, the lower the boiling point. This increases the risk of “brake fade.” Under heavy driving conditions or on steep, winding roads or stop-start braking at high speeds, brake fluid boils and turns to vapour, and the brake pedal goes straight to the floor with no braking action.
This is known as “vapour-lock.” AutoTest says if the police are called to such an accident, unless they test the boiling point of the brake fluid, all will appear normal as the brake fluid will have cooled back down, the brake pedal will feel firm, and the driver will be faced with some serious questions.
Brake fluid is a safety-critical item, but how many drivers ask to get their brake fluid checked? AutoTest says the only approved way to test for moisture in brake fluid is to boil it.
On the back of every bottle of brake fluid is a chart showing the “dry” (uncontaminated), and “wet” (contaminated) boiling points of all the various grades of brake fluid. Brake fluid manufacturers use what’s called an ERBP (Equilibrium Reflux Boiling Point) test to determine the boiling point of brake fluid.
In a lab this can take hours to set up and complete. The AutoTest Brake Fluid tester is designed to test the boiling point of the fluid in the car in less than 30 seconds, with digital accuracy.
AutoTest says it works on all grades of brake fluid and shows clearly what the fluid has boiled at, and what the DOT minimums are for each, making the fluid change decision easy for the technician and the customer.
Once the brake fluid has been changed, garages can offer to re-test the brake fluid to clearly show the improved results on the new fluid.
AutoTest says consumers should also be aware that new brake fluid from a sealed bottle must be used for every brake change as there have been cases where brake fluid has been left in an opened bottle, effectively making the “new” fluid as contaminated as the old.

For more information, visit www.autotest.net.au