Developments in Automotive brake fluid tester technology

In todays automotive aftermarket where competition is tough, the factor which often determines where your customer decides to spend their money is service. Although most mechanics know brake fluid does not last forever, very few customers know this, so it is not something they normally ask to be done. It is our responsibility to advise our customer of needed repairs and maintenance, to extend the life of their vehicle. Our advice on this will be appreciated as it will keep our customers safe and it will also generate additional revenue for your workshop. Our studies shows using old brake fluid could easily lead to all the brakes failing simultaneously under hard braking. It is possibly the most safety critical item in your car but could also be the Silent Killer in Your Car. Brake fluid has to have a wide range of attributes including a high boiling point and low cost and the end result is that most brake fluid is based on Ethylene Glycol with various additives to prevent corrosion etc. Unfortunately, Ethylene Glycol is hygroscopic and gradually absorbs moisture from the air. This slowly lowers its high boiling point until it may be only a little higher than water. This could then cause complete Brake failure under certain driving conditions. This is brake fluids dirty little secret. Most car drivers have heard of brake fade and are likely to assume that old fluid will lead to this even though they may not know what 'brake fade' actually means. It sounds a gradual process though and not one likely to cause a serious problem. Unfortunately, brake failure due to old fluid is not usually like this at all Old fluid will work perfectly well for most normal driving. The brakes get warm after slowing down but the brake fluid remains below its boiling point even when this has been seriously reduced by water absorption. So there are many drivers driving around with very dangerous fluid who are completely unaware of any danger. The problems for these drivers come when they exceed the limits of their very inadequate fluid. This may happen for a variety of reasons; the teenage son may borrow the car for the evening; or they may tow a caravan or boat; or take a trip through the mountains, or be in heavy stop/go traffic on a hot day etc Old brake fluid is not something you can use until you notice deterioration. With old fluid, one minute you have perfect brakes and the next you have none. Old fluid is literally a death trap into which many people have fallen. It is a silent killer. Reading of drivers 'falling asleep at the wheel' when they apparently drive into the back of another vehicle with no sign of braking or apparently fail to brake for a mountain bend. Some of these fatalities could be the result of old fluid boiling and usually the fluid has drained away even if the investigation is aware of this possibility. The rate at which brake fluid will absorb water and become dangerous depends on many factors: the climate, the amount and type of driving and braking, the design and condition of the braking system and components, where the car is garaged (or not), the type of fluid etc etc. Brake Fluid is designed to have a high biling point. New brake fluid will have a boiling point (with no moisture in it) of around 500degF (260degC). As the fluid absorbs moisture, through the rubber hoses and breather holes in filler caps, this critical temperature reduces. Only 3% moisture absorption in a system can take the fluid below the minimum "wet" boiling point, when the fluid should be changed. Many vehicles on the road today have fluid in them which is potentially dangerous because it may not be able to withstand the heat generated by heavy braking action without boiling. This applies particularly to vehicles over 3 years old which have been driven many miles in wet or humid conditions and/or have been left outside overnight. The best choice of Three-In-One Automotive Tester tools.

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