![]() ![]() Silicone fluid also has other advantages, it does not damage paintwork and it does not absorb water. Silicone based DOT 5 was originally introduced to give higher temperature performance over glycol DOT 4. Note the two types of fluid are not compatible and must not be mixed in a braking system. DOT 3, DOT 4, Super DOT4* and DOT 5.1 which are based on poly glycol compounds.There are two main types of brake fluids: Wet boiling point –the boiling point once the fluid has absorbed moisture (representing brake fluid after time spent in a real situation).Dry boiling point - the boiling point of fresh fluid.The DOT specifies two reference tests for brake fluids. The effect is to reduce the boiling point of the fluid, which reduces the efficiency of the braking system, as described above. ![]() If the brake fluid boils, it turns to gas, which is compressible and the braking system becomes “spongy” or in extreme cases fails completely.Ī brake system is not perfectly sealed and moisture can get into the system and be absorbed by the fluid. A braking system only works efficiently if the fluid remains incompressible. The laws of thermo-dynamics dictate that the energy from motion is turned into heat through friction. ![]() All currently available brake fluids are covered by one of the following specifications DOT3, DOT4, DOT5 and DOT5.1. These specifications relate to their boiling points and chemical composition, both of which are important. The Department of Transportation (DOT) classifies brake fluids to defined specifications. There is a degree of confusion regarding the specification of brake fluid and this article sets out to clarify the situation. Their Technical Director, Martyn Mann was on hand to give us some useful info… below is Martyn's article on brake fluids. To help dispel some myths and for some good solid general info on the mysterious world of brake fluids I decided to contact Millers Oils up in West Yorkshire. ![]()
0 Comments
Leave a Reply. |