HSMOĬan be idenified by it's green color. Highest boiling point, and it does not contribute to rust or corrosion. Is not used in cars equipped with ABS because of this. It's air retention properties make it difficult to bleed air from the brake system. Very high temperatures and has no affinity to moisture. Rust and corrosion problems in the brake system. It is the most rare, the most expensive, and is not compatible with anyĭOT 3 and DOT 4 have an affinity for moistureĬausing both the reduction of the boiling point and also Hydraulic system mineral oil brake fluid is a blend of mineral oilĪnd additives. DOTĥ fluids are typically silicone-based. Sometimes used is DOT 5 fluid which can be recognized by it's purple color. So make sure to flush the brake system from time to time in order to remove the moisture.Consider changing brake fluid at 30,000 miles or during brake padģ and DOT 4, both of which are clear to amber in color. This will make your fluid’s quality degrade. Remember, there is a possibility of moisture entering the system every time you remove the reservoir cap to add fluid. The latter represents a real-world scenario as outlined by the DOT in their testing environments. On the other hand, the wet boiling point is determined by using a fluid that has been contaminated by 3.7% water. The dried boiling point is determined by using the fluid from a brand new container. There are two kinds of boiling points - dry boiling point and wet boiling point. Consequently, DOT3 boils under hard braking much easier, which makes it less suitable for activities we’ve outlined above. Both DOT3 and DOT4 are hygroscopic, meaning they absorb water.ĭue to its lower boiling point, DOT3 is more prone to water absorption. This is the temperature under which the fluid evaporates and also how prone to absorbing water it is. The basic difference between DOT3 and DOT4 is the boiling point. Note: DOT4 is compatible with DOT3 but not the other way around. DOT4 has also started to gain more popularity because of increased usage of ABS and traction control. Essentially it’s for vehicles that don’t use their braking system aggressively, ie don’t turn the kinetic energy into heat that DOT 3 can’t handle.ĭOT4 has a higher boiling point and has found its place in racing vehicles and police cars. You can expect to find that most cars and trucks use this type. The specifications detail requirements for equilibrium reflux boiling point (dry and wet boiling points), kinematic viscosities, pH values, high-temperature stability, chemical stability, corrosion, water tolerance, compatibility (sludging, sedimentation, and crystallization) and resistance to oxidation.ĭOT3 is the most common type of brake fluid used by daily drivers. With that said, they do need to meet certain requirements by the government. These brake fluids do not have to be classified by chemical composition as there are no specific requirements by the government. This means there is no typical brake fluid formula. These Glycol-based brake fluids are classified by a Department of Transportation (DOT) number: 3, 4, 5.1.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |