Brake fluid is a type of
hydraulic fluidused in hydraulic brakeapplications in motorcycles, automobiles, light trucks, and some advanced bicycles. It is used to transfer force under pressure from where it is created through hydrauliclines to the braking mechanism near the wheels. It works because liquids are not appreciably compressible. Braking applications produce a lot of heat, so brake fluid must have a high boiling pointto remain effective, and must also not freezeunder normal temperatures. These requirements eliminate most water-based solutions.
Compatibility issues may exist between
DOT 3/ DOT 4brake systems and DOT 5fluid. Specifically, DOT 5silicon fluid may attack and harden some silicon based rubber seals such as caliper piston boots, which will cause the system to leak. Various grades of both DOT 3and DOT 4fluid exist with different temperature ratings for different applications and manufacturer requirements for fluid types should be followed. [ [http://www.xs11.com/tips/maintenance/maint1.shtml Tech Tip: Brake fluid debate ] ]
It is important to note the difference between
DOT 5that is silicone-based brake fluid and DOT 5.1that is polyethylene glycolbased similar to DOT 3and DOT 4.
Some very old British cars use
Girlingbrakes, which are incompatible with DOT3 brake fluid. British-car dealers are careful in observing this precaution; but UK law does not require such observations be taken by commercial garages. Glycolbased fluids are half as compressible as silicone type fluids, even when heatedFact|date=April 2008. Less compressibility of brake fluid will increase pedal feel (firmness), but in either case this effect is minimal. The U.S. Army has used silicone brake fluid exclusively since 1982 successfully. Glycolsare hygroscopicand will absorb water from the atmosphere, reducing the boiling point of the fluid and degrading hydraulic efficiency. Changing fluid on a regular basis will greatly increase the performance of the brake system, but this is often not a concern in passenger cars. On the other hand, changing fluid at least every several years will preserve the life of brake system components (by removing accumulated water and other contaminants, thereby reducing rust on internal components), and increase the overall reliability of the brake system. Polyethylene glycol, and other brake fluid ingredients may be corrosiveto paint and finished surfaces such as chrome, and thus care should be taken when working with the fluid. Additionally, polyethylene glycol, in the concentrations found in DOT brake fluids, reacts violently, producing a large fireball, with some household chemicals, notably pool care products.Fact|date=September 2007
[http://forums.hotwheelscollectors.com/groupee/forums/a/tpc/f/58110277/m/83810577 Hotwheelscollectors.com] cites that hobby modellers use brake fluid as a safe (if somewhat slow) paint stripper. It is less likely to harm skin and will not harm plastics(although silicone based fluids can distort the detail on plastic models). Brake fluid can also be used as a releasing fluid for screw threads, provided no painted parts are involved.
Diethylene glycol monoethyl ether
Diethylene glycol monomethyl ether
Dimethyl dipropylene glycol
Polyethylene glycol monobutyl ether
Polyethylene glycol monomethyl ether
Triethylene glycol monobutyl ether
Triethylene glycol monoethyl ether
Triethylene glycol monomethyl ether
* [http://www.carcare.org/Brakes/brake_fluid.shtml Car care council]
* [http://auto.howstuffworks.com/question451.htm "How Stuff Works: What are the different types of brake fluid?"]
* [http://www.stoptech.com/tech_info/wp_brakefluid_1a.shtml StopTech: Brake Fluid 1A]
* [http://www.fordf150.net/howto/bleedbrakes.php Brake Bleeding]
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Look at other dictionaries:
brake fluid — brake .fluid n [U] liquid used in certain kinds of brakes so that the different parts move smoothly … Dictionary of contemporary English
brake fluid — brake ,fluid noun uncount a thick liquid used in the brakes of some vehicles … Usage of the words and phrases in modern English
brake fluid — A special fluid used in hydraulic brake systems to stop or slow the vehicle. Never use something else in place of regular fluid. There are four types of brake fluid on the market. DOT 3, DOT 4, DOT 5, and DOT 5.1. Also see silicone brake fluid … Dictionary of automotive terms
brake fluid — noun : the liquid used in a hydraulic brake cylinder * * * ˈbrake fluid 7 [brake fluid] noun uncountable liquid used in ↑brakes to make the different parts move smoothly … Useful english dictionary
brake fluid — stabdžių skystis statusas T sritis chemija apibrėžtis Dažniausiai glikolių, alkoholių, eterių ar ricinos aliejaus ir antikorozinių priedų mišinys. atitikmenys: angl. brake fluid rus. тормозная жидкость … Chemijos terminų aiškinamasis žodynas
brake fluid — brake′ flu id n. aum the fluid used in a brake system to transmit pressure from the brake pedal to the pistons at each wheel … From formal English to slang
brake fluid — Auto. the fluid used in a brake system to transmit pressure from the brake pedal to the pistons at each wheel, producing the braking action. * * * … Universalium
brake fluid — /ˈbreɪk fluəd/ (say brayk floohuhd) noun a liquid used in a hydraulic brake system to transmit pressure … Australian English dictionary
brake fluid — noun (U) liquid used in certain kinds of brakes so that the different parts move smoothly … Longman dictionary of contemporary English
brake fluid — UK / US noun [uncountable] a thick liquid used in the brakes of some vehicles … English dictionary