7/27/2019 Brake Fluid Tech - Speedway catalog.pdf

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The two rnost common bEke fuids usedn the autotrolve industry are fr!ds that

contaln polyalkylene q ycol ether and fuidthat coniains sill.one or si cum based

poymer Both fluids e common bLt verydifferent in reoards t. the manner in uh.hthey perform.i uids.ontaln n9 polyalkyleneglyco ether are nrore wdey lsed and arethe onlyfu ds that shou d be Lrsed n rac n9brak€ iy(ems. Be.ause brake syn€rns mayreach extreme temp€ratures brake fluidnrust have the abilily to wthnand th€selemperatures and not deqrade iap dly.

SILICONE.BASED FLUID

FlLds conta ning s kon€ are geneEllyus€d in m taryrype veh des and, becauses kone-bdedf u dswillnotdamag€ pa nted

rfaces, they e a io som€what .ommon inshow.a6 Siicone basedf uidsareregardedn DoI5 f uids.They ehghy.ompreslbleand can glv€ the drv€r a fee ng of a

sponqy peda. The hlqher ihe bGke systemtemperature th€ more the .ompresilbi tyof the fu d Th s in.reases the f€e nq ofa sponqy peda. Sili.on€ based fllds are

non hydroscopic mean f9 thatthey w fotabsorb or m x with water. When water is

present n rhe brake system t w o€ate a

waterifl! d situation. Be.arre waler bo s

at approx matey 212"1 the abi ty of thebmke synem to opent€ corcctydeoedei,and the neam created frorn bo ng wateradds air to the syst€m. i s lmportani to

.emember that wat€l may b€ present lnany bEke syn€m.5iicone bGke fuid ackthe ability to dea wth this moisrure and

w dramaticaLly deo€d€ a bake synem!

POLYGLYCOL ETHER.BASED FLUIDS

F uids .onta nlng poyg ycol ether are

reqarded a5 DOT 3, 4, and DOT 5.1 These

types of f uids are hydroscop c, meaninq thatthey have an abilily to nr x wth wat€r andsti perform adeqLatey However,waterwidrani.a y redl.e the boiinq point of thefu d. n a pasenger.ar ths is fot an $ue.n a Ece car t is a malor iss!€, b€.ause d

the boilinq po ntde.r€as€s, the performanceof lhe f! d also d€crease5. Po yq ycol typefluids are two t mes e$ .ompre$ ble thans con.. typ€ fl! ds, even when heated. Lesconrpr€srlbi tyofthebmkef uidw in(ed€peda fee. Chang n9 fluid on a regu ar bassw lqr."atly increas€ the performaice ofthebEke system. All bmke flulds irLrst meetfedera nandard {l l6 Three Departm€nt afT6nspodation (DOT) min ma specifi.atioijfor brake fluld are defn€d in this stand d.

They e DOT3, DOT4, and DOTs I (forilulds

based with poyakyene qlyco ether) andDOT 5 (for rllkone based f uidt

^llNlMAL

bo I n9 po nts forspe.ll.ai ons are as follo!!s:

system is a result of water that has tlrneto steam. The b! dup of steam w creatalr pre$ure n the rynem, someumes tthe point that enough pr-p$ure i creare

to push .aliper pistons iito the brake pad

This w (-"ate brake draS as the rotor anpads make conta.t aid can also creatmore heat n the synem. Another way thamosture may enter the synem k throlghdffuson. Diffuson o.cuB wh€n mostureniets through rubber brake hos€s. Us nhoses made from EPD^4 materiah iEth enePropyl€ne-Di€ne-[4ateials) OR itee braidebrake hose with a nonjubber s eeve (rs!aTefon) w qreatly redu.e the diffrslon

THINGS TO NEMEMBER.A

blake fuid's dry bollng poift B mormpo a.t than wet boiing point wheu5ed ln a Gc nq blake5ystem.

.Racing brake system fuld shoud bchanqed often.A system wth fr€sh fuiwi have a ower moisture content antherefore p€rfornr ben.

. Never use rllkone bas€d fl! ds in racli

. Ne!€r r€use fuid. Never mlx typ€s obrands of brake fl! d.

.Plrge the synem kompiet€y dGnand replace the brake fuid often fomaxlmum pe{ormance.

8o ngWet Bo ng Dry

DOT 3

DOT4

DOT 5 500.F

DOT5,1 518"F

HTX600+

DoT 3 VS. OOT 4 and 5.1AFCO! HTX bEke f ! d dra matka y ex.e€dsall DOT 3,4, a.d 5.1 standards for wei and

dry bo n9 polnts, lubri.ation, cotrosionprotect on, and v roslty specin.aions.

WET VS. DNY BOILING POINT

Theterir bo ns polit,when used reqard nqbckef uid, means thet€mperatures arwhichbnkefuid w beg ntoboil.

WET BOILING POINT

Th€ minimLm temperatures at whi.h brakefluds w begln to bo when the brakesystem contains 30.6 water by volume of the

DRY BOILING POINT

The t€mp€Etlr€s at wh ch bGke fu d wittboillvlth nowaterpresent n the system.

MOISTURE IN THE BRAKE SYSTEM

Waler/nonure can be found in neaiy all

brake 5yst€ms. Moistlre enters the brakesy(em in several ways One of the mor€common ways 5 irom using od or pre

opened fu d. Keep n m nd that brake fuiddraw! n moisture from the surrornding air.

TqhtLy sealinq brake fuid bottes and notstor nq them for ong p€rods of ume wl

he p k€ep moisture out. When chang n9or bleeding bnke fluid, always replacemaster cylnder caps d soon as po$lble toprevent nro stur€ fronr enterifg the system.

Condensallon Gmall moistur€ drop eh).anform n lines and calipers.Asca lp€r and linetemperatures heat Lp and cool repeatedt.oodeniauon forms, leavnq behnd anin@de n moisture/water Over time. themoisture becomes trapped in the ntemasectons of calipers, lnes,m t€r cylind€ts,etc.When thiswater reaches 212.1th€ waterturns to n€am. Nlany tlmer, air ln th€ brake

136 w ww. Sp e e dw dyM ot o tt,