BENDIX SD-13-4958 User's Manual
Contents
1. z a 8 Bendix M 40QR and M 40HF Pressure Modulator Valves Delivery Pet Bendix M 40R Modulator surely Port Sectes Connactor Bendix M 40HE Modulator Supply Por Elecrcal puma us Wishing Hl nick Mewrtegtilee esha Pat uso Tete age uaza fam anise aac Tires os a es DESCRIPTION The Bendix M AOQR ulck release and M AOHE high ow prssure modulate valves PMVs arshigh capact lonff aie valves that incorporate a pair of electrical sclenald for conv See Figure 1 The slenads provide the electro pneumatc interface between the vehicles slectonc contol system and the a brake systom For fxamila the PRI used to conta the bring function of service actuators during antock activity Tha madustr canis ofc cast atl and paste body that houses ane nermaly open soled one normaly ose solenoid and an ile and exhaust phragm valve A throe pn weatherressant lecical connector le an inepral part of tha rodulatar solenow assembly and salves tha vehicle conrller s commands tothe Modulator Two mounting hes are provided for tame or Passmember mounting ef te valve Ta Bandit M 4OQR maduatre the dec replacement for tha Bendix M A2OR maduatr See Figure 2 The Bendix M 400R madustorhas abi vate fo provi an Internal quick release uncon The supe delheryand eau ports onthe Bane M0 modulators have emtossed detifation code po2. applicaton Allow the pressure to stable fore mine 55 Bopin timing pressure loss for two minutes while etching he dash gauges fora pressure drop The eakage rat for he service reservs should rot ax ned fur 4 ps thin twomintas for a single vehi ix 6 ps whi wo mits fr a racecar end ght 8 pal witin wo mints fora tector with a rales 8 tfothercrastoxcesdsthe leakage values above pe soap soliionto the exhaust pot af the modulators and _ny ther components inthe respective cect 7 The leakage at the exhaust port of most Bend component including M 40 maduatrs shoud not excaeda one inch bubble thes seconds Meakage tne mackstor ie determined io exceed th maxanum Sits replace the modulator ELECTRICAL TESTS 1 Betore testing the solenoid assembly ofa suspect modulator i location on the vehicle should be onfmed using he raubleshoctng procedure for he specticantiock convaterin use Seothe Serves Data Sheet valabla on ww bend com documenta 2 Proceed to the modulator in question and inspect is ving connector Disconnect the connector and tat be esistance between he pins on the modulator Refer to Figure AL HOLD to SOURCE 41 42 2V systems Read 4 810 56 Ohms 24Vsystoms Read 13 90 16 3 Ohms 1B EXHAUST ro SOURCE 41 49 2V systoms Read 4810 56 Ohms 24Vsystoms Read 13 910 16 3 Ohms CI test the resistance ofeach pn to vohide ground and note thre NO cont Ifthe resistance readings are as
3. shown the wire ened leading athe modular may require epi ar replacement efor atlempting repo replacement of the wire harness refer to the test procedures psc for he antilock contr in usa for posse ther testing that may be requred to substatata the wire namessprobiom tthe resistance values are not 28 slated replace the modulate MODULATOR REMOVAL Local he modulator that wil be replaced and clan the exterior laentty and mark or label al si hoses and thee espectve cantons on the valve facilisi ease cfiatalation Disconnect bath alr nes and he electeal connect Remove the madulaor fromthe vehi Remove any ar hose iting present These fitings ill be re used in the replacement modulator MODULATOR INSTALLATION Install at previous removed a hose fitings making certain tread sealing material does nol eter the vale Reconnect both alr lines tothe valve using the gentincalon marks made during stop 5 of Modulator Removal Recannact he elctreal hams othe modulator Aternstalingthe val tetas tings orexceseve leakage and ighten as needed TECHNICAL INFORMATION Mode Modulator Type Supply Por om brake olay or uk release valve 12 NPT ett Delivery Pon Bake actuary Options PTE NPT 1 Pusorconnect for 1 2 tubing Solenoid Vat OC Nominal optional 2 Va Voltage valabe Weight 135 pounds Maximum 180 pal gauge HOF Gyo TS dares Fatenneit IA shorts operating tmperature et 230 10
4. C for upto 10 of he ales tina is acceptable Pressure Pressure 1 paimaximum upey io delvery Peeiee amar hrugh Holesizes_ 2 trough body Met 8 e 4 rn SJ rae Ser al A Terminal Terma Function wane Function FIGURED ENDO M 40OR AND W ORF MODULATORS DN SYMBOL GLOSSARY ATCIESP Lamp Alan thatndses whan aby ncn te educe vn sped ty eigen os Yo Yew Cone Helpers janis eile Log on and Learn from the Best ominevlng thats vata when you sre 247265
5. ORS OPERATIONAL MODES ANTILOCK APPLY MODE Ifa serie brake appctin Is made and the antilock system detects an impending wheel ockup he atlcck Contr wll make a coototed brake applation using the mada nordroconrl the bake application the cals of thetwo solenoid valves contains inthe modular era energized tr do enargaed in pre programmed sequence bythe fntlock controler When s solenoid cal is energzad land depersingon whetherthe exhaust oral solenoid Isenerazed tether opens or closes thereby causing the extaustorreapplcaton of air pressure to the brake factator Th solenoids i tha maduatr are controted Independenty by the Electronic Contral Unt ECU Before ABS systma divers would sometimes pump the brakes in order to aitemet to prevent whee lockup and maintain venice contzo Inthe case ofan ABS braking tom the anlock conta abe to apply are res the brakes using tbe modulators automaticaly wi far ater sped and accuracy Dependingon he number of Modulators wed some systoms ae able to apply braking wero whesis indepensenty ANTILOCK EXHAUST MODE Wen whee look is tect or imminent the antilock onzoller energizes the supply and exhaust solenoids in the modstor Further dover of art the brake chamber is provented tnd airs sllowed to exhaust thraugh the exhaust par ANTILOCK HOLD MODE The aniock conta wal place the modlatrin the ld postion when information ram the whee sped sensors rows that the corect wa
6. a speed baking force has been stained The antlock eosroer wal alo place the madulstr inthe held positon prior to entering the reapply made whan it detacts recovery fm a lacked whee cnetion In this mode of operation the exhaust passage i sealed holding the a pressure the rake chamber at that ove Atthe same Uma no appli as permitted to ow The modulator can anter both the antilock exhaust or reapely mad rom the artlock hod made depending on the needs othe antilock contra ANTILOCK REAPPLY MODE Ifthe antloc conallar senses that wheel spoed has lncressed suey enough to allow resapplcaion of braking pressure without further whee occupy parts the supply arto e apply alo the brakes inthe same manna td tute a nor atiock event PREVENTIVE MAINTENANCE GENERAL Read and follow the Ge page 2 ofthis document al Safety Guidelines on Perform the tests and inspections presented atthe rescred intervals the moduatrfals wo function as described ofthe leakage is excessive replace with Bend brand unt avalsbe at any authorzed parts let EVERY MONTH 10 000 MILES OR 1380 OPERATING HOURS 4 Remove any accumulated contaminates and visually Inepectne exterior forsxcsssvacoroson and pyses damage 2 Inspect aac hoses and wire harnesses connect io the modulator for Sgns of wear or pyscal damage Replace as necessary 2 Tea lie tings for lnakage and tighten or replace ae necessary 4 Performt
7. e temporarily disconnected fromthe radar sensor whenever any teats USING A DINAMOMETER are conducted on a Bendixe Wingman Advanced equlpped vehi You should consultthe vehicle manufacturer s operating and service manuals and any related erature Inconjunetion withthe Guldelines above ant ceca dniPoato aes atone cates i ho ie Sr TA no Bae FIGURE 4 TYPICAL SYSTEM DIAGRAM S 4i SYSTEM SHOWN PRESSURE MODULATOR VALVE PMV AND TRACTION CONTROL VALVE TCV CHUFF TEST Avieing hamess connects the vticle modulators othe Contollr Tha ABS conti ia able to smultanaousy land independent conto the invidual meduatrs Bend Eecronic Cont Unis CUS performa Benet patented PMV and TCV Chuff Test The Chl Tests fn electrical and poeumatic PMV tet that can assist mantenanceporsonneinveriyiog proper PAV wing and Insalition This tests performed only when the vic Iestationary fhe vice moves th Chuff Test wil not be performed NOTE ifthere are any active Diagnostic Trouble Codes 0TC8 the stp amp crss check porn afthe Chul Tat not be ead aut unt al OTC are hay daghosed and Coresponding repairs are successtuly conducted The EESPIATC dash inccatr lamp ATCIESP Lamp a lamp that inceates whan stably functions inudng acton cont ral stably rogram or ya con are epeating vil leo be iluminated when thera are active ABS ATC orESP Dis See the Glossary on page tor mare lnfa
8. ha routine OPERATION amp LEAKAGE TESTS describ bolo OPERATION amp LEAKAGE TESTS OPERATION TEST This tos uses the Chu Tost desced on page 3 To propery tst he functon ofthe motor wil require wo service technicians 1 atk the viele an level surface and look or chock the wheels Release the parking brakes and bul the air system to govemor cut out 2 Tum the engine ition kay ta th OFF poston then rake and ald ful rake application 3 With the brake application held and one 1 service technician posted atone 1 of he modulators tum the voice ignition ky tat ON postion ONE OR TWO SHORT bursts of air prssure shouldbe noted atthe modulator exhaust Repeat he test foreach mods on the vehicle f atleast a single burs of exhausts hot noted or the exhaust ofa prolonged and not short sharp and wal defined pertorm he Elatcal Tests LEAKAGE TEST 4 Park tha vice on yal urace an lock or chock the wheels Reloase the parking brakes and bul the i syste ofl prosaure 22 Tumtho ngine OFF andmake 4 or rake sppetions tnd note that the serie braket apply and rela prom 3 Buld system pressure to govemorcutautand um the engine OFF 4 After daterminng the pressure loss with the brakes relanced 2 peliminuta allowed make and hald a as aia ie nwo at Eee re e aes ul sence bake
9. no ca Hese Fanction a ea aren soo Feo Sew oe APPLICATIONS BencixM 40 mocdstrs may be used or varius purposes cna vehicle including ABS and stably inirventions In 2pplcatons using these PMVs an external quck release Valve may also be requrad depending an the system design Where the modulatoris used fer individual whee contol appcation its typically the last contol vale trough whieh ar passes ons wy to the service rake ctualoe See Figure 4 fora typical sytem schema GENERAL SAFETY GUIDELINES WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS A TO AVOID PERSONAL INJURY OR DEATH hen working on or around vehicle the following guidelines should be observed AT ALL TMES Park the vehicle on a level surface apply the parking brakes and always block the wheels Aiways wear personal protection equipment Stop the engine and remove the ignition key when working under or around the Vehicle When working in the engine compartment the engine should be shutoff and the ignition kay Should be removed Where circumstances eure thatthe engine be in operation EXTREME CAUTION should be used to prevent personal Injury resulting from contact with moving rotating leaking Heated or elecrcally charged Components a not attempt to Insta remove disassemble for assemble a component unl you have read nd thoroughly understand the recommended Procedures Use enly the proper tools and bserveal precauti
10. ons pertainingto use of those tools I the work s being performed on the vehice s alr brake system or ay aunllary pressurized alr Systems make certain to arin the from al eservols before beginning ANY work fon the vahice ithe vehicle fs equipped with Bendie ADS alr dryer system Bend DRM ervol module ora Bend AD 2 sure fe dra the purge reservoir Never exceed manufacturer s recommended pressures Never connect or disconnect a hose of line Containing pressure It may whip Never remove smpodent or plug unless you afe certan al System pressure has been depleted Use only genuine Bendix brand replacement parts companents and kits Replacement Rardware tubing hose StUngs etc must be of equivalent size type and strength as original fqulpment and be designed specifically forsuch Spplletions and systems Components with stripped threads or damaged parts should be replaced rater than repaired Bo not attempt repalrs requiring machining of welding unless specifically stated and approved By the Vehicle and component manufacturer Prior to returning the vehicle to service make Certain all components an systems are restored to thelr proper operating condition For veblcles with Automatic Traction Control ATC the ATC function must be slsabled ATC ndlestor amp should be ON prier to performing ny vehicle maintenance where ene or more ieets on a drive axle are ited off the ground nd moving The power MUST b
11. rmation on these fem See Figure 5 When ignton power is applied each modulator slenodis bay enerozed hear system is uly charged and he service brake pedals depressed dang ignition the modustor creates 2 single sharp edie chuff of ar pressure Bendix ECUS wl perform 3 PMV Ch Test on al insaed modustors nthe order shown a Figure 5 The pattern wl then repeat isa Right Right Drive Addins lg Ste ca e 0 ow 0 lt tansieer Gnome oat Aatinat 3 te Ae apa PY Vr equlpad with 2 Bendix EC 60 or later advanced como following the compsetion ofthe second round fPMV amp TCV Chiff Test the conta f congue to o so wl partrm a ts cross chock the aler PMV eperatin vith the vehicle stop lamps ifthe raer PMV reat ismis wed cluding the stoer ade TCV the PMV allexhaust large amount of ai none tl ANTILOCK OPERATION GENERAL See Figure 6 Their ourrowscfthis abe show normal ve braking where the PMV does not ntrvene In the case of 3 api non antlock rslease ofthe brakes ag he dvr releases te brakes after a severe brake appleation the Benelx M 40QR PMV assis the quick elase of the bakes by boing the pain at which he aris exhausted The final four ots ofthe table shaw the acon taken during an antiock braking event OPERATION Ho eanaast Mode Modulator Sojenoid Solenoid Description twee Ste Ste Noma IA pre
12. ssure supped i he modular exis Nomantiock HF anton Ov enerazss De eneazes nw mast deve por ard fows te Bake Apiaton seven ake chambers When fe dosed a restr lane n Non Antlock and OR De snerized De enemzed the sence brake chambers the a pessure ct in the system levels off fr ron a ake chars moves tack Norma fregh the mosutor inthe reese Nomantioc 4 ansoR oeenesed Deenergzed orion sowed ng spleson Becta tow Fort Ovens omer Srasay tata aw Sra Release every be expe ron be mosisor 7 Sau po Tre nals pon Hoos a Fone bine chamber fom moving bcs oigh ne Neransk OR Deeneazes Deere tr nto oe a bona haut Out ne medio ena po tea the diver rosie the ir rom a re chambers oes back brakes ater treugh the msuator in te reese Screreurae Deenersed Deena recton a 1 owed enn sppeston spptcaton Sirotneoun a wi be expe em te rns exe or Ar pressure supped i he modair oct Aniock App HF nd oR Beene Deere ne melt delve pr and tow oe 3 serves ke chambers B anitock Exhaust HF and oR Energized Enemized um the brake chambers exhausts i through the modulator exhaust port 3 The modulator prevents supply air trom 1 eee anion a eanaren ssn trough ine modus fd se AetlockHold HF andon Enamzad Desnerazod for me proves fem te ake cranes fom etm 3 anton Te madultor reappears in B amc e an crt ents eed ova mar bears ono FOURE G RENODe 00h AND MGaHF MODULAT
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