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REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400

1. Product of Arex Test Systems bv Gansoord 7a 2165 BA Lisserbroek Holland Tel 31 0 252 419151 Fax 31 0 252 420510 E mail info arex nl Notice The contents of this manual are subject to change without notice All efforts have been made to ensure the accuracy of this manual However should any errors be detected AREX would greatly appreciate being informed of them The above not withstanding AREX cannot assume any responsibility for any errors in this manual or their conseguences Lisserbroek Aug 8th 2001 Software version 5 00 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 mal h k h ak to bo to bo bw ROD mal kh h h h EEEN NANEN 2 1 2 1 1 2 1 2 2 2 2 3 2 4 2 5 2 5 1 2 5 2 2 5 3 2 5 4 2 5 5 2 5 6 2 5 7 2 5 8 2 5 9 w w w w v4 k INTRODUCTION Description of the AREX Test Lane The Arex Computer The Modules The Brake Analyser The Side Slip Meter The Weighing Scales The Suspension Analyser The GC1700 and GC2002 accessories The infra red remote control RC1200 The printers PR3010 Inkjet printer PR3015 Laser printer OPERATING THE SYSTEM Operating the computer Operation with the hand held remote control Operation with the alphanumeric keyboard The information on the screen The programme s structure The daily start The main menu The reviewing of
2. Rolling resistance 3 6 7 ABS System An ABS system that functions properly will show a pattern similar to the one below The exact shape and number of pulses heavily depend on the type of system Bear in mind that ABS systems only kick in at a speed over some 10 km h and does need the application of brakes on the connection plates plain surface to create a skid ABS REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 6 8 Braking distance table Speed Deceleration km h 25 30 135 40 45 150 55 60 65 70 175 80 85 90 50 39 133 28 125 22 20 118 16 15 14 113 12 12 11 70 77 64 55 48 43 39 35 32 30 28 26 24 23 21 90 127 106 91 80 71 64 58 53 49 46 42 40 38 35 Braking distance in meters REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 ar S CHAPTER 4 THE SUSPENSION ANALYSER This chapter describes how to perform a suspension test on the Arex Suspension Analyser A suspension test can be a separate test or part of a combined automatic test e g with a brake test and or side slip test The actual suspension test procedure in both situations is the same 4 1 The suspension test The suspension test can be carried out automatically or manually 4 1 1 desc
3. CUSTOMI SING 1 CUSTOMISE MODE 2 CUSTOMISE AUTOMATIC E EXIT 2001 01 26 10 10 29 PLEASE SELECT 8 2 1 Select and customise mode Key 1 enables you to select one out of four different modes and to change the 4 modes to your own specifications All tests will then be carried out in accordance with the specifications you have stored The screen as shown below appears CUSTOMISE MODE DECEL SERVICE BRAKE DECEL PARKING BRAKE PEDALFORCE LIMIT SIDE SLIP LIMIT WITH SIDE SLIP WITH WEIGHING WITH PRINTING WEIGH FRONT AXLE FIRST PARKING BRAKE ON AXLE FAIR ADHESION GREEN SUSPENSION GRAPH 1 4 C CHANGE 9 PRINT E CONT Selection of 1 2 3 or 4 corresponds to Mode 1 2 3 or 4 By pressing one of these keys you can select the mode to be changed The mode chosen is boxed Select C to actually change the mode already set Step by step we will describe how to set the mode according to Boxed Mode number 1 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 Successively you are now asked to input certain values Every value is to be confirmed by pushing E Where you wish to change an existing line but not all values pressing E will leave existing values already set Deceleration service brake Deceleration parking brake Side slip limit With side slip With weighing With printing Wei
4. F1 Help F3 Select Mode F8 Clear fields Enter Confirm t 4 Change field ESC Menu To retrieve the test results of this licence number press F3 and the results as shown below appear You can step through the tests in sequence of license number by using keys arrow left and arrow right When you press Enter in this screen the results are read into memory and you can see and print them in the results menu READING TESTDATA Check side slip Date T ime 1998 01 29 14 45 16 Customername Damme J C v Licence nr FD FD 34 Chassis 1 AC34523 4356 Make Car model Year of man Mileage Technician Hopper D Last test 19970914 Help Enter Select Data Del Delete Data Change record ESC Enter SearchData REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 69
5. This is expressed as a percentage of the higher of the two on that particular axle In the example shown the front the difference is 35 The rear axle difference is 11 3 3 1 3 The brake force ratio front to rear In the example shown 84 of the total brake force was measured on the front axle and 16 of the total brake force on the rear axle N B On a 2 plate version the results of front and rear axle are shown in one screen Note that the two axles were not tested at the same time and therefore The graphs should not be compared to each other especially not with regard to synchronisation problems The brake force ratio front to rear may not be correct because of the possible difference in pedal force applied 3 3 1 4 The weight The weight if measured or entered manually in this example is 1125 kg 3 3 1 5 The front axle side slip The side slip on the front axle in the example shown is 8 m km 3 3 2 Reviewing the parking brake result screen Key 4 This screen shows the parking brakes maximum deceleration brake efficiency achieved provided the weight is known either measured or entered manually The left hand side shows the graphs the right hand side the values REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 Are 1 LEFT HEIGHT kg 1125 18 9 PRINT E CONTINUE The parking brake deceleration is shown in red because it do
6. 8425N 28 8415N 37 7105N 0 2125N 0 ON 0 ON 0 ON 0 ON 0 ON Selecting 9 gives a black white print of the screen 3 5 Interpretation of test results In order to correctly interpret the test results we distinguish between values paragraph 3 5 1 and graphs paragraph 3 5 2 and 3 6 3 5 1 Interpretation of values The following values are important 1 Brake force 2 Deceleration Brake efficiency 3 Difference left and right per axle 4 Brake force Ratio front to rear REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 26 Some of these values have to meet legal requirements set by the government bodies car manufacturers or the workshop itself Some of the requirements are pre programmed during installation Some requirements can be adapted customised We refer you to Chapter 8 Where applicable the Arex Brake Analyser compares the actual values measured with the requirements set Should the values measured not meet the requirements the results are shown in red 3 5 1 1 The brake force The Arex Brake Analyser measures the forces that the wheels exert on the brake plates while the vehicle is braking Each individual brake force shown is taken at the point during the test where the total brake force on the axle is the maximum The total brake force of the service brake is the sum of all the four brake forces at the point where the total
7. PLEASE SELECT R y selecting 3 SUSPENSION from this menu the adhesion test results appear on the screen Select 0 RESULTS from the Suspension Analyser Menu The adhesion test results appear on the screen REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 In the suspension result screen you can press key 5 to see the graph of the whole frequency area We call this EUSAMA graph 4 2 1 Printing the suspension adhesion test results The result screen shown in the previous paragraphs can be printed in three different ways 1 Selecting 7 gives a full colour print of the screen as shown 2 Selecting 8 gives the results of the test shown in tabular form It shows the dynamic road adhesion at each frequency 0 25 Hz 3 Selecting 9 gives a black white print of the screen 4 3 Interpreting the suspension test results In order to interpret the suspension test results correctly it is vital to understand the Arex Suspension Analysers working principle The Arex Suspension Analyser measures the vehicles road adhesion It is important to note that not just the shock absorbers are tested but the complete vehicles suspension system This means that any effect like aluminium rims wider tyres or a lowered body are included in the test The Arex Suspension Analyser measures the minimum dynamic road adhesion within the frequency range of 0 25 Hz expressed
8. Side Slip Meter Suspension Analyser Brake Analyser B Suspension Analyser Brake Analyser Side Slip Meter C Brake Analyser Side Slip Meter Suspension Analyser D Brake Analyser Side Slip Meter Suspension Analyser REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 52 gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt ar S Slowly drive the front axle over the sideslip meter onto the suspension analyser Suspension test front axle Slowly drive the rear axle over the sideslip meter onto the suspension analyser Suspension test rear axle Drive the vehicle of the suspension analyser and place the vehicle in front of and in line with the brake plates Service brake test Parking brake test Slowly drive the front axle onto the suspension analyser Suspension test front axle Slowly drive the rear axle onto the suspension analyser Suspension test rear axle Drive the vehicle of the suspension analyser and place the vehicle in front of and in line with the brake plates Service brake test and sideslip test front axle Parking brake test Place the vehicle in front of and in line with the brake plates Service brake test and sideslip t
9. the results The automatic mode The brake system programme The suspension programme The side slip programme The weighing programme The customer data programme The date time programme The customise programme THE BRAKE ANALYSER A brake test one 2 plate version The automatic brake test on a 2 plate version Taking the vehicle weight during the brake test The manual brake test on a 2 plate version REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 2 3 2 1 3 2 2 3 2 3 3 3 3 3 1 3 3 1 1 3 3 1 2 3 3 1 3 3 3 1 4 3 3 1 5 3 3 2 3 3 3 3 3 3 1 3 3 4 3 4 A brake test on a 4 plate version The automatic brake test on a 4 plate version Taking the vehicle weight during the brake test The manual brake test The brake test results Reviewing the service brake test result screen The maximum brake force for each individual wheel The difference between left and right per axle The brake force ratio front to rear The weight The front axle side slip Reviewing the parking brake result screen Reviewing of the brake results screen Calculation with the brake force Reviewing the rolling resistance Printing the brake test results Interpretation of test results Interpretation of values The brake force The deceleration rate brake efficiency The difference in brake force Brake force distribution front to rear The interpretation of graphs Testing 4 X 4 ve
10. 15 we refer to the separate user manual delivered with the printer REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 2 OPERATING THE SYSTEM The Arex computer can operate a variety of modules These modules can be used as stand alone or in combination with each other For example one can have a stand alone Brake Analyser but also a combined Brake Analyser Side Slip Meter and Suspension Analyser Despite the many possible variations the system is very easy to operate and enables you to carry out a fully automatic test of brakes suspension and side slip without touching one single button However there are times when you will need to input information or respond to option commands Yes No etc This then will require you to push a button The options requests and commands are always shown on the screen to simplify the operation The remainder of this chapter describes the operation of the system 2 1 Operating the computer The Arex computer can be operated by The numeric keyboard on the hand held remote control The alphanumeric keyboard in the drawer 2 1 1 Operation with the hand held remote control The numeric keyboard consists of 12 keys the 10 digits 0 9 a clear key C and an enter key E The function of each of these keys is shown on the screen when any action is required Some keys have a universal function throughout the whole programme E
11. 1900 TECHNICIAN Hopper D LAST TEST 19970914 Shift TAB Next Previous field t Home End Move cursor in field F10 Clear field ESC EXIT Now all information is entered It will appear in the header of the results printout It will also appear on the SAVING SCREEN as described in 11 4 11 3 How to work with the database program If you want to store the test results from a vehicle on your computer you have to follow the next steps e Before starting the test enter de data into the customer data screen according to the guidelines described in 11 2 1 Please note e Storing of the test results is only possible if you start the test sequence from an automatic mode e At the moment you start the automatic test sequence all the test results from previous tests are deleted from memory REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 e Select 1 of the 4 automatic test sequences e Start the automatic test sequence you have selected e If the test results or part of it are not satisfactory you can switch to the manual mode and do the test again E g the service brake test Please note e The date and time you started the automatic test sequence will be recorded and can be used as a key to retrieve the results from the database The next paragraph will show you how to store the test results before you start a new test 11 4 H
12. 5 WEIGHT 615 k 510 kg TOTAL 1125 ky WHEEL WEIGHT 260kg 250kg REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 37 gt After completion of the test the system automatically reverts to the beginning of the suspension test or in case of a combined automatic test it automatically switches to the selected next test sequence Pressing E takes you out of the automatic mode and returns you to the Main Menu 4 1 2 The manual suspension test By choosing 3 SUSPENSION from the Main Menu the Suspension Test Menu appears on the screen A manual suspension test can be started from this menu For the actual procedure of a manual suspension test we refer you to the above described automatic procedure The only difference is that you have to select manually and switch from front axle test to rear axle test 4 2 The Suspension Adhesion Test Results After completion of a suspension test the results can be called back onto the screen The results of a test remain in the computers memory until the next suspension test is started There are two ways to call the results back onto the screen 1 Select 0 RESULTS from the Main Menu The Results menu appears RESULTS 0 TOTAL MOTORCYCLE 2 BRAKE SYSTEM 8 SAVING 3 SUSPENSION 9 READING 5 SIDE SLIP C CLEAR 6 WEIGHING E EXIT U 4 13 AX 2001701726 09 56 04
13. AR 3 8x 8 9 PRINT E CONT An adhesion area calculation has been added to the graph This adhesion area is a percentage of the total graph A higher percentage indicates better adhesion This method is used by various institutions throughout Europe The drawback of this method is that whilst it gives a correct indication of vehicles road adhesion it does not take the vehicles own unique characteristics into account There is however a clear difference between heavy rear wheel driven vehicles and light front wheel driven vehicles In order to improve the diagnosis the Arex Suspension Analyser also uses another method 4 3 2 The AREX Method The AREX method also uses the minimum road adhesion percentage but instead of relating it to the EUSAMA table it is related to two reference bars one for each axle These two reference bars are based upon the vehicles specific sprung and unsprung mass ratio This gives every single axle of every single vehicle its own criterion to determine whether the road adhesion is sufficient or not On the screen the reference bars are shown on the left of the minimum road adhesion bar diagrams See example below REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 ii FRONT REAR L R L R ACTUAL 637 76 317 DIFF WEIGHT 250kg WHEEL WEIGHT 260kg The diagrams can be interpreted as follows 1 If the b
14. BOTH AXLES 4 ONE OR MORE AXLES E EXIT U 4 13 AX 2001 01 26 10 08 15 PLEASE SELECT REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 6 1 3 Reviewing the Weighing Results Key 0 will recall the last weighing results back on the screen 6 1 4 Weighing the front axle Key 1 enables you to do the weighing of the front axle only 6 1 5 Weighing of the rear axle Key 2 enables you to do the weighing of the rear axle only 6 1 6 Weighing of both axles Key 3 enables you to do weighing of a two axle vehicle in one run The results are displayed per wheel per axle and in total By pushing E before taking the weight the system allows you to enter the weight manually without actually weighing the vehicle This is very useful when there are not weighing scales installed 6 1 7 Selecting one or more axles Key 4 enables you to enter the number of axles you want to weigh The maximum amount of axles is 9 It is intended for vehicles with one e g some small trailers or more e g some three axle vans axles 6 2 Printing the weighing results The result screen shown in the previous paragraphs can be printed in two different ways 1 Pressing 7 gives a full colour print of the screen 2 Pressing 9 gives a black white print of the screen 3 Pressing 8 if one or more axles are selected gives a numerical printout of all wheel weights REFE
15. BRAKE ROLLING RESISTANCE TESTREPORT SUSPENSION TEST WEIGHING TOTAL RESULT TYPE NUMERICAL VALUE The desired test sequence is 1 Weighing of the vehicle 2 Conduct a Service brake test 3 Conduct a Parking brake test 4 Receive a Test report Now you have to enter a sequence number for the Service Brake Press 2 followed by E Now you have to enter a sequence number for the Parking Brake Press 3 followed by E Because the Rolling resistance test is not a part of this test sequence you do not enter a Sequence number but simply press E and the computer will skip the rolling resistance test Now you have to enter a sequence number for the Test report Press 4 followed by E Because the Suspension test is not a part of this test sequence you do not enter a sequence number but simply press E and the computer will skip the suspension test Now you have to enter a sequence number for Weighing Press 1 followed by E Because the Total Results screen in not a part of this test sequence you do not enter a sequence number but simply press E and the computer will skip the Total results screen REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 At this moment the complete test sequence has been set Press E and the next screen will appear CUSTOMISE AUTOMATIC TESTS 2 SERVICE BRAKE PARKING BRAKE ROLLING RESISTANCE TESTREPORT SUSPENSION TEST WEIGHING TO
16. ERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 LEFT RIGHT DIFF CN CN C L R 7 N SS PNP 4250 2770 l 710 635 11 R HEIGHT SIDE SLIP RATIO BN kg m km C F R 1 1125 8 84 16 18 9 PRINT E CONTINUE The above problem does not occur when testing the sideslip whilst driving up for the suspension test as the speed should already be low and the steering wheel can easily be left in a neutral position In a combined side slip suspension test the sideslip results are shown on a separate screen See below SIDE SLIP FRONT Yu g 1 2 3 4 5 6 8 9 GOOD CHECK 2 9 PRINT E CONTINUE 5 1 2 The manual side slip test By selecting 5 SIDE SLIP from the Main Menu the Sideslip Menu appears on the screen The manual sideslip test can be started from this menu The actual procedure is described in 5 1 a REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 SIDE SLIP ANALYSER 0 SIDE SLIP RESULTS 1 FRONT AXLE 2 REAR AXLE 3 SIDE SLIP 2001 01 26 10 07 40 PLEASE SELECT 5 1 3 Reviewing the results Key 0 brings the results of the last test carried out back onto the screen First the front axle results and then after pressing E the rear axle result 5 1 4 Front axle test Key 1 is to carry out a separate front axle sideslip test This manu
17. OOO OOOO KOKO IK KD OOOO OOOO OOOO OK CORO ana SI OOK OKO OK IORI DODO OOOO OOOO OOK KOK KK RD KK KKN Sea ana aa BP2501 XXX SOSSON 9 9 NN ANN NN NAN OOOO OOOO IIA KK OKO ICRI KID SNN NN SOCIO IRI BOI IIR ANN NAN NN o o o co2521 gt DP2504 SM2520 DP2504 SM2520 DOKI C 828S 9 y NN NAN NN SENAR KAKAK SRK KKK RK RRR RIK RR EK RID SOO ICN ON KKN KK KK KKR IORI QCOQOOO OOOO OOO OR KOKO KOKO G CAA BP2501 99 SANINNNNNNNANNNNANNANANNANANNANNANANAN NN OUI RIK ND ICAI CICIR CCCII C9IR C9IR IIIN IRR RII DKK KKN RRR DOB OOO KK KKNI SOOOOOO OOS SNN SOOO 9 OOO asatettatatatetcetatateetatateetatateetatateetetateteetateteetatate KKN DKK OX 9 SSOR IAIA ONANAN OIII OOM OOOO OO CK KCK KIKI COOKOOO OOOO OOOO OOOO CK KCK KAI IK OOOOOOOOOC OOOO COCO OOK OK OKC IKI BODOOOO OOOO OOOO OOK KKK IORI DOK OOOO OOO KOKO RD SNN anna anna BP2501 o o KKN ANK C02521 OOOO OOK OK KCK KKK OK IONIC o o BP2501 XXX NAN Nan CACICA CCIAA COSS CINNA NN NAN SOCIO RR BOOK RII RI DNAN KAKAK PAN o o o C02521 b o RA2501 o o RA2501 o o RA2501 o o RA2501 o 460 X 62 CM 460 X 62 CM 4PSW 484 X 62 CM 484 X 62 CM N N N N v 572572 90 X 57 CM 90 X 57 CM REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 51 ar S 7 1 1 The 2 plate Brake Analyser wi
18. REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 6 THE WEIGHING SCALES This chapter describes how to use the weighing scales to determine the vehicles weight It is possible to measure the weight during a separate test as well as during a combined automatic test e g with a brake test and or side slip test The actual weighing procedure in both situations is the same The vehicle weight is particularly important to calculate the correct deceleration brake efficiency NOTE Where your system is installed with a Suspension Analyser this can also be used as a weighing device All references in this chapter to weigh scales should be taken to mean weigh scales and or Suspension Analyser 6 1 Weighing a vehicle The most reliable weight readings are obtained if the vehicle is driven over the weigh scales slowly and in a straight line Too high speed will cause the wheels to pounce or fly over the weigh scales which leads to incorrect readings 6 1 1 The automatic weighing test The automatic weighing test can be carried out in two ways 1 As part of a brake test before during or after the test see paragraph 8 1 2 2 During the suspension test Also see paragraph 8 1 1 6 1 2 The manual weighing test By selecting 6 WEIGHING from the Main Menu the Weighing Menu appears on the WEIGHING 0 WEIGHING RESULTS 1 FRONT AXLE 2 REAR AXLE 3
19. RENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 7 THE COMBINED AUTOMATIC TEST In chapters 3 6 the Brake Analyser Suspension Analyser Side Slip Meter and Weighing Scales were described One of the options offered by the Arex system is that the various modules can be operated in a combined automatic sequence The system automatically switches from one module to the other without any action from the operator On the completion of such a combined automatic sequence the system automatically switches back to the beginning of the sequence and is ready to test the next vehicle As the modules can be installed in a variety of combinations there are a number of different automatic test sequences These sequences are pre programmed during installation But can be customised by the operator e g with without printing For this we refer you to Chapter 8 FRONT AXLE READY FOR SUSPENSION TEST r aragraph 7 1 describes a number of common combined automatic test sequences The automatic test will always start with the Arex logo and after 5 seconds will instruct you in the lower part what to do depending on the test sequence you have selected REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 7 1 Combined Automatic Test Seguences We can distinguish three combinations 1 2 plate Brake Anal
20. TAL RESULT C CHANGE E CONTINUE To store the sequence in the computer press E again In accordance with the above you can now set the other 3 test boxes to your specifications Note Where you wish to change an existing line but not all values note the readings before proceeding as E will zero all lines in the automatic selected The settings of the 4 different boxes will be stored on the your computer REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 61 ar S CHAPTER 9 CUSTOMER DATA 9 1 Entering Customer data The Customer Data Menu involves the use of the alphanumeric keyboard With this menu you can enter the Technician s name Customer name Vehicle data and the last test date into the header of the Results Print out CUSTOMER DATA CUSTOMER NAME LICENCE NUMBER CHASSIS CAR MAKE MODEL YEAR OF MANUFACTURE MILEAGE TECHNICIAN LAST TEST Shift TAB Next Previous field t Home End Move cursor in field F10 Clear field ESC EXIT The entry screen is selected from the Main Menu with key 7 and looks as follows For the technician name you have 20 positions For the customer name you have 20 positions For the car type you have 20 positions For the licence number you have 20 positions For year of manufacture you have 8 positions For the mileage you have 8 positions For the last test you have 8 posi
21. Test Report 1 4 C CHANGE 9 PRINT E CONT REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CUSTOMISE AUTOMATIC TESTS SERVICE BRAKE PARKING BRAKE 2 ROLLING RESISTANCE TESTREPORT Automatic Test 3 4 Sequence Box 3 1 Service Brake SUSPENSION TEST 3 1 2 Parking Brake TOTAL RESULT 4 4 amp WN rs WN 1 4 C CHANGE 9 PRINT E CONT CUSTOMISE AUTOMATIC TESTS SERVICE BRAKE PARKING BRAKE 2 ROLLING RESISTANCE TESTREPORT Automatic Test 3 4 Seguence Box 4 1 Suspension Test SUSPENSION TEST 3 2 Service Brake TOTAL RESULT 4 4 3 Parking Brake 4 Total results 2 WN rs WN 1 4 C CHANGE 9 PRINT E CONT Selection of 1 2 3 or 4 corresponds to the automatic sequence mode 1 2 3 or 4 By pressing one of these keys that automatic test sequence is boxed Once the mode is boxed the test sequence in that box can be changed or set Step by step we will describe how to set the test sequence according to Automatic Test Sequence Box 2 Press 2 and the automatic test sequence is shown as boxed Press C to actually set or change that automatic test sequence The screen as shown on next page appears REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 59 CUSTOMISE AUTOMATIC TESTS 1 SERVICE BRAKE PARKING
22. XCEPT when a menu is being shown on the screen Key 7 print results as shown on the screen in full colour Key 8 print results of the test shown in a summarised tabular form Key 9 print results as shown on the screen in black and white Key C repeat cancel change Key E enter confirm exit Should the computer not respond to your given command you should check the following The receiver is covered with dust dirt The transmitter is covered with dust dirt Attempting to operate through a dirty windscreen The battery needs replacing REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 10 ar S 2 1 2 Operation with the alphanumeric keyboard The alphanumeric keyboard from de PC based computer serves two purposes 1 Operation of the computer similar to the numeric keyboard described above Key 0 9 C and E have the same functions 2 Entering Customer Data into the header for the results printout For these specific uses of the alphanumeric keyboard we refer you to Chapter 9 2 2 The information on the screen The Arex Test Lane is very easy to operate because the screen clearly instructs the operator on what action to take This information is presented on the screen as a menu or as a text in the top or lower box of the screen The screen can be divided into three main parts the top box the middle box the lower box In g
23. al sideslip test is particularly useful where the sideslip test during automatic brake test was not carried out correctly After completion of the complete automatic test you can manually choose to do the front axle sideslip test again By doing so you overwrite the results of the original sideslip test The other results remain unchanged 5 1 5 Rear axle test Key 2 is to carry out a separate rear axle sideslip test The rear axle sideslip is normally not tested during the automatic brake test 5 1 6 Sideslip With key 3 you can do a front and rear axle test However the results are not stored and therefore not a part of a complete vehicle analysis 5 2 The Side Slip Results After completion of a sideslip test the results can be called back onto the screen The results of the test remain in the computers memory until the next sideslip test is started There are two ways to call the results back onto the screen REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 1 Select 0 RESULTS from the Main Menu The results menu appears By selecting 5 SIDE SLIP from this menu the sideslip test results appear on the screen 2 Select 0 RESULTS from the sideslip menu The sideslip results appear on the screen 5 2 1 Printing the side slip results The result screen shown in the previous paragraph can be printed in two different ways 1 Selecting 7 gives a full colour
24. am and from the Side Slip Menu selected you can choose a separate test e g front axle test See Chapter 5 2 5 6 The weighing program Key 6 enables you to select the Weighing program In this program you can enter the vehicles weight when there are not weighing scales installed When weighing scales are installed it also enables you to drive over the weighing scale to measure the vehicle weight See chapter 6 2 5 7 The customer data program Key 7 enables you to put customer data into the header of a result printout REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 14 ar S 2 5 8 The date time program Key 9 enables you to change the date time This function is only required in the event that the season is switching from summer time to winter time and vice versa 2 5 9 The customise program Key C enables you to customise the system to suit you own particular requirements From the Customising Menu you can make a further choice e g change the automatic test sequence REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 15 CHAPTER 3 THE BRAKE ANALYSER This chapter describes how to perform a brake test on the Arex Brake Analyser A brake test can be a separate test or part of a combined automatic test e g with a suspension test and or side slip test where installed The actual brake test proced
25. an change the contents and order of the Automatic test For this we kindly refer you to Chapter 8 3 2 2 Taking the vehicle weight during the 4 plate brake test This procedure is the same as with a 2 Plate version We kindly refer you to 3 1 1 1 and Chapter 6 3 2 3 The manual brake test By choosing 2 BRAKE SYSTEM from the Main Menu you can carry out various brake tests independently These are shown in the Brake Test Menu AREX BRAKE ANALYSER 0 BRAKE RESULTS 3 SERVICE BRAKE 4 PARKING BRAKE 5 ROLLING RESISTANCE 9 HELP E EXIT U 4 13 AX 2001 01 26 09 54 30 PLEASE SELECT REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 The actual procedure for the service and parking brake test is detailed in the paragraphs above The only difference when compared to an automatic test is the fact you now need to switch manually from one test to the other rather than having an automatic test sequence The manual brake test is particularly useful where one specific part of the automatic brake test was not carried out correctly For example during the service brake part of the automatic test you may have already braked before the wheels reached the friction surface After completion of the fully automatic test you can manually choose to do the service brake test again By doing so you overwrite the result of the original test The other results parking brake test re
26. aphical presentation of the brake force development during the test The horizontal axis represents time the vertical axis corresponds to brake force The graph is formed by a long sequence of measured values based on approximately 700 measurements per wheel per test Each measured brake is represented by a curve with a unique colour corresponding to the colours shown in the right hand side of the screen The colours are axle left right service brake front blue purple service brake rear orange yellow parking brake front or rear blue orange purple yellow REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 The shape of the curves is partly determined by the way the brake pedal was applied If the curves are narrow and have a sharp peak the brake pedal was pressed too abruptly The curves should be wide and not rise too sharply A correct brake test at a speed of 10 km h 5 6 mph with gradually increasing pedal force will lead to a good graph When the brake test is carried out correctly the brake force graphs will contain detailed information on the functioning of the brakes 3 5 2 1 Testing 4 x 4 vehicles In order to test a 4 x 4 vehicle follow exactly the same procedure as with normal vehicles 3 5 2 2 Testing the ABS function Unlike most other types of test equipment the Arex Brake Analyser visualises the ABS function and allows the testing of 4 x 4 vehi
27. ar diagram representing the minimum road adhesion is above the upper line in the reference bar it is shown in green and road adhesion is GOOD 2 If the bar diagram representing the minimum road adhesion is between the two lines in the reference bar it is shown in yellow and the road adhesion is FAIR 3 If the bar diagram representing the minimum road adhesion is below the dotted line in the reference bar it is shown in yellow and road adhesion is POOR Where road adhesion is shown as FAIR or POOR it is recommended that you carry out a visual inspection before proposing to change shock absorbers A FAIR or POOR road adhesion result may be caused by other reasons than just the shock absorber REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 5 THE SIDE SLIP METER This chapter describes how to perform a sideslip meter test on the Arex Side Slip Meter A sideslip test can be a separate test as well as a part of a combined automatic test e g with a brake test and or suspension test The actual sideslip test procedure in both situations is the same In a combination system the Side Slip Meter can be installed at various places The most common ones are 1 In front of the Suspension Analyser 2 Between the brake plates 4 plate system 3 In front of the brake plates 2 plate system 4 Standalone see SS1500 manual In situation 1 the sideslip can be m
28. arantee that a brake system meets all safety requirements If the brake forces of the left wheel and the right wheel on the same axle especially the front axle differ too much the vehicle will pull to one side while braking After each brake test the Arex Brake Analyser gives the difference between the maximum brake force measured on the left and the maximum brake force measured on the right wheel of each axle The difference is expressed as a percentage of the higher of the two brake forces NOTE Many small front wheel driven vehicles produce lower brake forces on the rear axle brakes Although the difference as a percentage may seem high the absolute difference is insignificant At very low brake forces the difference is not shown 3 5 1 4 Brake force distribution front to rear With most vehicles the weight is not equally distributed between the axles the load on the front axle is usually higher than on the rear axle When a vehicle brakes even more weight is shifted to the front axle nose diving effect Therefore the front axle brakes must produce more brake force than the rear axle brakes The Arex Brake Analyser shows the front to rear ratio by indicating the contribution of both axles as a percentage of the total brake force If the brake force of the front axle is 50 of the total or less the percentages are presented on the screen in red 3 5 2 The interpretation of graphs After each brake test the screen also shows a gr
29. as a percentage of the adhesion of the vehicle when stationary static load Example static wheel load 250 kg minimum dynamic road adhesion 100 kg minimum adhesion percentage MAP 100 250 40 This minimum adhesion percentage is usually measured between 12 and 16 Hz depending on the vehicle type This percentage is determined for each of the four wheels and shown on the screen The right hand side of the screen shows these percentages as a value the left hand side shows these as four bar diagrams See example on the next page REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 FRONT REAR L R L R ACTUAL 637 76 317 DIFF WEIGHT 250kg WHEEL WEIGHT 260kg In order to determine whether the road adhesion is sufficient the Arex Suspension Analyser offers two methods 1 The EUSAMA method 2 The AREX method 4 3 1 The EUSAMA Method The EUSAMA European Shock Absorber Manufacturers method is a very simple one The measured minimum adhesion percentage should be compared to the EUSAMA results table Minimum Road Adhesion Conclusion 61 and more Excellent 41 60 Good 21 40 Fair 1 20 Poor 0 Bad The EUSAMA graph shows the complete measurement with these reference values REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 ARA LEFT RIGHT FRONT 83 RE
30. ay unit for these modules It can store the measured values and convert them into easy to understand figures and graphs on the monitor The monitor also displays instructions to guide the operator through the test procedures simplifying the operation The Arex computer is available in two versions each of them can operate all existing modules These versions are GC1700 en GC2002 GC1700 A PC based computer with Hard disk 3 5 Disk drive and 17 full colour SVGA Monitor The metal cabinet consists out of the following parts Acompartment protected by a door to accommodate the computer brake box and optional printer A drawer to accommodate the alphanumeric keyboard The monitor 17 standard is situated on top of the cabinet The GC1700 can have the following accessories Infra red remote control RS1200 with receiver ER1200 A4 full colour inkjet printer PR3010 or b w laser printer PR3015 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 A PC based computer with Hard disk 3 5 Disk drive and 19 SVGA colour monitor The metal cabinet has a luxury concave shaped front and consists of following compartments Acompartment to accommodate the monitor which is placed behind a special tinted glass fascia to protect it against dirt and to give optima readings A drawer compartment to accommodate the alphanumeric keyboard Acompartment to accommodate the com
31. call back onto the screen REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 13 2 5 2 The automatic mode Key 1 enables you to do an automatic test sequence without using the keyboard or the remote control e g service brake test parking brake test and weighing or side slip test suspension test or service brake test parking brake test etc depending on which modules are installed The particular sequence of this test can be customised and changed by the user The system even offers the possibility to create four different automatic test sequences For this we refer you to Chapter 8 After carrying out a complete automatic test the system automatically switches back to the beginning of the test showing it is ready for the first test Pressing E at any time before during or after an automatic test sequence brings the main menu back onto the screen 2 5 3 The brake system program Key 2 enables you to select the Brake Analyser program and from the Brake Test Menu selected you can choose a separate test e g service brake test or rolling resistance ovalisation test See Chapter 3 2 5 4 The suspension program Key 3 enables you to select the Suspension Analyser program From the Suspension Test Menu selected you can choose a separate test e g front axle test See Chapter 4 2 5 5 The side slip program Key 5 enables you to select the Side Slip Meter progr
32. cles In order to test the ABS function it is advisable to do a normal brake test first After this normal brake test repeat the service brake test but now at a speed exceeding 6 mph exceeding 10 km h Press the brake pedal abruptly with a high force and ABS should start to work The curves show the pulsing of the ABS system REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 6 Common brake problems and how to identify them In the brake test menu under key 9 Help the next examples of common brake problems are shown on screen In this paragraph the brake problems will be described 3 6 1 Synchronisation Synchronisation is an indication as to whether all four wheels start functioning at the same time Ideally brakes on the same axle start at the same time Also the rear brakes should not start before the front brakes Synchronisation left right Synchronisation front rear PON REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 6 2 Iron on iron Iron on iron means the friction material is completely worn Though the brake force may be high or even higher than normal the brake force diagram will be ragged Iron on iron 3 6 3 Retardation Retardation means that one brake although started simultaneously with the other is slower to build up to its maximum brake force A restrict
33. creen is used to show the graphs with only a small corner showing the values This enlarges the graphs giving an extremely high resolution for an even better diagnosis of brake problems This screen is Key E returns you to the Brake Test Menu Press E again to go back to the Main Menu 3 4 Printing the Brake Test Results All the result screens shown in the previous paragraphs can be printed in three different ways 1 Selecting 7 gives a full colour print of the screen REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 Shows 20 samples per wheel per test out of the hundreds of samples actually taken See the example printout FRONT AXLE REAR AXLE 4 TOTAL BRAKE FORCE DECELERATION FRONT REAR LEFT RIGHT DIFF LEFT RIGHT 440N 340N 23 90N 165N 730N 655N 10 50N 30N 960N 945N 2 30N 30N 1220N 1170N 4 450N 285N 1570N 1530N 3 645N 435N 1965N 1975N 1 845N 580N 2680N 2750N 3 1065N 775N 2940N 2955N 1 1125N 825N 3005N 2995N 0 1410N 835N 3195N 3135N 2 1110N 840N 3200N 3150N 2 1100N 815N 3325N 3240N 3 1080N 780N 3385N 3285N 3 1015N 730N 3075N 3010N 2 625N 395N 1120N 1005N 10 ON ON ON ON 0 ON ON ON ON 0 ON ON ON ON 0 ON ON ON ON 0 ON ON ON ON 0 ON ON 3385 N 3285N 3 1125N 825N 27 8330 N 7 3m s2 DIFF TOTAL 45 1035N 40 1465N 0 1965N 37 3125N 33 4180N 31 5365N 27 T27ON 27 1845N 25 7945N 24 8280N 26 8265N 28
34. ctly the measuring plate the larger of the two is pushed sideways The sideways movement is measured by a linear transducer which sends a signal to the computer through a signal cable The smaller of the two movable top plates serves to compensate for any lateral forces within the tyre wheel ensuring very accurate readings 1 3 3 The Weighing Scales The Weighing Scales consist of two separate weighing bars for left and right wheels that need to be driven over very slowly The load transducer mounted inside each bar measures the weight of the vehicle per wheel and signals this through to the computer The Weighing Scales main function is to determine the vehicles weight for calculation of the brake efficiency deceleration in combination with a brake test NOTE All the above items can be flush installed into the floor or surface mounted on the floor 1 3 4 The Suspension Analyser The Suspension Analyser consists of two mechanical units and a relay box Each unit consists of an electric motor load transducers a measuring plate and a frame When a vehicle is slowly driven onto the measuring plates the motor starts and the measuring plates start to vibrate 0 25Hz 0 The load transducers continuously measure the dynamic weight of the wheels on the measuring plates These measurements are signalled through to the computer The Suspension Analyser also serves as weighing scales 1 4 The GC1700 and GC2002 accessories 1 4 1 The in
35. e full length of the plates This improves the diagnosis with the graphs Avoid applying the brake pedal too abruptly REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 ie gt After the vehicle has come to a standstill at the far end of the brake plates the front axle results appear on the screen The screen shows the maximum brake force measured left and right together with the imbalance left to right Should the imbalance be over the maximum allowed it is shown in red gt Drive off the brake plates backwards and place the vehicle in line with the plates again gt The screen shows READY FOR REAR AXLE Follow the same procedure as for the front axle but now apply the brake pedal when the rear axle hits the friction surface of the brake plates After the test the screen shows the front and rear axle results in one screen gt Drive off the brake plates backwards and place the vehicle in line with the plates again gt The screen shows READY FOR PARKING BRAKE Follow the same procedure as for the front and rear axle but now apply the parking brake when the parking brake axle hits the friction surface of the brake plates After the test the screen shows the parking brake results gt After completion of the whole test the system reverts back to the beginning of the automatic test procedure and is ready to test the next vehicle Pushing E ta
36. easured when driving onto the Suspension Analyser In situation 2 and 3 the sideslip can be measured when driving onto the brake tester In situation 4 the sideslip test is a separate test For these and other possibilities we refer to Chapter 8 5 1 The sideslip test The most reliable sideslip readings are obtained if the car body and suspension are at rest Any imposed sideways movement of the wheels due to bumping of the car or steering action will influence the measurement Position the wheel in front of and in line with the sideslip meter Drive up slowly and make sure the steering wheel is in the neutral position Declutch or set in neutral before passing across the sideslip meter plate and do not touch the steering wheel NOTE Always ensure that only the wheels that you want to test pass across the sideslip meter plate Otherwise you mix up front and rear axle readings This is particularly important when doing a separate sideslip test 5 1 1 The automatic side slip test Where the sideslip test is carried out whilst driving up for the brake test it is of course impossible to drive slowly Also keeping the car body and wheel suspension at rest is difficult Testing sideslip in this way may lead to less reliable results and it is recommended that you carry out the side slip test separately In a combined side slip brake test the sideslip results are shown on the service brake results screen See an example on the next page REF
37. ed brake pipe often causes this Note If both brakes are slow to reach performance it is normally caused by the failure to depress the foot pedal to maximum Retardation REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 6 4 Greasy friction material When a brake cylinder is leaking the friction material can become greasy so that the brake force on that side will lag considerably Greasy friction material 3 6 5 Ovalisation Rolling resistance When a brake drum is out of round or a disc is distorted the brake force will fluctuate even with a constant pedal force There are a number of different ways ovalisation may show on the screen The most common are shown Ovalisation LA REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 32 ar S The best way to identify ovalisation is to use the special Rolling resistance Ovalisation program By applying a slight constant pedal pressure and rolling across the plates any distortion will become evident Ovalisation 3 6 6 Dragging brake Rolling resistance A dragging brake is a brake that when releasing the pedal does not come back to its neutral position in time Sometimes a brake may not come free at all which will cause excessive resistance Dragging brake gee REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002
38. eneral each of these three parts contains specific information The top box generally serves as a header for the information displayed in the middle box e g TEST REPORT or MAIN MENU The middle box shows the actual information e g a menu or the results itself The lower box generally instructs the operator what to do e g 8 9 PRINT E CONTINUE Each menu shows a numbered list of possibilities By selecting the number key of your choice the computer will act accordingly All texts and figures have a specific colour code as described below blue neutral information white top box requirements yellow lower box green test results meeting or exceeding the requirements targets set red test results not meeting the requirements targets set REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 2 3 The programme s structure The Arex Test Lane can operate various modules it is a combination of a number of diagnostic items linked into one single system In order to facilitate this integration of modules the computer is provided with a software program which links the modules by means of a Main Menu to each other With this menu one can choose a particular test on one of the modules e g a brake test on the Brake Analyser or a combination of tests e g brake test side slip test suspension test The main menu also offers the option to refe
39. es not meet the legal standard of 1 2 m s 475 N 500 N 975 N 975 1125 kg 0 9 m s 3 3 3 Reviewing of the brake result screen Key 5 This report shows all relevant values on one screen The test report appears on the screen BRAKE TEST REPORT Newton LEFT RIGHT over MAX DIFF RATIO 4250 2770 35 x 20 x 84x 10 635 11 30 7 16 REQUIRED 5850 900 reouireo 1350 5 41100 ier 1125 kg 1 4 m s 2 9 PRINT E CONTINUE 3 3 3 1 Calculation with the brake force The brake force required is the minimum brake force necessary to stay within the legal deceleration of that vehicle weight REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 The minimum legal deceleration for Holland is 5 2 m s for service brakes and 1 2 m s for parking brakes If applied to this test report the calculation is as follows The Vehicle weight is 1125 kg The minimum legal deceleration is 5 2 m s 1125 x 5 2 5850 N The actual measured service brake force according to the Result screen is 8340 N so the deceleration is well within limits and therefore shown in green on the monitor screen or the printout 3 3 4 Reviewing the Rolling Resistance Key 6 The rolling resistance test results appear on the screen ROLLING RESISTANCE 18 9 PRINT E CONTINUE different from the other screens Almost the complete s
40. est front axle Parking brake test Slowly drive the front axle onto the suspension analyser Suspension test front axle Slowly drive the rear axle onto the suspension analyser Suspension test rear axle Place the vehicle in front of and in line with the brake plates Service brake test Parking brake test Slowly drive the front axle over the sideslip meter onto the suspension analyser Suspension test front axle Slowly drive the rear axle over the sideslip meter onto the suspension analyser Suspension test rear axle REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 ar S 7 2 The total results In case of a combined automatic test the results can be called back onto the screen separately as well as in combination By choosing 0 RESULTS from the RESULT SCREEN and then 0 TOTAL the combined result screen appears TOTAL RESULTS PARKING BRAKE lt SERVICE BRAKE E eee Sennen SUSPENSION wo oO AU AN N Ww f 7 9 PRINT E CONTINUE The total results screen can be included as a part of the automatic test sequence see chapter 8 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 8 CUSTOMISING THE SYSTEM The Arex system can contain various modules that can be installed and used in a variety of ways To enable the operator to get the be
41. frared remote control RC1200 The GC1700 and GC2002 computer can be operated by means of an infrared remote control This is a hand held numeric keyboard with an infrared transmitter By pointing the remote control at the ER1200 receiver and pushing a button one can operate the computer Normally the receiver is mounted at a suitable place in the workshop to ensure maximum range The maximum range is approximately 8 10 metres REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 The maximum range can be reduced for a number of reasons The receiver is covered with dust dirt The transmitter is covered with dust dirt Attempting to operate through a dirty windscreen Battery needs replacing 1 4 2 The printers 1 4 2 1 PR3010 Inkjet printer The GC1700 and GC2002 can use a full colour inkjet printer to print the test results It has a sheet feeder for 80 pcs A4 sheets The printer gets its power from the GC1700 or GC2002 but must be switched on separately from the computer For further information on the PR3010 we refer to the separate user manual delivered with the printer 1 4 2 2 PR3015 Laser printer The GC1700 and GC2002 can use a b w laser printer to print the test results It has a paper tray for 250 pcs A4 sheets The printer gets its power from the GC1700 or GC2002 but must be switched on separately from the computer For further information on the PR30
42. gh front axle first Parking brake on axle Fair adhesion green Suspension graph This is the minimum deceleration brake efficiency reguired for the service brake Example 5 2 m s is 5 2 506 is 5 0 This is the minimum deceleration brake efficiency reguired for the parking brake Example 1 8 m s is 1 8 25 is 2 5 This is the maximum sideslip reading for front and rear axle to pass the test Example 6m km is 6 Do you want to test sideslip during the automatic test Key 1 Yes Key 2 No Do you want to weigh the vehicle during the automatic test Key 1 Yes Key 2 No Do you want to have an automatic printout of the total test result after every automatic test Key 1 Yes Key 2 No In case of No you can always make a printout by pushing 7 8 or 9 if required Do you want to weigh front axle first Key 1 Yes Key 2 No Key 0 Axle detected by computer Key 1 Parking brake on front axle selected Key 2 Parking brake on rear axle selected Show the middle part of the reference bar in green or yellow Key 1 Green Key 2 Yellow Show the graph or the bars as the suspension result Key 1 Graph Key 2 Bars REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 After having entered all values pressing C will enable you to change the settings again pushing E confirms the setting Pushing E again brings the Customising Menu back onto
43. hicles Testing the ABS function Common brake problems and how to identify them Synchronisation Iron on iron Retardation Greasy friction material Ovalisation Rolling resistance Dragging brake Rolling resistance ABS System Braking distance table THE SUSPENSION ANALYSER The suspension test The automatic suspension test The manual suspension test REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 42 421 4 3 4 3 1 4 3 2 ol sa ar EE CC CG Di P io io O11 NN La g w DD ODOJ ee EE GA CAN Op GE ie NOOR OM 2 ho 7 1 7 1 1 7 1 2 7 1 3 7 2 ar S The suspension adhesion test results Printing the suspension adhesion test results Interpreting the suspension test results The EUSAMA method The AREX method THE SIDE SLIP METER The side slip test The automatic side slip test The manual side slip test Reviewing the results Front axle test Rear axle test Side Slip The sideslip results Printing the sideslip results Interpretation of side slip results THE WEIGHING SCALES Weighing a vehicle The automatic weighing test The manual weighing test Reviewing the weighing results Weighing the front axle Weighing of the rear axle Weighing of both axles Selecting one or more axles Printing the weighing results THE COMBINED AUTOMATIC TEST Combined automatic test sequences The 2 plate brake analyser with weigh
44. ient with your vehicle database it is very important every time you perform a test to enter the customer data in a uniform matter e g if the vehicle make is a Volkswagen you can enter Volkswagen or the abbreviation VW If you decided to use the abbreviation VW all Volkswagen test results should by stored under the abbreviation VW 11 2 1 Guidelines These are the guidelines for filling out the customer data screen for use in the database The general part is described in chapter 9 Enter the name of the customer Starts always with the family name first followed by the initials You have 20 positions Enter the licence plate number as it appears on the vehicle You have 20 positions Enter the chassis number as it appears on the vehicle You have 20 positions REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 Enter the vehicle make You have 20 positions Enter the model of the vehicle You have 20 positions Enter the year of manufacture You have 4 numerical positions Enter the mileage of the vehicle You have 8 numerical positions Enter the name of the technician You have 20 positions Enter the year the month and the day when the last test was performed You have 8 numerical positions CUSTOMER DATA CUSTOMER NAME Damme J C v LICENCE NUMBER F D F D 34 CHASSIS AC34523 4356 CAR MAKE UW MODEL Golf YEAR OF MANUFACTURE 1992 MILEAGE 11
45. ing scales The 4 plate brake analyser with side slip meter and weighing scales The 4 plate brake analyser with side slip meter and suspension analyser The total results REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 8 1 8 2 8 2 1 8 2 2 ar S CUSTOMISING THE SYSTEM Configuring the system Customising the system Select and customise mode Select and customise automatic CUSTOMER DATA Entering Customer data MAINTENANCE Maintenance of the computer and accessories Maintenance of the floor items Periodic maintenance VEHICLE DATA BASE Introduction How to organise your vehicle database Guidelines How to work with the database program How to save the test results How to read the test results REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 1 INTRODUCTION 1 1 Description of the Arex Test Lane The Arex Test Lane consists of various parts which can be devised into four main categories 1 The PC based computer in combination with the AREX brake box 2 The modules 3 The accessories 4 The options 1 2 The Arex Computer The Arex PC based computer in combination with the brake box is designed to operate one or more modules These modules are The Brake Analyser The Suspension Analyser The Side Slip Meter The Weighing Scales It serves as a control and displ
46. is the maximum The total brake force of the parking brake is the sum of the brake forces of the parking brake measured on the left and right wheel 3 5 1 2 The deceleration brake efficiency The Arex Brake Analyser determines the deceleration as follows deceleration rate total brake force vehicle weight Example total brake force 6000 Newton vehicle weight 1500 kilograms deceleration rate 6000 1500 4 0 m s Deceleration can also be expressed as a percentage of gravital acceleration 9 8 m s This is obtained by dividing the total brake force in kilogram force by the vehicle weight in kilograms x 100 The measured deceleration brake efficiency is compared with the requirements Should the measured value not meet the target set it is shown on the screen in red Where the vehicle weight is not measured or manually entered the exact deceleration brake efficiency cannot be determined In this case the Arex Brake Analyser presents the weight at which the measured brake force of the service brake parking brake of the vehicle does result in the required deceleration for example 50 at 1250 kg If the actual weight exceeds the indicated weight value the deceleration does not meet the requirement set of 50 see also 3 3 1 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 ar S 3 5 1 3 The difference in brake force Sufficient deceleration alone does not gu
47. kes you out of the automatic mode and brings the Main Menu back onto the screen Please note that you can change the contents and order of the Automatic test For this we kindly refer you to Chapter 8 3 1 1 1 Taking the vehicle weight during the brake test In case your system is provided with weighing scales or a Suspension Analyser and you wish to weigh the vehicle during the automatic brake test you can easily customise this We kindly refer you to Chapter 8 When having customised your system to weigh the vehicle during the brake test the screen will show DRIVE OVER WEIGH SCALES It is recommended to drive slowly over the weighing scales with both axles Driving too fast over the weighing scales could lead to an incorrect measurement The vehicle weight is then used to calculate the vehicle deceleration or brake efficiency Also see paragraph 3 4 1 REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 17 3 1 2 The manual brake test on a 2 plate version By choosing 2 BRAKE SYSTEM from the Main Menu you can carry out various brake tests independently These are shown in the Brake Test Menu AREX BRAKE ANALYSER 0 BRAKE RESULTS 9 HELP 1 FRONT AXLE 5 ROLLING RES F 2 REAR AXLE 6 ROLLING RES R 4 PARKING BRAKE E EXIT U 4 13 AX 2001 01 26 10 41 29 PLEASE SELECT For the actual procedure of the front rear and parking brake test we refer you
48. line shows the maximum deceleration brake efficiency achieved provided the vehicle weight is known either measured or entered manually DECELERATION 7 4 m s HEIGHT SIDE SLIP kg m km Ww 1125 87 84 16 18 9 PRINT E CONTINUE The calculation of the deceleration is done as follows The total brake force of 4 wheels is added up and then divided by the weight of the vehicle If we use the printed results from last page 4250 N 2770 N 710 N 635 N 8365 N 8365 1125 kg 7 4 m s If the weight of the vehicle is not known the computer calculates the maximum car weight allowed while still meeting the minimum legal deceleration If the minimum legal deceleration for service brakes is 5 2 m s the calculation is done as follows 4250 N 2770 N 710 N 635 N 8365 N 8365 N 5 2 1609 kg This means that any car weight under 1609 kg is passed The screens left hand side shows four graphs one for each wheel These graphs show the brake force development during the test for each wheel The screens right hand side shows the following values REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 3 3 1 1 The maximum brake force for each individual wheel The colours correspond to the graphs as follows left front blue right front purple left rear orange right rear yellow 3 3 1 2 The difference between left and right per axle
49. main unchanged As an additional facility the Brake Test Menu offers a further test for rolling resistance ovalisation After selecting this test you let the vehicle slowly roll across the plates slightly touching the brake pedal and in neutral gear This enables you to determine whether one or more wheels have excessive rolling resistance Another feature of the test is to drive on slowly and brake firmly then release your foot briefly from the pedal during the test and brake again From the graphs you can see whether the brakes start and release correctly 3 3 The brake test results After completion of a brake test the results can be called back onto the screen The result of a test remains in the computers memory until the next test is started There are two ways to call the results back onto the screen 1 Select 0 RESULTS from the Main Menu The Results Menu appears and then by selecting 2 BRAKE SYSTEM the Brake Results Menu appears AREX BRAKE RESULTS 3 SERVICE BRAKE 4 PARKING BRAKE o BRAKE TEST REPORT 6 ROLLING RESISTANCE E EXIT 2001701726 09 57 15 PLEASE SELECT REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 21 2 Select O RESULTS from the Brake Test Menu The Brake Results Menu is shown on the previous page 3 3 1 Reviewing the service brake results screen Key 3 The service brake results appear on the screen The top
50. not to use air or water underneath the plates This could damage the bearings Avoid using aggressive detergents This can also damage the bearings and even the force transducers Never try to lift or move the plate without the supervision of a trained Arex engineer 10 3 Periodic Maintenance For periodic maintenance calibration and service contact your Arex supplier installer REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 a af S CHAPTER 11 VEHICLE DATA BASE 11 1 Introduction Arex has developed the option to store the test results of a vehicle on the hard disk of the computer This makes it possible over the years to track the test results of a vehicle under maintenance in your workshop and show these stored results on the computer These stored results can give the technician valuable information about The history of the vehicle The driver characteristics of handling its vehicle The quality of the replaced parts The technicians ability to make a right diagnosis Factory characteristics of a specific make Factory characteristics of a specific model Factory characteristics of a specific year The next paragraphs will show you step by step How to organise your database How to work with the database program How to save the test results How to read the test results from the hard disk 11 2 How to organise your vehicle database In order to work effic
51. oad As the vibrating frequency gradually decreases from 25 Hz back to 0 Hz the system continuously measures the dynamic road adhesion REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 gt gt gt ar S As soon as the left hand side plate wheel has come to a standstill the procedure is automatically repeated for the right hand side plate wheel The measured values then appear on the screen static wheel load static axle load minimum dynamic road adhesion per wheel and the imbalance between the wheels The screen also shows the dynamic road adhesion in bar graphs Below is an example REAR AXLE FRONT REAR FRONT REAR L R R L R L R REF L READY FOR SUSPENSION TEST ACTUAL 63 76 7 DIFF 13 4 WEIGHT 615 ky Once the front axle test is completed the screen will show READY FOR NEXT TEST Slowly drive the rear axle onto the two raised sections of the Suspension Analyser The screen now will show READY FOR SUSPENSION TEST and the same procedure as for the front axle is now automatically repeated for the rear axle After the rear axle test the screen shows the total suspension test results by adding the rear results to the previous screen Below is an example ADHESION TEST REAR FRONT REAR R L R L R ACTUAL 637 16311 56 FRONT L REF DIFF 13 2
52. ow to save the test results After conducting a test and reviewing the test results you may wish to store these results on your hard disk e Select key 0 RESULTS from the main menu and the screen as shown below appears RESULTS 0 TOTAL MOTORCYCLE 2 BRAKE SYSTEM 8 SAVING 3 SUSPENSION 9 READING 5 SIDE SLIP C CLEAR 6 WEIGHING E EXIT U 4 13 AX 2001 01 26 09 56 04 PLEASE SELECT REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 e Select key 8 SAVING from the results menu and the screen as shown below appears SAVING TESTDATA Give here your comment _ Date Time 19987 01729 14 45 16 Customername Damme J C v Licence nr FD FD 34 Chassis 1 AC34523 4356 Make UW Car model Golf Year of man 1992 Mileage 111900 km Technician Hopper D Last test 19970914 F1 Help F3 Save F10 Delete Field Enter Confirm Field t 4 Change field ESC Menu If you would like to add some remarks to the test report E g Vehicle due for service again by 185000 km you can use the top box for this purpose If you did not enter the customer data in the customer menu or you want to change some data in the screen you can still do this before saving the test results on the computer To store the test results on the hard disk press key F3 Key ESC brings back the main menu and de computer is ready for
53. print of the screen 2 Selecting 9 gives a black white print of the screen 5 3 The interpretation of sideslip results The wheels of a vehicle must be aligned correctly Badly aligned wheels cause the tyres to wear rapidly Toe camber and caster must be adjusted according to specifications supplied by the manufacturer of the vehicle Toe which is the number one tyre wear angle is often expressed in meter per kilometre of deviation from the longitudinal axis of the vehicle It is important to distinguish between static toe and running toe The ideal toe setting to aim for regardless of the type of vehicle is always zero running toe This does not mean however that the static toe must be adjusted to zero Sideslip is dynamic phenomenon which can only be measured whilst moving The Arex Side Slip Meter measures the sideways movement of the wheels as they pass across the measuring plate The maximum displacement is expressed in meters per kilometre feet per mile This relates to the running toe The sideslip results toe in or toe out in m km should meet any legal requirements set by government bodies car manufacturers or the workshop itself These requirements are pre programmed into the computer during installation and or can be modified by the operator Also see Chapter 8 The system compares the test readings with the requirements set Should these readings not meet the requirements they are shown in red
54. puter and brake box A drawer for the optional printer and A4 paper The GC2002 can have the following accessories Infra red remote control RS1200 with receiver ER1200 A4 full colour inkjet printer PR3010 or b w laser printer PR3015 1 3 The Modules The following modules can be connected to the Arex computer 1 2 or 4 Plate Brake Analyser 2 Side Slip Meter 3 Weighing Scales 4 Suspension Analyser The next paragraphs describe the various modules 1 3 1 The Brake Analyser The Arex Brake Analyser consists of two or four brake plates which are mounted either in or on the floor Each plate registers the brake force of a wheel when braked upon it The brake plate consists of a sub frame mounted firmly to the floor and a top plate which can move freely forwards due to the use of needle bearings between them to minimise friction The top plate has an expanded metal surface to create a good friction contact A force transducer measuring the brake force is mounted between the top plate and the sub frame A signal cable connects the force transducer to the computer REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 1 3 2 The Side Slip Meter The Arex Side Slip Meter consists of two movable top plates mounted on a sub frame The top plates move on needle bearings The Side Slip Meter measures sideslip per axle If the wheels on the axle are not aligned corre
55. r axle at the same time Apart from the time saving aspect this test has a number of other advantages in comparison to a test on a 2 plate version the brake force ratio between front and rear is clearly shown time synchronisation between front and rear is clearly shown The 4 plate brake test can be carried out in automatic as well as in manual mode 3 2 1 The automatic brake test on a 4 plate version Please note that you can change the contents and sequence of the automatic test For details we refer you to Chapter 8 An automatic brake test for service brake and parking brake is carried out as follows gt At the start of the automatic brake test the screen shows READY FOR SERVICE BRAKE The system is now ready to test the front and rear axle service brakes Before driving onto the plates please note 1 It is recommended that you firmly apply the braking pedal a couple of times just before carrying out the actual test This is to ensure that the brakes do function and to eliminate any possible condensation moisture on the brake drums discs 2 Align the vehicle approximately 2 metres in front of the brake plates to enable you to accelerate up to 10 km h 5 6 mph 3 Check to make sure that the brake plates and surrounding area are clear of any obstructions gt Drive onto the brake plates at a speed of 10 km h 5 6 mph Apply the brake pedal as soon as the front axle reaches the friction surface of
56. r to results of the previous combined test Furthermore the main menu offers a number of other general functions such as changing the date and customising the system The main menu is described in paragraph 2 5 2 4 The Daily Start There is an on off switch mounted in the computer cabinet which switches the computer the monitor and the brake box The optional printer has to be switched on separately REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 5 ar S After switching on the computer the safety screen appears We strongly recommend that you read the CE safety manual very carefull before operating the system Press key E to confirm that you noticed the warning on the screen The system is now ready for carrying out a test 2 5 The Main Menu Here is a picture of the system s Main Menu AREX ANALYSERS 0 RESULTS 5 SIDE SLIP 1 AUTOMATIC 6 WEIGHING 2 BRAKE SYSTEM CUST DATA 3 SUSPENSION 9 DATE C CUSTOMISE 2001701726 09 52 52 PLEASE SELECT By choosing one of the options given you are able to start a test look into the results or customise the system The screen successively shows the following options 2 5 1 Reviewing the results Key 0 enables you to refer to the results of the previous combined test From the Results Menu selected you can choose the particular results you wish to
57. ribes an automatic suspension test 4 1 2 describes a manual suspension test 4 1 1 The automatic suspension test Important actions to be taken before the test are 1 Check the tyre pressure on all wheels The tyre pressure must be set to the prescribed value Failure to do so could lead to invalid readings 2 The vehicle should not carry heavy loads because that is not representative for the normal use of the vehicle 3 The wheel load should not exceed 800 kg when carrying out a suspension test Excessive loads may cause serious damage to the force transducers An automatic suspension test of front and rear axles is carried out as follows gt At the start of the automatic suspension test the screen shows FRONT AXLE READY FOR SUSPENSION TEST The system is now ready to test the vehicles front suspension Drive slowly onto the two raised sections of the suspension analyser Make sure the wheels are centred the wheels are clear of the floor During the test it is important not to leave the vehicle not to let the wheels roll off the plates to avoid using service brake and or parking brake to make sure the gear is in the neutral position gt A few seconds after driving onto the measuring plates the screen shows MOTOR STARTS The left hand side motor starts and the measuring plate starts vibrating at 0 Hz to 25 Hz gt A few seconds later the motor stops and the screen shows the static wheel l
58. st out of the equipment the system can easily be customised to suit your particular requirements Some of this is done during installation configuration some can be done by the operator through C CUSTOMISE in the Main Menu 8 1 Configuring the system During installation the engineer will enter some data into the computer This data tells the computer which modules are actually installed and the layout of the different modules e g Is the side slip meter installed in front of the suspension analyser or between the front and rear brake plates etc At the same time the engineer enters the owners name address etc This data then appears on all the result printouts This configuration is stored in the computer under a password and can only be changed by a qualified engineer 8 2 Customising the system As auser of the Arex system you can customize your preferences There are two sorts of customising 1 Mode Here the operator can customise the analyser to his own specifications 2 The automatic sequence of testing Here you can determine which tests you would like to do and in what sequence these tests are preformed The selected preferences can be stored in 4 different modes in the computer For customising the system to your specifications select C CUSTOMISE from the main menu The Customising Menu as shown on the next page appears REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002
59. th Weighing Scales In this case the sideslip meter is normally installed at the drive up side of the brake plates The weigh scales are installed in front of the sideslip meter gt Place the vehicle in front of and in line with the brake plates in order to do a front axle service brake test gt Service brake test front gt Service brake rear gt Reverse back over the weigh scales gt Parking brake test 7 1 2 The 4 plate Brake Analyser with Side Slip Meter and Weighing Scales For this combination there are two popular ways of installation A Brake Analyser Weigh Scales B Brake Analyser Side Slip Meter Weigh Scales A gt Place the vehicle in front of and in line with the brake plates gt Service brake test gt Reverse and slowly drive over the weigh scales gt Parking brake test B gt Place the vehicle in front of and in line with the brake plates gt Service brake test gt Parking brake test gt Slowly drive the front axle over the sideslip meter and weigh scales gt Slowly drive the rear axle over the sideslip meter and weigh scales N B The two above mentioned procedures also apply to situations where the suspension analyser is used as weigh scales only not for a complete suspension test 7 1 3 The 4 plate Brake Analyser with Side Slip Meter and Suspension Analyser For this combination there are four popular ways of installation A
60. the front brake plates the closest to the monitor Try to apply the pedal force gradually using the full length of the plates This improves the diagnosis and clarity of the graphs Avoid applying the brake pedal too abruptly Once the vehicle has come to a standstill on the plates front axle at the far end of the front brake plates the results appear on the screen The screen shows the maximum brake force measured on each wheel together with the imbalance left to right across each axle Should the imbalance be over the maximum allowed it is shown in red REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 19 x a S plates again It is important to clear the plates within 10 seconds Should you delay the computer will interpret your driving off the plates as the next test gt The screen now shows READY FOR PARKING BRAKE Follow the same drive on procedure as the front and rear axle but now apply the parking brake The system automatically checks on which plate to measure the parking brake After the test the screen shows the parking brake results gt Drive off the brake plates in reverse After completion of the whole test the system reverts back to the beginning on the automatic test procedure and is ready to test the next vehicle Pressing E takes you out of the automatic mode and brings the Main Menu back onto the screen Please note that you c
61. the next test sequence 11 5 How to read the test results If you would like review a test result from a vehicle which has been stored in the database the procedure is as follows e Select key 0 RESULTS from the main menu and de results screen will appear e From the results menu you select key 9 and the READ TEST DATA screen as shown below appears REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 67 Date Time Chassis Make Car model Mileage Last test F1 Enter Confirm F3 Select Mode Help t 4 Change field ENTER SEARCH KEY ON ANY FIELD Customername Licence nr Year of man Technician F8 Clear fields ESC Menu You have the following options for example to find the test results you just saved You can search on Date Time Customer name Licence NR Chassis Make Model Year of manufacture Mileage Technician Last Test In this case we will search on Licence number e Move the cursor with the ENTER key or the arrow down to Licence NR REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 e Enter the licence NR FD FD 34 See below READING TESTDATA Po ENTER SEARCH KEY ON ANY FIELD Date T ime Customername _ Licence nr FD FD 34 Chassis Make Car model Year of man Mileage Technician Last test
62. the screen In accordance with the above you can now set the other 3 modes to your specifications The settings of the 4 different modes will be stored on your computer Warning Do not drive over the suspension analyser with a vehicle wheel load exceeding 800 kg 8 2 2 Select and customise Automatic Key 2 enables you to select one out of four different automatic test sequences and to change the 4 automatic test sequences to your own specifications All automatic tests will then be carried out in accordance with the test sequence you have stored Four different test sequences are given on this and next page The boxed settings in the pictures are translated to the actual test sequence and given beside the picture The advantage of this programme is that once you have set the automatic test sequences you can easily switch from one test sequence to the other according to your needs CUSTOMISE AUTOMATIC TESTS 1 SERVICE BRAKE 1 PARKING BRAKE 2 ROLLING RESI STANCE Automatic Test 3 4 Seguence Box 1 1 2 2 3 1 Service Brake SUSPENSION TEST 3 1 2 Parking Brake WEIGHING TOTAL RESULT 4 4 3 Suspension Test 4 Total Result A WN na 1 4 C CHANGE 9 PRINT E CONT CUSTOMISE AUTOMATIC Automatic Test TESTS 2 3 4 Sequence Box 2 PARKING BRAKE 2 3 2 3 1 Weighing ROLLING RESISTANCE Hoa TA i 2 Service Brake TOTAL RESULT 4 4 3 Parking Brake 4
63. tions Customer data can be entered before or after conducting a test but if printing of the Test report is part of an automatic test seguence you have to enter the customer data before you start the test seguence The data will remain in the printer header until you change it or switch the computer off REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 CHAPTER 10 MAINTENANCE The Arex system is very maintenance friendly Nevertheless it is important to closely follow the instructions below 10 1 Maintenance of the computer and accessories Before carrying out any maintenance to the Arex system make sure the computer and or accessories are disconnected from the main electrical supply When necessary the computer housing and glass fascia panel can be cleaned with a soft clean cloth dampened with a mild detergent dissolved in water Do not allow water to penetrate into the computer housing The printer and alphanumeric keyboard can be cleaned using a dry clean and soft cloth When you need to change the printer cartridges we would refer you to the separate manual delivered with the printer Printer cartridges can be ordered from your Arex supplier Any other maintenance should only be carried out by a trained Arex engineer 10 2 Maintenance to the floor items The floor plates can be cleaned by an occasional brushing with a broom It is strongly recommended
64. to the paragraphs above The difference compared to the automatic test is the fact you now need to switch manually from one test to another rather then having an automatic test sequence The manual brake test is particularly useful in case one specific part of the automatic brake test was not carried out correctly For example During the rear axle test of the automatic test you already braked while the wheels had not yet hit the friction surface After completion of the complete automatic test you can manually choose to do the rear axle test again By doing so you overwrite the results of the original rear axle test The other results remain unchanged In addition the Brake Test Menu offers the possibility to do a rolling resistance test After choosing this test you let the vehicle slowly roll over the plates without touching the brake pedal neutral gear advisable With this you can determine whether one or more wheels have excessive rolling resistance Another possibility with this test is to drive on and brake firmly and release your foot briefly from the pedal during the test From the graphs you can then see whether the brakes release correctly or if there is any ovality of the brake drums REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 18 3 2 A brake test on a 4 plate version On a 4 plate Brake Analyser the service brake is tested in one run front and rea
65. ure in both situations is the same The Arex brake analyser comes in two versions A 2 plate version A 4 plate version Paragraph 3 1 describes an automatic brake test consisting of a service brake test and a parking brake test on a 2 plate installation while the 4 plate brake test is described in paragraph 3 2 3 1 A brake test on a 2 plate version On a 2 plate Brake Analyser the service brake is tested in two runs one run for the front axle and one run for the rear axle 3 1 1 The automatic brake test on a 2 plate version An automatic brake test for front axle rear axle and parking brake is carried out as follows gt At the start of the automatic brake test the screen shows READY FOR FRONT AXLE The system is now ready to test the front axle brakes Before driving onto the plates note this 1 It is recommended to firmly apply the braking pedal a couple of times just before carrying out the actual brake test This is to ensure the brakes function at all and to remove possible condensation 2 Place the vehicle in line with the brake plates make sure the distance to the plates allows you to accelerate up to 6 mi h 3 Make sure there are no people and or object standing close to the brake plates gt Drive up onto the brake plates with a speed of 10 km h Apply the brake pedal as soon as the front axle hits the friction surface of the brake plates Try and progress the pedal force gradually using th
66. yser with Weighing Scales 2PW o RA2501 o o RA2501 o Slip Meter and weighing scales 4PSW see next page Analyser ST4PS see next Slip Meter and Suspension page 2 4 plate Brake Analyser with Side 3 4 plate Brake Analyser with Side BP2501 oo ANU NUN NUN MUKENA RUKUN KUNUUURKU CSAKA AAAA 268 CICA KK KKM KKM KK KKM KMK KKM KKM SIN OOOO COO KKM KKM KKM OOOO OO OOOO OOOO KKM KKR OOOO OOO OOOO OOOO OOOO OAD OCOOQOOO OOO COCO KKM KMK KMK OOK D OE BOOOOO OO OOOO OOOO OOO BP2501 OX ORION AKA 0000 Ow Ono A NK SRS III I III I III II ICI ICICI KKK NAK BRIO IIR IK RII AN CSSS SSS OOOO OO I SERRA SEGOOIIIIOOOIO OOK IKK IK KICK o o o o 202521 9 C02521 o o o RA2501 o o RA2501 o 2PV 225 x 62 CM 225 x 62 CM REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400 1700 2002 o RA2501 o o RA2501 o o RA2501 o o RA2501 o IOANA IIIA AIOI AAAA BP2501 990 PERKARA ANA aa ANN NN DKK KK KK RIS CCCII NN ANN CIIAN CIIIRT CIIIS 09C CSIR OOOO OOOO SOOOOOOOO OOOO XK Hanna xX XX ANN an CCSN COCAINA 9 999 990 9 0 9 0 0 9 0 0 9 0 0 0 0 6 0 0 4 000 0090 0 0 08 oe CICCA CODCOD RRR RK IK KH ORARI CRRA CICIR RIINAN CIIN CIIAN NAN NAN BP2501 OOK KKK KKK PKK CK KKK KD KK Manna naa NN AAAA KOSSAR KN AOOO DKK CK KKK IK DOK OOOO OOK COX COAL KICKS COOKOOOO

REFERENCE BOOK FOR AREX MODULAR SYSTEMS GC1400

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