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Shop manual máy đào HuynDai R250: An toan, cấu trúc, sơ đồ điện, thủy lực,
6-40GROUP 4 MECHATRONICS SYSTEM Wiring diagram1. ALL ACTUATORS SPEED ARE SLOWBoom, Arm, Bucket, Swing and travel speed are slow, but engine speed is good.Spec : H-mode 2250± 50rpmS-mode 2150 ± 50rpmBefore carrying out below procedure, check all the related connectors are properly inserted.INSPECTION PROCEDURE※※※1)SPEC : 200~450mASee TEST 3SPEC : 5~20kgf/cm2See TEST 4SPEC : 17.5±1Ω(20°C)See TEST 2Check if Er : 03on the clusterCheck electric current at EPPRvalveCheck resistance at EPPR valveCheck pressure at EPPR valveYESYESYESYESNONONONOCauseRemedyDefectivehydraulic systemDefectiveEPPR valveDefective CPUcontrollerShort circuit orpoor connectionbetween CN-50 -CN-75Defective EPPRvalveReplaceReplaceCheck and repairwire harness orbetween CN-50-CN-75Replace21076MS51 6-41TEST PROCEDURETest 1 : Check resistance at connectorCN-50(8)-(36).Starting key OFF.Disconnect connector CN-50.Check resistance between pin and atconnector CN-50(8)-(36).CPUCONTROLLERCN-50YRGCN-51MultimeterCN-50112 825361324CN-75MultimeterCN-75MultimeterEPPR VALVE(1)①②③2)Test 2 : Check resistance at connectorCN-75.Starting key OFF.Disconnect connector CN-75 from EPPRvalve at main hydraulic pump.Check resistance between 2 lines asfigure.(2)①②③Test 3 : Check electric current at EPPRvalve.Install multimeter as figure.Start engine.Set the accel dial at "10"(MAX)Set S-mode and cancel auto decel mode.If tachometer show approx 2150±50rpm, check electric current.(3)①②③④⑤SPEC : 17.5±1Ω(20°C)SPEC : 17.5±1Ω(20°C)SPEC : 200~450mA(S mode)29076MS02(290-7TIER) 6-38(2)(290-7TIER) 6-38(3) 6-42CN-75Supply line, pilot pressPressure adjustingscrew locknutSPEC : 5~20kgf/cm2(70~280psi)Test 4 : Check pressure at EPPR valve.Remove plug and connect pressuregauge as figure.・Gauge capacity : 0 to 40~50kgf/cm2(0 to 570~710psi)Start engine.Set the accel dial at "10"(Max).Set S-mode and cancel auto decel mode.If tachometer show approx 215050rpm,check pressure.If pressure is not correct, adjust it.After adjust, test the machine.(2)①②③④⑤⑥⑦(290-7TIER) 6-39(1) 6-43Wiring diagram1211CN-2CN-76CPU CONTROLLERCN-501212CD-17TACHO SENSORACCEL ACTUATOR123456MP+SIGP-NCM+M-21356CN-51202122252623rpm57CN-9ABC+S-CN-142ACCEL DIAL2. ENGINE SPEED IS SLOW AT ALL MODE Before carrying out below procedure, check all the related connectors are properly inserted.INSPECTION PROCEDURE※1)Cause RemedyIf test 7 is good,check TEST 1~4Misalignmentbetween speedsensor and flywheel ⓐDefective accelactuator or shortcircuit or poorconnectionbetween CN-50-CN-76Improper operationby loosening orinterference of cableShort circuit or poorconnectionbetween CN-50-CN-2-CD-17Defectivespeed sensorClean speedsensor andadjustSee : 5-20pageReplace accelactuator orharnessassemblyAdjust or repairCheck and repairReplaceGoodYESSPEC : 1~2ΩSee TEST 5See TEST 6SPEC : 0.2~0.4kΩSee TEST 8Check cablebetween accelactuator andinjection pump.Is resistancebetween CN-50(12) - (23) SPEC : 0.2~0.4kΩSee TEST 7Is resistancebetween CN-51(25) - (26)Is resistancebetween CD-17(1) - (2)Check tachometerwork properly ornot by changingthe mode.ⓐNo goodYESYESYESNONONONO29076MS03 6-44TEST PROCEDURETest 5 : Check resistance between CN-50(12)-(23).Starting key OFF.Disconnect connector CN-50 from CPUcontroller.Check resistance as figure.CPUCONTROLLERCN-50YRGCN-51MultimeterCN-5011225132336(1)①②③2)CN-50YRGMultimeterCN-5111225361324CPUCONTROLLERCN-5126SPEC : 0.2~0.4kΩTest 6 : Check tachometer(Work properlyor not)Start engine.Check tachometer reading.(2)①②Test 7 : Check resistance between CN-51(25) and CN-51(26).Starting key OFF.Disconnect connector CN-51 from CPUcontroller.Check resistance as figure.(3)①②③Unit : rpmH-modeS-modeSpec Remark2050±501950±50Check rpm after cancelthe Auto decel mode.SPEC : 1~2Ω29076MS0429076MS05 6-45CD-17MultimeterCD-17Speed sensorEngine flywheel12SPEC : 0.2~0.4kΩTest 8 : Check resistance at speedsensor.Starting key OFF.Disconnect connector CD-17 of speedsensor at engine flywheel housing.Check resistance as figure.(4)①②③(290-7TIER) 6-42(1) 6-46Wiring diagram3. ENGINE STALLBefore carrying out below procedure, check all the related connectors are properly inserted.INSPECTION PROCEDURE※1)YESSPEC : 200~450mASee TEST 3SPEC:5~20kgf/cm2See TEST 4SPEC : 17.5±1Ω(20°C)See TEST 2Check electriccurrent at EPPRvalveCheck pressureat EPPR ValveCause RemedyNot enough enginepowerDefective EPPRvalveShort circuit orpoor connectionbetweenCN-50 - CN-2 orCN-50 - CN-75Defective EPPRvalveContact cumminsengine dealerReplaceCheck and repairwire harnessReplaceYESYESNONONOCheck resistanceat EPPR valve21076MS51 6-47TEST PROCEDURETest 9 : Check electric current at EPPRvalve at S-modeInstall multimeter as figure.Start engine.Set the accel dial at "10"(max)Set S-mode with 2150±50rpm.Check electric current.CN-75MultimeterEPPR VALVECN-75Supply line, pilot pressPressure adjustingscrew locknut(1)①②③④⑤2)Test 10 : Check pressure at EPPR valveat S-modeConnect pressure gauge at EPPR valve.Start engine.Set the accel dial at "10"(max)Set S-mode with 2150±50rpm.Operate bucket lever completely push orpull.Hold arm lever at the end of stroke.Check pressure at relief position.(2)①②③④⑤⑥⑦SPEC : 200~450mASPEC : 5~20kgf/cm2(70~280psi)(290-7TIER) 6-44(1)(290-7TIER) 6-44(2) 6-484. MALFUNCTION OF CLUSTER OR MODE SELECTION SYSTEMBefore carrying out below procedure, check all the related connectors are properly inserted.INSPECTION PROCEDURE※1)See if Co : Eron the clusterSee if all lampsoff in the CPUcontroller caseCheck connectionbetween CN-51(29) - CN-50(10)or CN-50(30) -CN-5(11) Cause RemedyNo power supply tothe CPU controllerCPU failureⓐCluster failureNo connectionCheck fuseReplaceReplaceCheck and repairⓐGRYGRYRYGKEY OFFWiring diagramYESYESYESNOOKNONONO21076MS06 6-495. SLOW ACTION OF ENGINE SPEED CHANGE WHEN CHANGE THE MODE Before carrying out below procedure, check all the related connectors are properly inserted.INSPECTION PROCEDURE※1)YESSPEC : (20)-(21) : 5±1V(20)-(22) : 0.1~0.9kΩSee TEST 12Check interferencebetweenconnecting rod andaccel actuatorCheck voltagebetween CN-5(20)-(21) and checkresistance betweenCN-51(20)-(22)SPEC : 1~2ΩSee TEST 11Check resistancebetween CN-50(12)-(23)Cause RemedySlow action ofengine speedcontrol due tointerferenceDefective CPUcontrollerDefective accelactuatorDefective accelactuatorCheck and repairReplaceReplaceReplace1211CN-2CN-76CPU CONTROLLERCN-501212CD-17TACHO SENSORACCEL ACTUATOR123456MP+SIGP-NCM+M-21356CN-51202122252623rpm57CN-9ABC+S-CN-142ACCEL DIALWiring diagramYESYESNONONO29076MS03 [...]... figure CN-51 CN-50 CN-51 12 24 1 22 20 13 36 25 Multimeter 29076MS08 ② Check voltage between CN-51(20) and CN-51(21) SPEC : 5±1V Y R G CPU CONTROLLER - Prepare 2 pieces of thin sharp pin, steel or copper - Starting key ON - Insert prepared pins to rear side of connectors : One pin to CN-51(20) Other pin to CN-51(21) - Check voltage PIN CN-50 CN-51 CN-51 12 24 1 21 20 36 13 25 Multimeter 29076MS09 6 - 51... CD8(Sensor) Check resistance between CN-51 (31) - CD-8(1) Poor connection between CN51(31) - CD-8(1) NO Repair Poor connection between CN51(33) - CD-8(2) SPEC : Below10Ω KEY OFF Check resistance between CN -5 1 (33) - CD-8(2) Remedy Repair SPEC : Below 10 Ω KEY OFF NO Wiring diagram CONTROLLER WATER TEMPERATURE SENSOR 31 1 33 CN-51 5 6 2 C CD-8 CN-3 25076MS01 6 - 54 8 MALFUNCTION OF POWER MAX ※ Before carrying... inserted 1) INSPECTION PROCEDURE YES Check resistance YES Resistance between CN-51 (2)-GND normal? between CN-88 (1) - (2) Remedy Defective power Repair or replace max solenoid valve SPEC: 1 5-3 0 Ω See TEST 15 Short circuit or poor Repair or replace connection between CN-51(2) CS-29 and CN-50 (3) -CN-88(1) NO Is voltage between CN-88(1) -GND normal? Cause SPEC : Power max button pressed ON : 0 Power max button... ② Disconnect connector CN-50 from CPU controller ③ Check resistance between CN-50(12)(23) as figure Y R G CPU CONTROLLER CN-50 CN-51 CN-50 12 1 23 13 25 36 Multimeter 29076MS04 6 - 50 (2) Test 12 : Check voltage and resistance ① Check resistance between CN-51(20)(22) SPEC : 0.1~0.9k Ω Y R G CPU CONTROLLER - Starting key OFF - Disconnect connector CN-51 from CPU controller - Check resistance value with... CN-51 (1)-GND and CN-51(13)-GND SPEC : Actuator operating : 11~13V Actuator stop :0~2V See TEST 13 See TEST 14 Defective CPU controller NO Remedy Replace Short circuit or Replace or repair poor connection vetween CN-51(1), (13 )- pressure switches Defective auto decel pressure switch NO Replace Wiring diagram AUTO DECEL PRESSURE SWITCH CPU CONTROLLER 1 Pb 2 1 CD-7 1 13 Pa 2 CD-6 CN-51 29076MS10 6 -. .. Repair or replace connection between CN-88(2)battery relay(+) NO Wiring diagram 25076MS02 6 - 55 2) TEST PROCEDURE (1) Test 15: Check voltage between connector CN-88 - GND ① Start key ON ② Disconnect connector CN-88 from power max solenoid valve ③ Check voltage as figure SPEC : Key ON : 24±1V Key OFF : 0V Resistance : 15~30Ω Power max switch LH RCV-lever CN-88 CN-88 Power max solenoid valve Multimeter... CN-51 ④ Check voltage as figure CN-51 12 CN-51 1 24 36 25 Ground Multimeter CN-51 12 1 24 13 36 25 Ground Multimeter 29076MS11 6 - 53 7 MALFUNCTION OF WARMING UP ※ Before carrying out below procedure, check all the related connectors are properly inserted 1) INSPECTION PROCEDURE Cause YES YES Defective cluster or Repair or Replace CPU controller or CD8(Sensor) Check resistance between CN-51 (31) -. .. 29076MS04 (2) Test 16: Check resistance between connector CN-51(2)-GND ① Starting key OFF ② Remove CPU controller and disconnect connector CN-51 from CPU controller ③ Check resistance as figure SPEC : Power max button pressed ON : 0Ω Power max button released OFF : ∞Ω Y R G CPU CONTROLLER CN-51 CN-50 CN-51 12 2 24 13 36 25 Ground Multimeter 29076MS15 6 - 56 ... stop : 11~13V Actuator operating : 0~2V (1) Test 13 : Check voltage at CN-51(1) and ground ① Prepare 1 piece of thin sharp pin, steel or copper ② Starting key ON ③ Insert prepared pin to rear side of connectors : One pin to (1) of CN-51 ④ Check voltage as figure Y R G CPU CONTROLLER PIN CN-50 (2) Test 14 : Check voltage at CN-51(13)and ground ① Prepare 1 piece of thin sharp pin, steel or copper ② Starting . machine.(2)①②③④⑤⑥⑦(29 0-7 TIER) 6-3 9(1) 6 -4 3Wiring diagram1211CN-2CN-76CPU CONTROLLERCN-501212CD-17TACHO SENSORACCEL ACTUATOR12 345 6MP+SIGP-NCM+M-21356CN-51202122252623rpm57CN-9ABC+S-CN- 142 ACCEL. relief position.(2)①②③④⑤⑥⑦SPEC : 200 ~45 0mASPEC : 5~20kgf/cm2(70~280psi)(29 0-7 TIER) 6 -4 4(1)(29 0-7 TIER) 6 -4 4(2) 6 -4 84. MALFUNCTION OF CLUSTER OR MODE SELECTION