Troubleshooting - Engine Cranks But Will Not Start 655g69
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20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Pantalla anterior
Bienvenido: cr460cxa Producto: NO SE HA ESCOGIDO NINGUN EQUIPO Modelo: NO SE HA ESCOGIDO NINGUN EQUIPO Configuración: NO SE HA ESCOGIDO NINGUN EQUIPO
Localización y Solución de Problemas 3408E and 3412E Engines for Caterpillar Built Machines Número de medio SENR105406
Fecha de publicación 04012007
Fecha de actualización 04132007 i02645465
Engine Cranks but Will Not Start SMCS 7569
Probable Causes Diagnostic codes Event codes Fuel level Oil level Starting aids Shutdown switch Active Engine Shutdown Electrical connectors Circuit breakers Flash file Engine speed/timing Injection actuation pressure Unit injectors Fuel supply Combustion https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
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20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Recommended Actions Diagnostic Codes and Event Codes Certain diagnostic codes and/or event codes may prevent the engine from starting. Connect the Caterpillar Electronic Technician (ET) and check for active codes and/or logged codes. Troubleshoot any codes that are present before continuing with this procedure.
Fuel Level Visually check the fuel level. Do not rely on the fuel gauge only. If necessary, add fuel.
Oil Level Check the engine oil level. If necessary, add oil. Note: Engine oil supplies the injection actuation pressure circuit. Proper engine oil level is necessary for fuel injection.
Remote Shutdown Switch Make sure that the remote shutdown switch is run position. Use Cat ET to the status of the shutdown switch. If a problem with the remote shutdown switch is suspected, check the electrical circuit for the switch.
Electrical Connectors Check for correct installation of the following connectors: J1/P1 ECM connector J2/P2 ECM connector J20/P20 Engine speed/timing sensor connector J44/P44 Engine speed/timing sensor connector Unit injector connectors Refer to Troubleshooting, "Electrical Connectors Inspect".
Circuit Breakers Check the circuit breakers. if a circuit breaker is tripped, reset the circuit breaker.
Flash File that the correct flash file is installed in the ECM. https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
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20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Note: If a new ECM has been installed, the ECM will need to be programmed before the engine will run. Also, the ECM will not communicate with Cat ET if the ECM has not been programmed.
Engine Speed/Timing 1. Crank the engine and observe the engine speed on the status screen in Cat ET. If Cat ET indicates 0 rpm, troubleshoot the circuit for the engine speed/timing sensor. 2. Ensure that the timing reference gear is installed correctly. The engine will not start if the gear was installed backward. Check for proper orientation between the crankshaft and camshaft drive gears. Correct the orientation and/or replace the drive gear, if necessary. Refer to the engine's Disassembly and Assembly manual.
Injection Actuation Pressure 1. Check the engine oil level. if necessary, add oil. that the pressure for the lube oil system is accurate. Note: Engine oil supplies the injection actuation pressure circuit. proper engine oil level is necessary for fuel injection. 2. Crank the engine while you observe the injection actuation pressure on the Cat ET status screen. if the injection actuation pressure is at least 5000 ± 200 kPa (725 ± 29 psi), the problem is not in the injection actuation pressure control system. 3. Check the seals on the injection actuation pressure control valve. if the seals are faulty, replace the seals and repeat Step 1. 4. Check the wiring harness to the injection actuation pressure control valve for opens and/or shorts. 5. Measure the coil resistance on the injection actuation pressure control valve. If the coil resistance is not between 5.0 Ohms and 15.0 Ohms, replace the injection actuation pressure control valve. 6. If the injection actuation pressure during cranking is less than 5000 ± 200 kPa (725 ± 29 psi), the high pressure oil supply circuit may have a leak. a. Unplug the injection actuation pressure control valve and the unit injector connectors.
This engine uses high voltage to control the fuel injectors. Disconnect electronic fuel injector enable circuit connector to prevent personal injury. Do not come in with the fuel injector terminals while the engine is running. b. Disable the unit injectors with Cat ET and/or the engine shutdown switch. https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
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20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
c. Remove the valve mechanism cover. d. Crank the engine while checking the drain holes in the unit injector adapter and the jumper block seals for leaks. e. Excessive leakage will result in a large stream of oil flow from the drain hole of the affected unit injector's adapter. The splashing of engine oil will be visible at the bottom of the oil shield for the jumper block's adapter. IF an excessively leaking unit injector is diagnosed, replace only the excessively leaking unit injector. Leaking jumper block seals can also create this problem. This can be diagnosed with the technique that is described above. Replace leaking seals. f. If the problem persists, there may be a problem with the pump compensator displacement control. Correct this problem with the compensator's kit. Adjust the load for the spool spring by turning the retaining screw. Unplug the injection actuation pressure control valve and adjust the screw in order to obtain a pressure of 5000 ± 200 kPa (725 ± 29 psi) during engine cranking. g. If the injection actuation pressure remains low after installing a new kit for the compensator, install a longer plug for the compensator. The longer compensator plug that is marked with a "D" is part of the plug kit. If the injection actuation pressure is above the specified range, select the shorter compensator plug from the plug kit that is marked with a "B". h. If the pressure cannot be obtained, replace the pump or rebuild the pump.
Unit Injectors Perform the Injector Solenoid Test with Cat ET in order to determine if all of the injector solenoids are being energized by the ECM. Troubleshoot the electrical circuit for the injectors.
Fuel Supply 1. Check the fuel lines for the following problems: restrictions, collapsed lines and pinched lines. If problems are found with the fuel lines, repair the lines and/or replace the lines. 2. Check the fuel tank for foreign objects which may block the fuel supply. 3. Check for air in the low pressure fuel supply system if any of the following procedures have been performed: Replacement of the fuel filters Service on the low pressure fuel supply circuit Replacement of unit injectors Note: A sight glass in the low pressure supply line is helpful in diagnosing air in the fuel. Refer to Testing and Adjusting for more information.
NOTICE https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
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20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
4. Purge air from the low pressure fuel supply circuit. Refer to Operation and Maintenance Manual, "Fuel System Prime" for the correct procedure. 5. Check fuel quality. In temperatures below 0 °C (32 °F), check for solidified fuel (wax). Refer to Special Instruction, SEBD0717, "Diesel Fuels And Your Engine". 6. Check the fuel pressure after the fuel filter while the engine is being cranked. Refer to Testing and Adjusting for the correct pressure values. If the fuel pressure is low, replace the fuel filters. If the fuel pressure is still low, check the following items: fuel transfer pump, fuel transfer pump coupling and fuel pressure regulating valve. Refer to Testing and Adjusting for more information.
Combustion Check for combustion problems. Copyright 1993 2015 Caterpillar Inc. Todos los derechos reservados. Red privada para licenciados del SIS.
Sat Jun 20 2015 13:32:15 GMT0500 (Hora est. Pacífico, Sudamérica) cr460cxa
https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
5/5
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Pantalla anterior
Bienvenido: cr460cxa Producto: NO SE HA ESCOGIDO NINGUN EQUIPO Modelo: NO SE HA ESCOGIDO NINGUN EQUIPO Configuración: NO SE HA ESCOGIDO NINGUN EQUIPO
Localización y Solución de Problemas 3408E and 3412E Engines for Caterpillar Built Machines Número de medio SENR105406
Fecha de publicación 04012007
Fecha de actualización 04132007 i02645465
Engine Cranks but Will Not Start SMCS 7569
Probable Causes Diagnostic codes Event codes Fuel level Oil level Starting aids Shutdown switch Active Engine Shutdown Electrical connectors Circuit breakers Flash file Engine speed/timing Injection actuation pressure Unit injectors Fuel supply Combustion https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
1/5
20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Recommended Actions Diagnostic Codes and Event Codes Certain diagnostic codes and/or event codes may prevent the engine from starting. Connect the Caterpillar Electronic Technician (ET) and check for active codes and/or logged codes. Troubleshoot any codes that are present before continuing with this procedure.
Fuel Level Visually check the fuel level. Do not rely on the fuel gauge only. If necessary, add fuel.
Oil Level Check the engine oil level. If necessary, add oil. Note: Engine oil supplies the injection actuation pressure circuit. Proper engine oil level is necessary for fuel injection.
Remote Shutdown Switch Make sure that the remote shutdown switch is run position. Use Cat ET to the status of the shutdown switch. If a problem with the remote shutdown switch is suspected, check the electrical circuit for the switch.
Electrical Connectors Check for correct installation of the following connectors: J1/P1 ECM connector J2/P2 ECM connector J20/P20 Engine speed/timing sensor connector J44/P44 Engine speed/timing sensor connector Unit injector connectors Refer to Troubleshooting, "Electrical Connectors Inspect".
Circuit Breakers Check the circuit breakers. if a circuit breaker is tripped, reset the circuit breaker.
Flash File that the correct flash file is installed in the ECM. https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
2/5
20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Note: If a new ECM has been installed, the ECM will need to be programmed before the engine will run. Also, the ECM will not communicate with Cat ET if the ECM has not been programmed.
Engine Speed/Timing 1. Crank the engine and observe the engine speed on the status screen in Cat ET. If Cat ET indicates 0 rpm, troubleshoot the circuit for the engine speed/timing sensor. 2. Ensure that the timing reference gear is installed correctly. The engine will not start if the gear was installed backward. Check for proper orientation between the crankshaft and camshaft drive gears. Correct the orientation and/or replace the drive gear, if necessary. Refer to the engine's Disassembly and Assembly manual.
Injection Actuation Pressure 1. Check the engine oil level. if necessary, add oil. that the pressure for the lube oil system is accurate. Note: Engine oil supplies the injection actuation pressure circuit. proper engine oil level is necessary for fuel injection. 2. Crank the engine while you observe the injection actuation pressure on the Cat ET status screen. if the injection actuation pressure is at least 5000 ± 200 kPa (725 ± 29 psi), the problem is not in the injection actuation pressure control system. 3. Check the seals on the injection actuation pressure control valve. if the seals are faulty, replace the seals and repeat Step 1. 4. Check the wiring harness to the injection actuation pressure control valve for opens and/or shorts. 5. Measure the coil resistance on the injection actuation pressure control valve. If the coil resistance is not between 5.0 Ohms and 15.0 Ohms, replace the injection actuation pressure control valve. 6. If the injection actuation pressure during cranking is less than 5000 ± 200 kPa (725 ± 29 psi), the high pressure oil supply circuit may have a leak. a. Unplug the injection actuation pressure control valve and the unit injector connectors.
This engine uses high voltage to control the fuel injectors. Disconnect electronic fuel injector enable circuit connector to prevent personal injury. Do not come in with the fuel injector terminals while the engine is running. b. Disable the unit injectors with Cat ET and/or the engine shutdown switch. https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
3/5
20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
c. Remove the valve mechanism cover. d. Crank the engine while checking the drain holes in the unit injector adapter and the jumper block seals for leaks. e. Excessive leakage will result in a large stream of oil flow from the drain hole of the affected unit injector's adapter. The splashing of engine oil will be visible at the bottom of the oil shield for the jumper block's adapter. IF an excessively leaking unit injector is diagnosed, replace only the excessively leaking unit injector. Leaking jumper block seals can also create this problem. This can be diagnosed with the technique that is described above. Replace leaking seals. f. If the problem persists, there may be a problem with the pump compensator displacement control. Correct this problem with the compensator's kit. Adjust the load for the spool spring by turning the retaining screw. Unplug the injection actuation pressure control valve and adjust the screw in order to obtain a pressure of 5000 ± 200 kPa (725 ± 29 psi) during engine cranking. g. If the injection actuation pressure remains low after installing a new kit for the compensator, install a longer plug for the compensator. The longer compensator plug that is marked with a "D" is part of the plug kit. If the injection actuation pressure is above the specified range, select the shorter compensator plug from the plug kit that is marked with a "B". h. If the pressure cannot be obtained, replace the pump or rebuild the pump.
Unit Injectors Perform the Injector Solenoid Test with Cat ET in order to determine if all of the injector solenoids are being energized by the ECM. Troubleshoot the electrical circuit for the injectors.
Fuel Supply 1. Check the fuel lines for the following problems: restrictions, collapsed lines and pinched lines. If problems are found with the fuel lines, repair the lines and/or replace the lines. 2. Check the fuel tank for foreign objects which may block the fuel supply. 3. Check for air in the low pressure fuel supply system if any of the following procedures have been performed: Replacement of the fuel filters Service on the low pressure fuel supply circuit Replacement of unit injectors Note: A sight glass in the low pressure supply line is helpful in diagnosing air in the fuel. Refer to Testing and Adjusting for more information.
NOTICE https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
4/5
20/6/2015
Búsqueda del medio SENR1054 3408E and 3412E Engines for Caterpillar Built Machines
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
4. Purge air from the low pressure fuel supply circuit. Refer to Operation and Maintenance Manual, "Fuel System Prime" for the correct procedure. 5. Check fuel quality. In temperatures below 0 °C (32 °F), check for solidified fuel (wax). Refer to Special Instruction, SEBD0717, "Diesel Fuels And Your Engine". 6. Check the fuel pressure after the fuel filter while the engine is being cranked. Refer to Testing and Adjusting for the correct pressure values. If the fuel pressure is low, replace the fuel filters. If the fuel pressure is still low, check the following items: fuel transfer pump, fuel transfer pump coupling and fuel pressure regulating valve. Refer to Testing and Adjusting for more information.
Combustion Check for combustion problems. Copyright 1993 2015 Caterpillar Inc. Todos los derechos reservados. Red privada para licenciados del SIS.
Sat Jun 20 2015 13:32:15 GMT0500 (Hora est. Pacífico, Sudamérica) cr460cxa
https://sis.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisweb/mediasearch/mediaheaderinfoframeset.jsp&calledpage=/sisweb/s…
5/5
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