3N8140 OVERSPEED AND AIR SHUT-OFF GROUP Caterpillar parts
3406
Rating:
Alternative (cross code) number:
CA3N8140
3N-8140
3N8140
CA3N8140
3N-8140
3N8140
Weight: 8 pounds 3 kg.
INDUSTRIAL ENGINE,
Compatible equipment models: 3N8140:
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Information:
Probable Causes
Diagnostic codes
Air Intake
Electrical connectors
Fuel supplyRecommended Actions
Diagnostic Codes
Check for any event and active diagnostic codes on the electronic service tool. Troubleshoot any active diagnostic codes or recently logged diagnostic codes before continuing with this procedure.Air Intake
Check the air filter for blockage or restriction.
Check the air intake duct for blockages or restrictions. Electrical Connectors
Check for correct installation of connectors at the following locations:
P1 ECM connector
P2 ECM connector
P532 Fuel rail pump solenoid connector
Refer to Troubleshooting, "Electrical Connectors - Inspect".
Inspect the battery cables from the ECM to the battery compartment. Refer to the Schematic Diagram. Inspect the cables and the power relay. Check the power and ground connections to the ECM. Refer to the schematic diagram for more information.
Select the "Wiggle Test" from the diagnostic tests on the electronic service tool.
Choose the appropriate group of parameters to monitor.
Press the "Start" button. Wiggle the wiring harness in order to reproduce intermittent faults. Note: If an intermittent fault exists, the status will be highlighted and an audible beep will be heard.
Repair any faults and ensure that the symptom has been cleared. If the symptom is still present, refer to "Fuel Supply". Fuel Supply
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.
Visually check the fuel tank for fuel. The fuel gauge may be faulty.
Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).
Check the primary filter/water separator for water in the fuel.
Check for fuel supply lines that are restricted.
Check that the low pressure fuel lines are tight and secured properly.
Check the fuel filters.
Check the diesel fuel for contamination. Refer to Systems Operation, Testing and Adjusting, "Fuel Quality - Test".
Check for air in the fuel system. Refer to Systems Operation, Testing and Adjusting, "Air in Fuel - Test".
Ensure that the fuel system has been primed. Refer to Systems Operation, Testing and Adjusting, "Fuel System - Prime".
Check the fuel pressure. Refer to Systems Operation, Testing and Adjusting, "Fuel System Pressure - Test".
If the fault has not been eliminated, repeat this test procedure from Test Step 1.
Diagnostic codes
Air Intake
Electrical connectors
Fuel supplyRecommended Actions
Diagnostic Codes
Check for any event and active diagnostic codes on the electronic service tool. Troubleshoot any active diagnostic codes or recently logged diagnostic codes before continuing with this procedure.Air Intake
Check the air filter for blockage or restriction.
Check the air intake duct for blockages or restrictions. Electrical Connectors
Check for correct installation of connectors at the following locations:
P1 ECM connector
P2 ECM connector
P532 Fuel rail pump solenoid connector
Refer to Troubleshooting, "Electrical Connectors - Inspect".
Inspect the battery cables from the ECM to the battery compartment. Refer to the Schematic Diagram. Inspect the cables and the power relay. Check the power and ground connections to the ECM. Refer to the schematic diagram for more information.
Select the "Wiggle Test" from the diagnostic tests on the electronic service tool.
Choose the appropriate group of parameters to monitor.
Press the "Start" button. Wiggle the wiring harness in order to reproduce intermittent faults. Note: If an intermittent fault exists, the status will be highlighted and an audible beep will be heard.
Repair any faults and ensure that the symptom has been cleared. If the symptom is still present, refer to "Fuel Supply". Fuel Supply
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.
Visually check the fuel tank for fuel. The fuel gauge may be faulty.
Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).
Check the primary filter/water separator for water in the fuel.
Check for fuel supply lines that are restricted.
Check that the low pressure fuel lines are tight and secured properly.
Check the fuel filters.
Check the diesel fuel for contamination. Refer to Systems Operation, Testing and Adjusting, "Fuel Quality - Test".
Check for air in the fuel system. Refer to Systems Operation, Testing and Adjusting, "Air in Fuel - Test".
Ensure that the fuel system has been primed. Refer to Systems Operation, Testing and Adjusting, "Fuel System - Prime".
Check the fuel pressure. Refer to Systems Operation, Testing and Adjusting, "Fuel System Pressure - Test".
If the fault has not been eliminated, repeat this test procedure from Test Step 1.
Caterpillar SIS machinery equipment:
Parts overspeed Caterpillar catalog:
6L1893
OVERSPEED SAFETY CONTACTOR GROUP
G342C, G353D, G379, G398
G342C, G353D, G379, G398
7L7366
OVERSPEED SAFETY CONTACTOR GROUP
D342, D342C, D353C, D379, D398, D399, G342C, G353D, G379, G398, G399
D342, D342C, D353C, D379, D398, D399, G342C, G353D, G379, G398, G399