PLUG-DRAIN 4B7739 - Caterpillar

Illustration 1 g00614752
System Schematic For Unexpected ShutdownNote: A slave relay is used only for 3500 engines with the 2301A Governor and no fuel shutoff solenoid.
Illustration 2 g00614755
Fuel Control Relay For ETR SystemsNote: For 3408 and 3412 engines, the AFCR should be connected to SR terminal 87 instead of the fuel solenoid. The AFCR should be provided with F16.
Illustration 3 g00614757
Fuel Control Relay For ETS SystemsThe engine does not shut down when a shutdown fault occurs.
Check for any diagnosed faults.
Check the display area of the GSC for a fault indicator that is FLASHING. Check for a diagnostic code on the upper display.Note: If the fault alarm indicator is ON CONTINUOUSLY, then the GSC is programmed to override the normal shutdown response and the GSC is programmed to treat the condition as an alarm fault. The engine continues to run and the engine is able to start. This is not a problem. To view the setpoints, see Systems Operation, "Engine/Generator Setpoint Viewing OP2". To reprogram the setpoints, see Systems Operation, "Engine/Generator Programming OP5".Expected Result: The engine does not shut down when a shutdown fault occurs.Results:
Not OK - If all fault indicators are OFF and a fault exists that should cause the GSC to shutdown the engine, then proceed to 13.
Not OK - If the fault shutdown indicator is FLASHING and the engine remains running. For ETR fuel systems, proceed to 2. For ETS fuel systems, proceed to6. For 3500 engines with a electronic governor, proceed to 12.
System check.The engine remains running and the fault shutdown indicator is FLASHING.
Turn the ECS to OFF/RESET.Expected Result: The engine should shut down.Results:
OK - The engine shuts down. The system is functioning properly. Start the engine again. If the fault shutdown indicator is FLASHING and the engine does not shut down, replace the GSC. See Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace". STOP.
Not OK - The engine does NOT shut down. Proceed to 3.
System check.The engine remains running and the fault shutdown indicator is FLASHING.
Push the emergency stop push button (ESPB).Expected Result: The engine should shut down.Results:
OK - The engine shuts down. Therefore, an unwanted voltage is present at RM-15 of the relay module. Check the related wiring for this unwanted short. If no short to ground (B-) is found in the related wiring, then replace the relay module. See Testing And Adjusting, "Relay Module - Replace". STOP.
Not OK - The engine does NOT shut down. Proceed to 4.
ETR System Check (continued). The engine remains running and the fault shutdown indicator is FLASHING.
Stop the engine. Turn the battery disconnect switch to OFF.
Remove all wires from terminal TS1-7 in the generator housing.
Turn the ECS to START and attempt to start the engine. Expected Result: The engine should NOT start. Results:
OK - The engine does not start. There is a error in the wiring or there is a short to +battery between TS1-7 and the relay module. On 3408 and 3412 engines, the auxiliary fuel control relay (AFCR) on the subpanel could be