3C8652 LIFT GP Caterpillar parts
Rating:
Alternative (cross code) number:
CA3C8652
3C-8652
3C8652
CA3C8652
3C-8652
3C8652
Weight: 1465 pounds 664 kg.
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Information:
Probable Causes
Customer specified parameters
Cold mode
Torque limit switch
Electronic system
Vehicle speed signal
Power train data link
Fuel supply
Air Inlet and exhaust system
Malfunction of an individual cylinder
Low injection actuation pressure
Derate from the monitoring system for the diesel particulate filter (if equipped)Recommended Actions
Customer Specified Parameters
Establish communication between the Caterpillar Electronic Technician (Cat ET) and the engine Electronic Control Module (ECM).
Check the "Engine Monitoring Mode" parameter.
Check the value of the "Engine Monitoring Mode" parameter. If the parameter is programmed to "Derate", the ECM will derate the engine when certain problems occur. The derate is normal operation. Refer to Troubleshooting, "Caterpillar Engine Monitoring" for additional information.
Check the following parameters:
"Rating Number"
"Top Engine Limit"
"Vehicle Speed Limit"
"Lower Gears Engine RPM Limit"
"Intermediate Gears Engine RPM Limit"
"Gear Down Protection Engine RPM Limit"
Set each parameter to the maximum value one at a time and determine whether the problem is corrected.Cold Mode
Note: Cold mode is normal operation if the problem occurs only after start-up in cold weather.Monitor the status screen on Cat ET in order to verify that the engine has exited cold mode. An active cold mode is indicated in the upper corner of any status screen.Torque Limit Switch
Check the setting for the "Torque Limit" parameter.If the "Torque Limit" is programmed below 2712 N m (2000 lb ft), check the status screen for the torque limit switch. Ensure that the status screen indicates that the torque limit switch is OFF. If the status of the torque limit switch is ON and a "Torque Limit" is programmed, the system is operating correctly. If the switch that is connected to this signal input is not switching on and switching off, refer to Troubleshooting, "PTO Switch Circuit - Test".Electronic System
Monitor the Fuel Position, the Rated Fuel Limit and the Fuel Limit for the Fuel Ratio Control (FRC).While the vehicle is operating under full load, the parameters should meet the following conditions:
The fuel position is equal to the rated fuel limit.
The fuel position is less than the FRC limit.If the fuel position is equal to the rated fuel limit and the fuel position is less than the FRC limit, the electronics are operating correctly. Proceed to "Vehicle Speed Signal".
If the fuel position is not equal to the rated fuel limit and/or the fuel position is not less than the FRC limit, perform the following procedure:
When the engine is off, turn the keyswitch to the ON position.
Check the boost pressure on the status screen. The correct boost pressure is 0 kPa (0 psi).Accelerator Pedal Position
Monitor the status of the accelerator pedal position sensor. Operate the engine at high idle with the vehicle in neutral.If the engine cannot reach the programmed top engine limit, check the duty cycle of the accelerator pedal position sensor. Ensure that the duty cycle of the accelerator pedal position sensor is within calibration (75 to 90 percent at high idle).If the accelerator pedal position is unstable, check the duty cycle of the accelerator pedal position sensor. Slowly operate the accelerator pedal in order to verify that the accelerator pedal position sensor is within
Customer specified parameters
Cold mode
Torque limit switch
Electronic system
Vehicle speed signal
Power train data link
Fuel supply
Air Inlet and exhaust system
Malfunction of an individual cylinder
Low injection actuation pressure
Derate from the monitoring system for the diesel particulate filter (if equipped)Recommended Actions
Customer Specified Parameters
Establish communication between the Caterpillar Electronic Technician (Cat ET) and the engine Electronic Control Module (ECM).
Check the "Engine Monitoring Mode" parameter.
Check the value of the "Engine Monitoring Mode" parameter. If the parameter is programmed to "Derate", the ECM will derate the engine when certain problems occur. The derate is normal operation. Refer to Troubleshooting, "Caterpillar Engine Monitoring" for additional information.
Check the following parameters:
"Rating Number"
"Top Engine Limit"
"Vehicle Speed Limit"
"Lower Gears Engine RPM Limit"
"Intermediate Gears Engine RPM Limit"
"Gear Down Protection Engine RPM Limit"
Set each parameter to the maximum value one at a time and determine whether the problem is corrected.Cold Mode
Note: Cold mode is normal operation if the problem occurs only after start-up in cold weather.Monitor the status screen on Cat ET in order to verify that the engine has exited cold mode. An active cold mode is indicated in the upper corner of any status screen.Torque Limit Switch
Check the setting for the "Torque Limit" parameter.If the "Torque Limit" is programmed below 2712 N m (2000 lb ft), check the status screen for the torque limit switch. Ensure that the status screen indicates that the torque limit switch is OFF. If the status of the torque limit switch is ON and a "Torque Limit" is programmed, the system is operating correctly. If the switch that is connected to this signal input is not switching on and switching off, refer to Troubleshooting, "PTO Switch Circuit - Test".Electronic System
Monitor the Fuel Position, the Rated Fuel Limit and the Fuel Limit for the Fuel Ratio Control (FRC).While the vehicle is operating under full load, the parameters should meet the following conditions:
The fuel position is equal to the rated fuel limit.
The fuel position is less than the FRC limit.If the fuel position is equal to the rated fuel limit and the fuel position is less than the FRC limit, the electronics are operating correctly. Proceed to "Vehicle Speed Signal".
If the fuel position is not equal to the rated fuel limit and/or the fuel position is not less than the FRC limit, perform the following procedure:
When the engine is off, turn the keyswitch to the ON position.
Check the boost pressure on the status screen. The correct boost pressure is 0 kPa (0 psi).Accelerator Pedal Position
Monitor the status of the accelerator pedal position sensor. Operate the engine at high idle with the vehicle in neutral.If the engine cannot reach the programmed top engine limit, check the duty cycle of the accelerator pedal position sensor. Ensure that the duty cycle of the accelerator pedal position sensor is within calibration (75 to 90 percent at high idle).If the accelerator pedal position is unstable, check the duty cycle of the accelerator pedal position sensor. Slowly operate the accelerator pedal in order to verify that the accelerator pedal position sensor is within