Conditions that Require Recalibrating
The implement electronic control system must be calibrated in order to obtain optimum performance. The procedure consists of the calibration procedure for the lift lever position sensors and the calibration procedure for the valve. The calibration procedure must be followed in order.
The implement electronic control system must be calibrated when the following conditions exist:
- A new machine is received without a work tool and a work tool is installed.
- A work tool is exchanged and the operator notices a different "feel". This indicates an unacceptable change in hydraulic modulation.
If the machine requires frequent changing of the implement, calibration should be performed with the implement that is used most frequently. This calibration should be used with all other implements.
- The configuration of the lift arm has changed.
- Electronic components and hydraulic components are replaced or components are adjusted. This includes the following examples:
- Replacing the ECM
- Replacing or changing positions of the electro-hydraulic system's valves
- Replacing or changing positions of the solenoid valves
- Replacing a linkage position sensor
- Replacing a control lever
- Changing the position of a lever or changing the position of a linkage position sensor
- Replacing all of the main implement valve
- Replacing part of the main implement valve
- Replacing the ECM
- Attachments have been added. The attachments increase the weight of the system: additional side plates, cutting edges and liners.
Note: The implement electronic control system does not need to be calibrated when the same work tool is removed and installed.
The following troubleshooting guide can be used to identify probable causes of calibration problem and the necessary corrective actions needed. Refer to the appropriate calibration procedure sections. Also, refer to Systems Operation, "Implement Electronic Control System".
Problem 1: The kickout position cannot be set according to the calibration procedure for the solenoid valve in the RAISE and in the LOWER positions. These calibrations are found in the Testing and Adjusting, "Main Control Valve (Electronic Technician) - Calibrate" and Testing and Adjusting, "Main Control Valve (Operator Monitor) - Calibrate".
Probable Cause 1 - Calibration of the lift linkage position sensor is required.
Corrective Action - Refer to Testing and Adjusting, "Position Sensor (Lift Linkage) - Calibrate".
Probable Cause 2 - Input from the lift linkage position sensor is not being read by the ECM.
Corrective Action - Check the options code for the implement ECM.
Problem 2: The value for the duty cycle did not appear in the display when the solenoid valve was being calibrated in the RAISE and in the LOWER positions. These calibration procedures can be found in the Testing and Adjusting, "Main Control Valve - Calibrate".
Probable Cause 1 - Input from the lift linkage position sensor is not being read by the ECM.
Corrective Action - Check the options code for the implement ECM.
Probable Cause 2 - The CAT data link has an open circuit.
Corrective Action - Reconnect the data link.
Problem 3: The "READY" message does not appear in the display when the solenoid valve is being calibrated in the RAISE and in the LOWER positions. These calibrations are found in the Testing and Adjusting, "Main Control Valve - Calibrate".
Probable Cause 1 - The engine speed is too low.
Corrective Action - Increase engine speed to high idle.
Probable Cause 2 - The lift arms are drifting excessively.
Corrective Action - Correct the drift problem.
Problem 4: The lift arms respond immediately to lever movement when the solenoid valve is being calibrated in the RAISE and in the LOWER positions. These calibrations are found in the Testing and Adjusting, "Main Control Valve - Calibrate".
Probable Cause - The lift arms are drifting excessively.
Corrective Action - Correct the drift problem.
Note: Try starting calibration of the lift with the work tool on the ground. Lower the lift arms with the engine at low idle. For lower calibration, fully extend lift cylinders with the engine at low idle before starting calibration.
Problem 5: The "DONE" message does not appear in the display when the solenoid valve is being calibrated in the RAISE and in the LOWER positions. These calibrations are found in the Testing and Adjusting, "Main Control Valve - Calibrate".
Probable Cause - Erroneous data was recorded when the solenoid valve was being calibrated in the RAISE and in the LOWER positions. These calibrations are found in the Testing and Adjusting, "Main Control Valve - Calibrate".
Corrective Action - Turn off the engine. Restart the calibration procedure.
Problem 6: The "READY" message never appeared in the display during the Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Probable Cause - The engine speed is too low.
Corrective Action - Increase engine speed to high idle.
Problem 7: Speed of dump too fast when the calibration is complete. Speed of dump is uncontrollable when the calibration is complete.
Probable Cause - Maximum dump modulation current is too high.
Corrective Action - Decrease the maximum dump modulation current accordingly to the direction in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 8: The speed for the dump cycle is too slow when calibration is complete.
Probable Cause - Maximum dump modulation current is too low.
Corrective Action - Verify the maximum speed of the dump according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 9: Speed of tiltback is too fast when calibration is complete. Speed of tiltback is uncontrollable.
Probable Cause - Maximum modulation current for the tiltback is too high.
Corrective Action - Verify the maximum speed of the tiltback according to the direction in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 10: Speed of tiltback is too slow when calibration is complete.
Probable Cause - Maximum modulation current for the tiltback is too low.
Corrective Action - Verify the maximum speed of tiltback according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 11: Lift speed too fast when calibration is complete. Lift speed is uncontrollable.
Probable Cause - Maximum lift modulation current is too high.
Corrective Action - Verify maximum lift speed according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 12: Lift speed is too slow when calibration is complete.
Probable Cause - Maximum lift modulation current is too low.
Corrective Action - Verify maximum lift speed according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 13: After calibration is complete, the lift lowers too fast when the implement lever is not in the detent position. The lift speed is uncontrollable when the implement lever is not in the detent position.
Probable Cause - Maximum lower modulation current is too high.
Corrective Action - Verify maximum lower speed according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".
Problem 14: After calibration is complete, The lift linkage lowers too slowly when the control lever is not in the FLOAT position. .
Probable Cause - Maximum lower modulation current is too low.
Corrective Action - Verify maximum lower speed according to the directions in Testing and Adjusting, "Maximum Modulation Current To Solenoid Valves - Calibrate".