- The Implement lockout switch is LOCKED
- Restrictions in oil lines
- Leaks at fittings and connections of hydraulic lines or hoses
- Blockage of the main suction hose
- Damaged control handle and/or the position sensor
- Worn piston seals and/or the lift cylinders
- Damaged main control valve
- Sticky makeup valve
- Damaged load check valve
Check the monitoring system for any fault codes that are related to the ripper function or the blade function.
Refer to Table 1.
| Event Codes | ||
| Code and Description | Conditions which Generate this Code | Recommended Response |
| E467(1) Blade Lift Control Out of Neutral at an Inappropriate Time | The control was active when the engine was started. The implement system was turned on. | Release the handle for the blade. Ensure that the handle is in the neutral position. If the event continues to occur, test the handle. |
| E468(1) Blade Tilt Control Out of Neutral at an Inappropriate Time | The control was active when the engine was started. The implement system was turned on. | Release the handle for the blade. Ensure that the handle is in the neutral position. If the event continues to occur, test the handle. |
| E472(1) Ripper In/Out Control Out of Neutral at an Inappropriate Time | The control was active when the engine was started. The implement system was turned on. | Release the handle for the ripper. Ensure that the handle is in the neutral position. If the event continues to occur, test the handle. |
| E473(1) Ripper Lift Control Out Of Neutral At Inappropriate Time | The control was active when the engine was started. The implement system was turned on. | Release the handle for the ripper. Ensure that the handle is in the neutral position. If the event continues to occur, test the handle. |
| E474(1) Ripper Autostow Switch Depressed at an Inappropriate Time | The control was active when the engine was started. The implement system was turned on. | Press the switch when the ripper is ready. |
Note: Care must be taken in order to ensure that fluids are contained during inspection, maintenance, testing, adjusting, and repair of the machine. You must be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component that contains fluid. Dispose of all fluids according to local regulations.
Ensure that the implement lockout switch is not in the LOCKED position.
Refer to Operation and Maintenance Manual, SEBU8200, "Operator Controls".
Restrictions in the oil lines may prevent the flow of oil to the hydraulic components. Components cannot operate without oil flow from the pump. Components cannot operate properly with reduced flow or pressure.
Check for restrictions on all hydraulic oil hoses, lines, and tubes in the system and in the circuit with faulty operation. Correct any problems that are found. Retest the hydraulic system.
Leaks at Fittings and Connections of Hydraulic Lines or Hoses
Leaks at fittings and other types of hydraulic line connections can cause loss of oil flow. Loss of oil flow will prevent components from attaining oil pressures that are necessary to perform work. Pressure losses may cause the operator to complain of a weak machine. Leaks at fittings and connections on the pressure side of pumps are a direct source of oil loss in the system, which can lead to component failure if the low oil levels are not monitored and pumps and motors are starved of oil. Leaks at fittings and connections on the suction side of pumps are a direct source of oil aeration. Oil aeration can cause damage to components (cavitation) which can create excess or unusual noise.
Check for leaks at all fittings and connections of hydraulic oil hoses, lines, and tubes in the system in question. Correct any problems that are found. Retest the hydraulic system.
Blockage of the Main Suction Hose
Blockages or restrictions in the suction for the main oil line will stop the supply of hydraulic oil flow to the pumps. Components cannot operate without oil flow from the pump. Components cannot operate properly with reduced flow or pressure. Correct any problems that are found. Retest the hydraulic system.
The Base Assembly is Damaged or Worn
If the mechanical connections between the blade control handle and the position sensors for the base become damaged or worn, the operator will not have precise control over the movement of the blade. This condition will cause undesirable operating results.
In order to test for this condition, follow the steps below:
- Turn the key for the machine to the ON position. Do not start the engine.
- With the Message display or Cat ET, access the data for the status of the "Blade Control Handle Raise/Lower Position Sensor".
- Move the handle for the blade slowly forward. Move the handle slowly rearward. Monitor the duty cycle from the position sensor. Note whether the handle moves without a resulting change in the duty cycle. Move the blade control handle to all the extreme positions. Record the duty cycle of the sensors at the different positions. Compare the duty cycle that is displayed for the base assembly for the base to the specifications for the base.
If the duty cycle is outside of the specification, the base assembly must be replaced.
If these sensors are not properly calibrated, the sensors may be sending incorrect signals to the ECM, that results in operational problems or generating faults and/or events.
Recalibrate the Raise/Lower position sensor.
Refer to Testing and Adjusting, "Calibration" in this manual.
Perform the calibration for the "Blade Control Handle".
Enter the service password and go to "Service/Calibrations/Steering Calibrations/Blade Control Handle".
This procedure will calibrate both the Tilt and the Raise/Lower position sensors in order to allow the Implement ECM to properly interpret the signals from the sensors.
If the base assembly has been calibrated and no other electrical problems are found, the base assembly must be replaced.
The Piston Seals and/or the Lift Cylinder are Worn
Refer to Testing and Adjusting, "Operational Checks (Hydraulic System)" in this manual.
The Main Control Valve is Contaminated or Damaged
Refer to Testing and Adjusting, "Calibration" in this manual.
Refer to Testing and Adjusting, "Operational Checks (Hydraulic System)" in this manual.
The Load Check Valve is not Closing
Refer to Testing and Adjusting, "Operational Checks (Hydraulic System)" in this manual.
A damaged load check valve will cause a delay in the movement of the implement.
If the load check valve is stuck open, an orifice effect may be created. The orifice effect will slow the flow of oil through the control valve. This will cause slower cylinder speeds. This may cause the blade to drop slightly after it has been positioned.
- Release all pressure from the hydraulic system.
- Remove the load check valve from the lift control valve.
- Examine the operation of the load check valve and ensure that the valve moves freely and that the valve is capable of opening and closing completely.
If any contaminants are present, thoroughly clean the components. Determine if the entire control valve needs to be cleaned. Contaminants may cause the valve to stick. If the load check valve is damaged, replace the valve.
- Reinstall the load check valve into the control valve body. Retest the equipment.