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| Illustration 1 | g02475746 |
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Partial schematic for the Implement Lockout Solenoid and Switch | |
The Implement Lockout feature is used to deactivate the supply of hydraulic pilot oil to the implement system. The Implement Lockout solenoid is energized during normal machine operation. The pin puller assembly will operate regardless of the implement lockout feature.
The solenoid is de-energized when the operator places the Implement Lockout switch in the LOCKED position. This action will block supply oil to the manifold. No pilot pressure will be available for initiating movement of the blade or the rear implement.
Ensure that this switch is in the LOCKED position when the following conditions exist:
- The operator is exiting the machine.
- The machine is being serviced.
- The machine is left unattended.
The implement lockout solenoid is temporarily deactivated if the engine speed is less than or equal to 300 rpm. The Implement ECM will automatically activate the lockout solenoid if the following conditions are present:
- The implement lockout switch is not locked.
- The speed of the engine is greater than 500 RPM.
Note: The Implement ECM will also automatically reactivate the Lockout solenoid if an implement receives a command and the lockout switch unlocked. The Implement Lockout Solenoid is disabled if the Implement ECM detects a diagnostic code for the implement lockout switch. The Implement Lockout solenoid is also de-energized if the Implement ECM detects a short to the battery on any of the implement solenoids.
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| Illustration 2 | g02349002 |
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Operator Present Switch connections | |
The presence of the operator is communicated via the Operator Presence Pressure Switch that is located in the base of the operator seat. The Machine ECM communicates the operator present status to the Implement ECM. When an operator is not present in the seat, all implement hydraulic functions will be locked out.
At initial machine start-up, the Machine ECM will monitor the signal for the Operator Presence Sensor. The ECM will not enable machine travel system or the implement control system if the sensor is indicating that there is not an operator present in the seat. Once the sensor indicates that an operator is present in the seat, the Machine ECM will enable the operation of the machine travel system and the implement control system.
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| Illustration 3 | g02461336 |
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Winch Lockout Switch | |
The Winch Lockout switch is located on the right-hand console. The Winch Lockout switch is present in the cab only when the machine is configured with a winch for the rear attachment. In the locked position, the Winch Lockout switch will lock out all of the functions of the winch. To perform any operation with the winch, the Winch Lockout switch must be in the Unlocked position.
Note: If a short to battery condition exists on any implement solenoid, the winch will be locked out regardless of the position of the Winch Lockout switch.
The Winch Low Speed Lock switch is located on the joystick handle for the winch. The Winch Low Speed Lock switch may be used to toggle the winch in and out of low speed mode.
Hydraulic Oil Temperature Sensor
The Implement ECM monitors the hydraulic oil temperature for the implements with a temperature sensor. The oil temperature is displayed in the monitoring system and with the service tool. If the hydraulic oil temperature is high, the implement ECM will trigger an event code with a level 2 or a level 3.
The ripper auto stow function allows the operator to perform other tasks while the ripper is automatically stowed. The operator can press the ripper auto stow switch, rather than holding the ripper lift control lever. The operator can activate the auto stow function so that the ripper will automatically raise to the fully up position. The ripper shank can then be extended or retracted by the operator. The configuration for the auto stow function can be stored in the profile for the operator. Refer to Service Manual, SEBU8200, "Monitoring System" for information about operating the ripper auto stow function.
Note: Operating the rear implement control while the ripper auto stow function is operating will cause the ripper auto stow function to stop. The control will then return to manual control.
The Controls Active Test is designed to prevent unexpected movement of the implements. The test is initiated when any of the following conditions occur:
- Transition of the key start switch from the OFF to the ON position
- Cranking of the engine
- The lockout switch for the implement changed from the LOCKED to NOT LOCKED position.
- After calibration or after diagnostic test
- Whenever diagnostic codes cannot be detected for the controls
The Controls Active Test will test the handle for blade control and the handle for the rear implement control. The Controls Active Test will ensure that the handle for the blade control and the handle for the rear implement control are in the HOLD position. Any movement of the controls for the blade or the controls for the rear implement that occurs during the Controls Active Test will disable the test. The test will not continue until that handle is returned to the HOLD position.
The following controls are tested during the Controls Active Test:
- Blade handle raise/lower position sensor
- Blade handle tilt left/right position sensor
- Blade thumb roller position sensor (Dual Tilt Only)
- Winch handle spool in/out position sensor
- Ripper handle raise/lower position sensor
- Ripper shank in/out position sensor
- Winch handle drum release position sensor
- Auxiliary 1 handle position sensor
- Auxiliary 2 handle position sensor
- Auxiliary 3 handle position sensor
- Ripper auto stow function switch
- Low speed lock switch
The following conditions will cause the Controls Active Test to fail:
- The blade control handle is not in the HOLD position.
- The control handle for the rear implement is not in the HOLD position.
Auto And Manual Blade Control (Single Tilt)
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| Illustration 4 | g01916037 |
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Blade control lever (1) Mode switch (2) Switch (Increment) (3) Switch (Decrement) | |
Note: Buttons (1), (2), and (3) are for AccuGrade functionality only.
Push the left push button (1) on the blade control handle to change between the auto mode and the manual blade mode. If the auto option is active, press the top push button (2) on the blade control handle to increment the height of the blade, or press the bottom push button (3) on the blade control handle to decrement the height of the blade.
Auto And Manual Blade Control (Dual Tilt)
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| Illustration 5 | g02475865 |
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Blade control lever (1) Mode switch (2) Switch (Increment) (3) Switch (Decrement) (4) Thumb Roller | |
Note: Buttons (1), (2), and (3) are for AccuGrade functionality only.
Push the left push button (1) on the blade control handle to change between the auto mode and the manual blade mode. If the auto option is active, press the top push button (2) on the blade control handle to increment the height of the blade, or press the bottom push button (3) on the blade control handle to decrement the height of the blade.
Pitching the blade forward and backward is controlled by the position sensor that is located on the thumb roller (4) of the blade control handle.
The Implement Control controls the motion of the blade and/or the motion of the rear attachment. This motion is commanded with the control handle that is located in the cab.
Implement System Limp Home Mode
The Limp Home Mode is a function of the Implement Electronic Control System. The Limp Home Mode will allow the Implement ECM to override the blade control handle and the rear implement control handle to enable limited control of the blade and rear implement functions.
When the blade or rear implement operation is disabled by the Implement ECM due to an active diagnostic condition, the operator can activate the Limp Home Mode with the Message display and the keypad that are located in the Message Display .
The implement system Limp Home Mode will be activated by the operator with the procedure that follows:
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| Illustration 6 | g01518880 |
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A Typical Limp Home Mode sequence of menus for controlling an implement | |
- From the Limp Home Mode menu, the operator can use the UP key or the DOWN key on the four way button to scroll through the functions for the blade and the rear implement. Press "OK" to select the function that needs to be activated.
- Once a blade or a rear implement function is selected, the selected function will be displayed. Follow the instructions that are displayed to use the UP key or the DOWN key to operate a selected blade or a selected rear attachment.
- When the UP key or the DOWN key is pressed, the selected implement will move incrementally in the direction that is selected. The key must be pressed repeatedly to move the implement through a full range of travel.
- The operator can use the return key to select another blade or another function for the rear attachment. The blade or the rear attachment can only be operated when the selected function is displayed.
- To disable the implement Limp Home Mode, the operator can return to any other menu at any time.
Hazardous Voltage System Energized Indicator
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| Illustration 7 | g02475879 |
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Hazardous Voltage System Energized Indicator located under the access cover on the upper left fender of the machine. (5) Hazardous Voltage System Energized Indicator | |
The machine is equipped with a Hazardous Voltage System Energized Indicator (HV Present Indicator). The operation of the HV Present Indicator is controlled by the Accessory Power Converter (APC). The APC will use a sinking driver output to control the operation of the HV Present Indicator.
The HV Present Indicator will operate regardless of the state of the key start switch and the ground disconnect switch.
The HV Present Indicator is used for several different functions as a system status indicator. The indicator is used to indicate the status of the following functions:
- DC System Voltage Indicator
- Low voltage diagnostic power supply status
- Accessory Power Converter System status