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| Illustration 1 | g06000245 |
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Right Side of Instrument Panel (Left Panel Shown) (1) Maneuver mode indicator (2) Pave mode indicator (3) Travel mode indicator (4) Propel mode switch (5) Trigger (6) Propel lever (7) Parking brake switch (8) Parking brake indicator (9) Propel speed dial (10) Front-wheel assist switch (11) Front-wheel assist indicator (12) Front-wheel assist dial | |
The left and right operator stations on the tractor are identical. Only one of the operator stations can be active at any given time. The following information describes the left instrument panel. The description also applies to the right instrument panel.
The operator station contains four keypads. The lower right keypad contains propel system components. Each component on this keypad generates an output signal. These signals are broadcast to the machine control system through the CAN "C" lines. The machine electronic control system uses these signals to determine the desired operating conditions.
Propel mode switch (4) is a push-button switch. Only the switch on the active instrument panel is operational. When the operator actuates the active switch, the transmission ECM toggles the propel mode between "maneuver", "travel", and "Pave" .At machine start-up, the system enters the propel mode that was active during the last engine shutdown.
When the propel mode is set to "Pave", pave mode indicator (2) is illuminated. When the propel mode is set to "maneuver", maneuver mode indicator (1) is illuminated. When the propel mode is set to "travel", travel mode indicator (3) is illuminated.
Propel speed dial (9) and propel lever (6) on the active instrument panel are operational. The target machine speed is set by the propel speed dial. The propel lever determines the desired travel direction and desired percent of the target speed.
Propel speed dial (9) does not have rotational end points and will continuously rotate in either direction. Each propels speed dial operates an encoder. At machine start-up, the system sets the target machine speed to the level that was active during the last engine shutdown.
Clockwise rotation of the propel speed encoder increases the target speed to a maximum. Counterclockwise rotation of the encoder decreases the target speed to zero. If the operator transfers the operator station control, the propel speed encoder assumes the state of the encoder on the originating operator station.
The center position of propel lever (6) is the NEUTRAL position. If the lever is out of the NEUTRAL position at machine start-up, the control system prevents the machine from moving. The lever must be returned to the NEUTRAL position to dismiss this override.
The propel lever is equipped with interlock trigger (5). The operator must actuate this trigger before the lever is moved out of the NEUTRAL position. When the trigger is actuated and the lever is moved toward the front of the machine, the target machine direction is set to "forward". When the trigger is actuated and the lever is moved toward the rear of the machine, the target machine direction is set to "reverse".
The desired percent of the target speed is proportional to position of propel lever (6). Once the lever is out of the NEUTRAL position, the operator can change the desired percent of the target speed without actuating the interlock trigger. However, the operator must actuate the trigger to change the desired direction.
Parking brake switch (7) is a push-button switch. Only the switch on the active instrument panel is operational. When the operator actuates the active switch, the transmission ECM toggles the status of the parking brake between "engaged" and "released". The status defaults to "engaged" at machine start-up.
When the parking brake status is set to "engaged", parking brake indicator (8) on both operator stations is illuminated. The parking brake indicator flashes if the requested parking brake status is not allowed under the current operating conditions. The indicator will flash in the following two circumstances. The operator attempts to disengage the parking brake when the engine is not operating. The propel lever is out of the NEUTRAL position when the parking brake status is set to "engaged".
If the operator transfers the operator station control, the newly active station assumes the parking brake state of the originating operator station.
The lower right keypad is equipped with a front-wheel assist dial (12) and front-wheel assist switch (10). The dial and switch are installed on all machines. These components are not active if the machine is not equipped with front-wheel assist. On machines with front-wheel assist, only the dial and switch on the active instrument panel are operational.
Front-wheel assist dial (12) does not have rotational end points and continuously rotates in either direction. When the front-wheel assist system is on, the setting of the front-wheel assist dial is shown on the operator displays.
Front-wheel assist switch (10) is a push-button switch. When the operator actuates the switch on the active panel, the transmission ECM toggles the status of the front-wheel assist system between "off" and "on". The status is retained across a key cycle. When the front-wheel assist system is set to"on" , front-wheel indicator (11) on both operator stations is illuminated.
Each front-wheels assist dial (12) operates an encoder. The transmission ECM monitors the input from the active front-wheel assist encoder. The input signal from the encoder is stored in memory, and the last active value is retained across an engine off and on cycle.
The transmission ECM uses the input from the front-wheel assist encoder as one of the control parameters for the front-wheel assist solenoid. If all front-wheel assist parameters have been met, clockwise rotation of the encoder increases the torque of the front wheels to a maximum. Counterclockwise rotation of the encoder decreases the torque of the front wheels to zero. If the operator transfers the operator station control, the front-wheel assist encoder assumes the state of the encoder on the originating operator station.
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| Illustration 2 | g06000659 |
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Right Operator Display (13) Operator display (14) Machine direction icon (15) Actual machine speed (16) Target machine speed | |
Each instrument panel is equipped with operator display (13). The display communicates with the ECMs on the machine through CAN "A" . When the display is on the operator screen, the upper information banner shows propel and steering data.
Machine direction icon (14) indicates the target machine direction. Actual machine speed (15) is shown to the right of the machine direction icon. Target machine speed (16) is shown to the right of the target icon. In the maneuver and pave modes, speed is displayed in meters per minute or feet per minute. In travel mode, speed is displayed in kilometers per hour or miles per hour. Machine speed units depend on the display units chosen.
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| Illustration 3 | g06000650 |
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Set Hill Mode (17) Machine icon (18) Operator screen (19) Machine screen (20) Settings screen (21) Propel screen (22) Hill Hold screen | |
The machine control system is programmed with hill-mode logic. This logic prevents the machine from rolling backwards on steep inclines during the transition between neutral and forward while in pave mode.
The operator can use the display to enable or disable the hill-mode logic. When this logic is enabled, the transmission ECM does not release the parking brake until one of the following conditions are met:
- The propel calibration offset current is achieved.
- The duration of the rollback brake timer has elapsed.
Hill-mode logic allows the pressure in the propel circuit to increase before the parking brake is released. Since this action increases wear on the parking brake, the feature should only be enabled while the machine is paving on steep slopes.
To change the status of the hill-mode logic, the operator must first tap machine icon (17) on operator screen (18). Then, "Settings" must be tapped on the "Machine" screen (19), and "Propel" must be tapped on the "Settings" screen (20). When "Hill Hold" is tapped on the "Propel" screen (21), the operator can tap "Enable" or "Disable" on the "Hill Hold" screen (22). A tap of the "OK" icon on the "Hill Hold" screen saves the currently selected mode.
Note: The up and down arrows on the right side of the screen allow the operator to highlight the available options. The "OK" icon confirms the selected option.
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| Illustration 4 | g06000637 |
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Bottom of Left Operator Panel (23) Left propel override switch (24) Right propel override switch | |
The machine is equipped with one left propel override switch (23) and one right propel override switch (24). A cover (shown removed) on the rear of the left operator control console provides access to these switches. These switches can be used to move the machine if there was an ECM failure. A decal indicates the switch positions.
The propel override switches are momentary toggle switches with three positions. The top position of each switch is the FORWARD position. The bottom position of each switch is the REVERSE position. The propel override switches will spring return to the center HOLD position from the FORWARD position and from the REVERSE position.
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| Illustration 5 | g06000560 |
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Base of Left Operator Station (25) Decelerator pedal (26) Decelerator sensor | |
The machine can be equipped with two optional decelerator pedals (25). One decelerator pedal is at the base of the left operator station (shown), and the other is at the base of the right operator station. Only the pedal on the active operator station is operational.
Decelerator pedal (25) provides a modulated reduction in machine speed. As the pedal is depressed, the machine speed decreases. When the pedal is depressed completely, the parking brakes are engaged, and the machine will not move.
Decelerator sensor (26) is at the base of each decelerator pedal (25). The machine electronic control system uses the signal from the active decelerator sensor as one of the control parameters to calculate the desired machine speed.