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| Illustration 1 | g01193368 |
(1) Front steering position sensor (2) Sensor actuator arm | |
The following position sensors are associated with the auxiliary hydraulic system:
- Front steering position sensors
- Rear steering position sensors
- Rotor depth position sensors
These sensors provide input signals to the machines main ECM.
Front steering position sensor (1) is located on the left front axle. The sensor is behind a protective cover. This sensor sends a pulse width modulated signal to the ECM.
Sensor actuator arm (2) is connected to the sensor. This arm rides on a set pin which is attached to the axle of the sensor. As the wheel angle increases, the set pin moves the actuator arm. This action rotates the shaft of the sensor. This rotation alters the duty cycle of the pulse width modulated signal that the sensor sends to the machine ECM. The machine ECM reads the input signal of the sensor in order to monitor the position of the front wheels.
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| Illustration 2 | g01193371 |
(3) Protective cover (4) Rear steering position sensor | |
Rear steering position sensor (4) is located under protective cover (3). The sensor is mounted on top of the rear bolster.
The input shaft of the sensor is fixed to the rear wheel. When the steering angle of the rear wheels increases, the shaft of the sensor rotates. This rotation alters the duty cycle of the pulse width modulated signal that the sensor sends to the machine ECM. The machine ECM reads the input signal of the sensor in order to monitor the position of the rear wheels.
The ECM uses the input signals of the front wheel position sensor and the rear wheel position sensor in order to control the rear steering solenoids when the machine is in the "CRAB", "COORDINATED", and "FRONT" steering modes.
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| Illustration 3 | g01193373 |
(5) Protective cover (6) Spring loaded wand | |
The rotor depth sensor is located on the left side of the machine behind protective cover (5) .
The rotor depth sensor provides a pulse width modulated input signal to the machine ECM. The machine ECM uses the rotor depth sensor in order to determine the position of the rotor. When the rotor mode switch is in the "TRAVEL" position, the machine ECM raises the rotor to the preset travel height. When the rotor mode switch is in the "WORK" position, the machine ECM maintains the rotor at the preset depth.
Spring loaded wand (6) which is connected to the sensor, rides on the spacer tube of the chain case. As the rotor depth changes, the spacer tube moves in an arc. The wand follows the movement of the chain case. As the wand moves, the shaft of the rotor depth sensor rotates. This rotation alters the duty cycle of the pulse width modulated signal that the rotor depth sensor sends to the machine ECM.