Calibrating Wheel Speed Sensor

NOTE: Radar sensor overrides wheel speed sensor when radar sensor is installed. If using radar sensor, operator should calibrate wheel speed sensor for precautionary reasons. When calibrating wheel speed sensor, disconnect radar sensor and install dust cap with jumper wire on wiring harness.

When using wheel speed sensor, the radar symbol SHOULD NOT appear on line A of RUN pages one or two.

1. Fill the solution tank half full of water or solution.

2. Measure a 122 m (400 ft) course with tape measure on flat terrain that is most typical of field conditions (loose, medium, hard-packed).

3. Mark both beginning and end of course with markers that are visible from cab.

4. Allow enough room at each end of course for sprayer to travel entire course without speeding up or slowing down.

5. Select the desired speed range (1st, 2nd) which spraying will most likely occur.

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6. Press "SETUP" to display SETUP menu.

7. Press "A" to setup sprayer.

8. Press "PAGE" to display sprayer SETUP Page 2.

9. Press "B" to calibrate sprayer.

10. Press "C" for Wheel Speed Sensor.

11. Verify that calibration value is within specified calibration ranges for tires below.

12. If calibration value is not within range, enter a value within range.

13. Start driving somewhere before beginning of the course and reach speed at which spraying will most likely occur.

14. While maintaining that speed, press "C" to turn wheel counter ON when the sprayer reaches the beginning of the course.

15. Keep constant speed over the course, and when sprayer reaches the end marker, press "C" to turn counter OFF.

16. Record calibration value that appears on line E.

17. Repeat steps 13-15 two more times and record calibration values.

18. Average the three calibration values.

19. Press "E", enter calibration average, and press "E" again.

20. To verify calibration value, measure the course with the distance counter. (See OPERATING DISTANCE COUNTER in this section.)

21. If the "Distance" is anything more or less than 120-123 m (395-405 ft), refine the previous wheel calibration number as follows:

Wheel Calibration Number x Recorded distance ÷ by 122 m (400 ft) = New Wheel Calibration Number

N42184GX
N42173NP

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22. Enter new wheel calibration number.

23. Repeat Steps 20 and 21 if necessary.

Calibration value ranges:

Standard/Narrow Tires: 80-92

Flotation Tires:

  • 23.1-26: 77-89

NOTE: If radar was disconnected, connect after completing calibration of wheel speed sensor.

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