Header Height Control-System Calibration

System calibration is required for proper operation. The following calibration procedure should be performed annually or if any of the HHC electrical components inside the cab are replaced or the number of row units on the head changes.

Header Height Control-Header Calibration must also be performed annually or whenever system calibration is performed. (See Header Height Control-Header Calibration in this section.)

An assistant will be required to perform this procedure.

(See your John Deere dealer if your tachometer display differs from what is described in this procedure).

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During the following calibration procedure you will be prompted to press fan speed switch (A) to store a calibration value or proceed to the next screen. If the switch is pressed for too long or accidentally pressed twice causing you to "skip" a screen, you must shut off key switch and start the calibration procedure again.

A-Fan Speed Switch

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CAUTION: If you or others become entangled in a unit, serious injury or death can result. Be sure units are disengaged. Keep away from areas which might pinch or crush as units move up and down.

1. Park machine on a flat level concrete surface. Engage parking brake and turn off engine. Turn off all accessories and verify row units start/stop, cleaner start/stop and fan ON/OFF switches are all disengaged.

2. Press and hold up/down switch (A) on tachometer while turning on key and starting engine. Release up/down switch.

3. Tachometer will now be in diagnostic mode as shown.

A-Up/Down Switch

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A-Up/Down Switch

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A-Fan Speed Switch

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NOTE: If you toggle past 0030 you cannot toggle back. You must toggle forward until 0030 is reached again.

A-Up/Down Switch

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8. To change the number of row units on your display, rotate rate response knob (C) until correct number appears.

9. Press fan speed switch (A) to record correct number of row units.

A-Fan Speed Switch
B-00x
C-Rate Response Knob

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11. Rotate all individual row unit height control knobs (potentiometers) on the steering column counterclockwise to the minimum height setting.

12. Press fan speed switch (A) to record minimum voltage of each potentiometer.

NOTE: P-L = Potentiometers Turned Left.

A-Fan Speed Switch

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14. Rotate all individual row unit height control knobs (potentiometers) on the steering column clockwise to the maximum height setting.

15. Press fan speed switch (A) to record maximum voltage of each potentiometer.

NOTE: P-r = Potentiometers Turned Right.

A-Fan Speed Switch

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17. Press fan speed switch (A) to store potentiometer calibration values.

If no errors occurred during calibration procedure, the following will scroll on the display; EOC, E00, number of units on the machine and End.

NOTE: E0C = End Of Check

E00 = No Errors

If an error occurred during calibration procedure, the following will scroll on the display; EOC, Err and End. Repeat calibration procedure if this occurs.

If error occurs again, contact your John Deere dealer.

18. Turn off machine and restart to return header height control system to normal operation mode.

19. Perform header height control-header calibration procedure. (See Header Height Control-Header Calibration in this section.)

A-Fan Speed Switch

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