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4.13 John Deere S and T Series Combines
To make your header’s auto header height control (AHHC) system compatible with John Deere S and T series combines,
you must check the height sensor voltage range, calibrate the feeder house speed, calibrate the AHHC system to ensure
that it is working correctly, and adjust the sensitivity and cutting height presets.
4.13.1 Checking Voltage Range from Combine Cab (John Deere S and T Series)
To ensure that the auto header height control (AHHC) system on your header works correctly with your John Deere S or T
series combine, the output voltage from the header height control sensors must be verified.
The auto header height sensor output must be within a specific range, or feature will not work properly.
NOTE:
Changes may have been made to the combine controls or the display since this document was published. For instructions,
refer to the combine operator’s manual for updated information.
DANGER
Check to be sure all bystanders have cleared the area.
1. Raise the header until its wheels are 150 mm (6 in.) above the ground.
Figure 4.167: John Deere Combine Display
2. Press CALIBRATION icon (A) on the main page of the
combine display. The CALIBRATION page appears.
Figure 4.168: John Deere Combine Display
3. Press DIAGNOSTIC READINGS icon (A) on the CALIBRATION
page. The DIAGNOSTIC READINGS page appears. This page
provides access to calibration procedures, header options,
and diagnostic information.
AUTO HEADER HEIGHT CONTROL
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