MacDon FFT FlexDraper FD75 - Auto Header Height Control (AHHC)

OPERATION
3.8 Auto Header Height Control (AHHC)
MacDon’s Auto Header Height Control (AHHC) feature works in conjunction with the AHHC option available on
certain combine models.
A sensor is installed in the float indicator box (A) on the CA25 Combine Adapter. This sensor send a signal to
the combine allowing it to maintain a consistent cutting height and an optimum adapter float as the header follows
ground contours.
Figure
3.93: CA25 Combine Adapter
CA25 Combine Adapters are factory-equipped for AHHC; however, before using the AHHC feature, you must do
the follo wing:
1. Ensure that the AHHC sensor ’s output voltage range is appropriate for the combine.
For more information, refer to 3.8.1 Auto Header Height Control Sensor Output Voltage Range – Combine
Requirements, page 91.
2. Prepare the combine to use the AH H C feature (applies only to some combine models—refer to the instru ctions
for your combine).
3. Calibrate the AHHC system so that the combine can correctly interpret d ata from the height sensor on the
combine adapter (refer to the instructions for your combine).
NOTE:
Once calibration is complete, you are ready to use the AHHC feature in the field. For eac h combine,
certainoperationsettingscanbeusedtoimprovetheperformanceoftheAHHCfeature(refertothe
instructions for your combine).
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