MacDon FlexDraper FD140 - Adjusting the Sensitivity of the Auto Header Height Control (AHHC) (Gleaner R65;R66;R75;R76

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Figure 3.275: AHHC Console
1. Ensure the header is in auto header height control
(AHHC) mode. This is indicated by the AUTO MODE
LED light (A) displaying a continuous, solid light.
2. The header will lower to the height (ground pressure)
corresponding to the position selected with the height
control knob (B). Turn the knob counterclockwise for
minimum ground pressure, and clockwise for maximum
ground pressure.
Adjusting the Sensitivity of the Auto Header Height Control (AHHC) (Gleaner R65/R66/R75/R76
and Pre-2016 S Series)
NOTE:
Changes may have been made to the combine controls or display since this document was published. Refer to the
combine operator’s manual for updates.
Figure 3.276: Auto Header Height Control Console
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The SENSITIVITY ADJUSTMENT dial (A) controls the distance the cutterbar must travel up or down before the
AHHC reacts and raises or lowers the feeder house.
When the SENSITIVITY ADJUSTMENT dial (A) is set to maximum (turned completely clockwise), only small
changes in ground height are needed to cause the feeder house to raise or lower. In this position, the cutterbar
OPERATION