214323 199 Revision B
Figure 4.139: Auto Header Height Control Console
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 SENSITIVITY ADJUSTMENT dial (A) is set to the maximum value (i.e. is 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 moves up
and down approximately 19 mm (3/4 in.) before the control module signals the hydraulic control valve to raise or lower the
header frame.
When SENSITIVITY ADJUSTMENT dial (A) is set to the minimum value (i.e. is turned completely counterclockwise), large
changes in ground height are needed to cause the feeder house to raise or lower. In this position, the cutterbar moves up
and down approximately 51 mm (2 in.) before the control module signals the hydraulic control valve to raise or lower the
header frame.
The HEADER SENSE LINE input changes the range of sensitivity. When connected to a draper header, the counterclockwise
(i.e. the least sensitive) position allows for approximately 102 mm (4 in.) of vertical travel before the AHHC intervenes.
4.12.8 Troubleshooting Alarms and Diagnostic Faults – Gleaner
®
R65/R66/R75/R76
and S Series
Errors in the auto header height control (AHHC) system on Gleaner
®
R65/R66/R75/R76 and non-S9 S Series combines
appear on a display on the combine ’ s Electronic Instrument Panel (EIP).
NOTE:
Refer to 4.13 Gleaner
®
S9 Series Combines, page 202 for information specific to Gleaner
®
S9 Series combines.
NOTE:
Changes may have been made to the combine controls or the display since this document was published. Refer to the
combine operator’s manual for updated information.
AUTO HEADER HEIGHT CONTROL
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