OPERATION
Figure 3.164: Auto Header Height Control (AHHC) Console
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 moves up and
down approximately 3/4 in. (19 mm) before the control module signals the hydraulic control valve to raise or lower
the header frame.
When the sensitivity adjustment dial (A) is set to minimum (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 2 in. (51 mm) before the control module signals the hydraulic control valve to raise or lower the
header frame.
The HEADER SENSE LINE input also changes the range of the sensitivity. When connected to a draper, the
counterclockwise position (least sensitive) allows for approximately 4 in. (102 mm) of vertical travel before correction
is ma de.
Troubleshooting Alarms and Diagnostic Faults (Gleaner R65/R75)
NOTE
:
Cha
nges may have been made to the combine controls or display since this document was published. Refer to
the
combine operator’s manual for updates.
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Revision A
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