MacDon FlexDraper FD75 - Setting Sensitivity of Auto Header Height Control - Challenger; Series

214323 170 Revision B
4.8.6 Setting Sensitivity of Auto Header Height Control – Challenger
®
6 Series
The sensitivity adjustment controls the distance the cutterbar must travel up or down before the auto header height
control (AHHC) reacts and raises or lowers the feeder house.
When the sensitivity is set to maximum, only small changes in ground height are needed to cause the feeder house to rise
or fall. When the sensitivity is set to minimum, large changes in the ground height are needed to cause the feeder house to
rise or fall.
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.
1. Press the HEADER icon on the FIELD page. The HEADER page appears.
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A
Figure 4.85: Challenger
®
Combine Display
2. Press HEADER CONTROL button (A). The HEADER CONTROL
page appears.
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A
A
Figure 4.86: Challenger
®
Combine Display
3. Adjust the sensitivity to the MAXIMUM setting using on-
screen up and down arrows (A).
4. Activate the AHHC and press the HEADER LOWER button on
the control handle.
5. Decrease the sensitivity until the feeder house remains
steady and does not bounce up and down.
NOTE:
This is the maximum sensitivity and is only an initial setting.
The final setting must be made in the field; the system’s
reaction will vary according to changing field surfaces and
operating conditions.
NOTE:
A setting lower than the maximum will reduce the
frequency of header height corrections and, thereby,
component wear. Partially opening the accumulator valve
will cushion the action of the header lift cylinders and
reduce the occurrence of “header hunting” events, during
which the combine continually tries to find a height setting
without success.
AUTO HEADER HEIGHT CONTROL