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129
Revision B
Chapter 4:
Auto Header Height Control
The auto header height control (AHHC) topics provide combine model-specific instructions for optimizing header
performance.
4.1
Auto Header Height Control System Overview
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 float indicator box (A) on the CA25 Combine Adapter. This sensor sends a signal to the combine,
allowing it to maintain a consistent cutting height and the optimum float level as the header follows the contours of the
ground.
1003390
A
Figure 4.1: CA25 Combine Adapter
CA25 Combine Adapters are factory-equipped for AHHC; however, before using the AHHC feature, do the following:
1.
Ensure that the CA25 Combine Adapter is equipped to work with your combine. If necessary, install an appropriate
combine completion package onto the CA25 Adapter. Completion packages include instructions for installing the AHHC
system on the combine adapter.
2.
Ensure that the AHHC sensor
’
s output voltage range is appropriate for your combine. For more information, refer to
4.4 Sensor Output Voltage Range
Combine Requirements, page 134
3.
Prepare the combine to use the AHHC feature (this step applies only to some combine models
—
refer to your
combine
’
s operator manual).
4.
Calibrate the AHHC system to allow the combine to correctly interpret data from the height sensor on the combine
adapter in accordance with the instructions in this manual, or with those in the header operator
’
s manual.
5.
Set up and use the AHHC system in accordance with the instructions in this manual and with those in the combine
operator
’
s manual.
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