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5 Setting up Auto Header Height Control
5.1 Auto Header Height Control (AHHC)
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 combine
allowing it to maintain a consistent cutting height and an optimum adapter float as header follows ground contours.
Figure 5.1: CA25 Combine Adapter
CA25 Combine Adapters are factory-equipped for AHHC; however, before using AHHC feature, you must do the
following:
1. Ensure that AHHC sensor's output voltage range is appropriate for combine. For more information, refer to
5.1.1 Sensor Output Voltage Range – Combine Requirements, page
2. Prepare combine to use AHHC feature (applies only to some combine models—refer to instructions for your
combine).
3. Calibrate AHHC system so that combine can correctly interpret data from height sensor on combine adapter
(refer to instructions for your combine).
NOTE:
Once calibration is complete, you are ready to use AHHC feature in field. Individual combine settings can
improve AHHC performance (refer to your combine instruction manual).
NOTE:
If your CA25 Combine Adapter is not equipped to work with a specific combine model, you will need to install
appropriate combine completion package. Completion packages come with instructions for installing AHHC
sensor on combine adapter.
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