MacDon PW8 - John Deere 70 Series Combines; Checking Voltage Range from Combine Cab (John Deere 70 Series)

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4.12 John Deere 70 Series Combines
To make your header’s auto header height control (AHHC) system compatible with John Deere 70 series combines, you
must check the height sensor voltage range, calibrate the feeder house speed, calibrate the AHHC system to ensure that it
is working correctly, and adjust the header sensitivity.
4.12.1 Checking Voltage Range from Combine Cab (John Deere 70 Series)
To ensure that the auto header height control (AHHC) system on your header works correctly with your John Deere 70
series combine, the output voltage from the header height control sensors must be verified.
The auto header height sensor output must fall within a specific range, or the feature will not work properly.
NOTE:
Changes may have been made to the combine controls or the display since this document was published. For instructions,
refer to the combine operator’s manual for updated information.
DANGER
Check to be sure all bystanders have cleared the area.
1. Raise the header until its wheels are 150 mm (6 in.) above the ground.
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Figure 4.154: John Deere Combine Display
2. Press HOME PAGE button (A) on the main page of the
combine display.
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Figure 4.155: John Deere Combine Display
3. Ensure that three icons (A) depicted in the illustration at
right appear on the combine display.
AUTO HEADER HEIGHT CONTROL