214683 208 Revision A
13. Check the sensor reading on the monitor.
14. Raise the header so it is just off the ground and recheck the sensor reading.
15. If the sensor voltage is not within the low and high limits or if the range between the low and high limits is
insufficient, refer to Adjusting Voltage Limits: One-Sensor System, page 131.
Calibrating Feeder House Speed (John Deere 70 Series)
The feeder house speed must be calibrated before you calibrate the auto header height control (AHHC) system.
Refer to the combine operator’s manual for instructions.
Calibrating the Auto Header Height Control (John Deere 70 Series)
For best performance of the auto header height control (AHHC), perform these procedures with the center-link set
to D. When setup and calibration are complete, adjust the center-link back to desired header angle. Refer to 3.7.5
Header Angle, page 81.
NOTE:
Changes may have been made to the combine controls or display since this document was published. Refer to the
combine operator’s manual for updates.
CAUTION
Check to be sure all bystanders have cleared the area.
NOTE:
If header float is set too light, it can prevent calibration of AHHC. You may need to set the float heavier for
calibration procedure so header doesn’t separate from the float module.
1. Ensure center-link is set to D.
2. Rest header on down stops and unlock float.
3. Place wings in locked position.
4. Start the combine.
Figure 3.332: John Deere Combine Display
5. Press the button located fourth from the left along the
top of the monitor (A) to select the icon that resembles
an open book with a wrench on it (B).
6. Press the top button (A) a second time to enter
diagnostics and calibration mode.
OPERATION
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