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4.16.2 Calibrating Feeder House Speed – John Deere 70 Series
The feeder house speed must be calibrated on your John Deere 70 Series combine before the auto header height control
(AHHC) system can be calibrated.
Refer to the combine operator’s manual for instructions on how to calibrate the feeder house speed.
4.16.3 Calibrating Auto Header Height Control – John Deere 70 Series
The auto header height control (AHHC) sensor output must be calibrated for John Deere 70 Series combines, or the AHHC
feature will not work properly.
To ensure the best performance of the AHHC system, perform these procedures with the center-link set to D. When the
setup and calibration procedures are complete, adjust the center-link back to the desired header angle. For instructions,
refer to 3.7.4 Header Angle, page 78.
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 the most up-to-date information.
DANGER
Check to be sure all bystanders have cleared the area.
1. Ensure that the center-link is set to D.
2. Rest the header on the down stops and unlock the adapter float.
3. FlexDraper
®
Headers only: Place the wings in the locked position.
4. Start the combine.
Figure 4.210: John Deere Combine Display
5. Press the button located fourth from the left along the top
of monitor (A) to select icon (B) resembling an open book
with a wrench on it.
6. Press button (A) a second time to enter the diagnostics and
calibration mode.
AUTO HEADER HEIGHT CONTROL
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