![background image](http://html.mh-extra.com/html/macdon/fd75/fd75_operators-manual_685691260.webp)
214323
242
Revision B
1003769
A
Figure 4.222: John Deere Combine Display
7.
Select the AHHC SENSING option.
8.
Press icon (A) resembling an arrow in a box. The AHHC
SENSING menu appears and five pages of information are
displayed.
1003770
A
Figure 4.223: John Deere Combine Display
9.
Press icon (A) until it reads Page 5 near the top of the page.
The following sensor readings appear:
•
LEFT HEADER HEIGHT
•
CENTER HEADER HEIGHT
•
RIGHT HEADER HEIGHT
A reading is displayed only for the center header height
sensor. On a MacDon header, there is only one sensor
located in the float indicator box on top of the CA25.
10. Ensure that the header float is unlocked.
11. Start the combine and fully lower the feeder house to the ground.
NOTE:
You may need to hold the HEADER DOWN switch for a few seconds to ensure that the feeder house is fully lowered.
12. Check the height sensor reading on the monitor.
13. 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
4.4.2 Adjusting Voltage Limits, page 137
4.17.2
Calibrating Feeder House Fore-Aft Tilt Range
–
John Deere S and T Series
This procedure applies only to model year 2015 and later John Deere S and T Series combines.
For best performance of auto header height control (AHHC), perform these procedures with the center-link set to
D
. When
setup and calibration are complete, adjust center-link back to the desired header angle. For instructions, refer to
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.
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