John Deere 50 Series Combines; Output Voltage Range - MacDon FFT FD75 Assembly Instructions Manual

The scroll wheel (A) is on right of Tyton terminal.
Header height setpoint control dial (A) is on header control
cluster.

5.1.8 John Deere 50 Series Combines

Output Voltage Range

The auto header height sensor output must be within a specific range, or feature will not work properly.
Combine
John Deere 50 Series
Check sensor's output voltage range from combine cab or manually at float indicator box according to instructions
that follow.
Manually Checking Output Voltage Range
To manually check sensor's output voltage range, follow these steps:
214325
SETTING UP AUTO HEADER HEIGHT CONTROL
Low Voltage Limit
0.7 V
193
Figure 5.115: Scroll Wheel for Adjustments
Figure 5.116: Header Control Cluster
High Voltage Limit
4.3 V
Minimum Range
3.0 V
Revision A