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Checking Voltage Range from the Combine Cab (John Deere S7 Series)
The auto header height sensor output must be within a specific range, or the feature will not work properly.
Combine
Low Voltage Limit High Voltage Limit Minimum Range
John Deere S7 Series
0.5 V 4.5 V 3.0 V
Check the sensor’s output voltage range from combine cab according to instructions that follow.
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.
1. Position header 150 mm (6 in.) above ground, and unlock float.
Figure 3.396: Float Lock
2. Check that float lock linkage is on down stops (washer
[A] cannot be moved) at both locations.
NOTE:
If header is not on down stops during next two steps,
voltage may go out of range during operation causing a
malfunction of auto header height control (AHHC)
system.
OPERATION
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