MacDon FD75 - John Deere 70 Series Combines; Checking Voltage Range from Combine Cab (John Deere 70 Series)

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NOTE:
The numbers depicted on displays in these illustrations
are for reference purposes only; they are not intended
to represent specific settings for your equipment.
3.8.10 John Deere 70 Series Combines
Checking Voltage Range from Combine Cab (John Deere 70 Series)
The auto header height sensor output must be within a specific range, or feature will not work properly.
Combine
Low Voltage Limit High Voltage Limit Minimum Range
John Deere 70 Series
0.7 V 4.3 V 3.0 V
Check sensor’s output voltage range from combine cab according to instructions that follow.
NOTE:
Changes may have been made to combine controls or display since this document was published. Refer to
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 adapter float.
1001416
A
B
Figure 3.269: Float Lock
2. Check that float lock linkage is on down stops
(washer [A] and nut [B] 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