MacDon FlexDraper FD140 - Sensor Output Voltage Range - Combine Requirements; Volt Adapter (MD #B6421) - New Holland Combines Only

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3.8.2 Sensor Output Voltage Range – Combine Requirements
The auto header height control (AHHC) sensor output must be within a specific voltage range for each combine, or
the AHHC feature will not work properly.
Table 3.20 Combine Voltage Limits
Combine
Low Voltage Limit High Voltage Limit
Range (Difference
between High and
Low Limits)
Challenger, Gleaner A,
Massey Ferguson
0.5 V
4.5 V
2.5 V
Case IH 5088/6088/7088,
5130/6130/7130, 7010/8010,
7120/8120/9120, 7230/8230/9230, and
7240/8240/9240
0.5 V 4.5 V 2.5 V
Case IH 2588/2577
2.8 V 7.2 V 4.0 V
Gleaner R and S Series
0.5 V 4.5 V 2.5 V
John Deere 60, 70, S, and T Series
0.5 V 4.5 V 2.5 V
CLAAS 500/600/700 Series
0.5 V 4.5 V 2.5 V
New Holland CR/CX - 5 V system
0.7 V 4.3 V 2.5 V
New Holland CR/CX - 10 V system
2.8 V 7.2 V 4.1–4.4 V
NOTE:
Some combine models do not support checking sensor output voltage from the cab (early Case 23/2588 series,
CLAAS 500/600/700 Series). For these models, check output voltage manually. Refer to Manually Checking
Voltage Range: One-Sensor System, page 127 or Manually Checking Voltage Range: Two-Sensor System, page
129.
10 Volt Adapter (MD #B6421) – New Holland Combines Only
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A
Figure 3.154: 10 V Adapter (MD #B6421)
New Holland combines with a 10 V system require the 10 V
adapter (A) (MD #B6421) for proper calibration of the auto
header height control (AHHC) feature.
If a 10 V New Holland combine does not have the adapter
installed, the AHHC output will always read 0 V, regardless
of sensor position.
OPERATION