214683 125 Revision A
Refer to the following instructions for your specific combine model:
• 3.8.3 Case IH 5088/6088/7088 Combines, page 139
• 3.8.5 Case IH 7010/8010, 7120/8120/9120, 7230/8230/9230 and 7240/8240/9240 Combines, page 150
• 3.8.6 Challenger and Massey Ferguson 6 and 7 Series Combines, page 166
• 3.8.7 Gleaner R65/R66/R75/R76 and S Series Combines, page 173
• 3.8.8 Gleaner S9 Series Combines, page 183
• 3.8.9 John Deere 60 Series Combines, page 197
• 3.8.10 John Deere 70 Series Combines, page 205
• 3.8.11 John Deere S and T Series Combines, page 212
• 3.8.13 CLAAS 500 Series Combines, page 242
• 3.8.14 CLAAS 600 and 700 Series Combines, page 251
• 3.8.15 New Holland Combines (CR/CX Series—Pre-2015 Model Year), page 261
• 3.8.16 New Holland Combines (CR Series — Model Year 2015 and Later), page 271
3.8.1 Sensor Operation
The position sensors supplied with the auto header height control (AHHC) system are hall-effect sensors
containing sealed connectors. Normal operating signal voltages for the sensors fall between 10% (0.5 VDC) and
90% (4.5 VDC). An increase in sensor voltage correlates to an increase in header height.
Sensor errors result in a 0 V signal, indicating a faulty sensor or incorrect supply voltage.
OPERATION