MacDon D1 Series - 9.1.2 Troubleshooting Auto Header Height; Float Indicator

215184 306 Revision A
Refer to the following instructions for your specific combine model:
• 9.1.4 AGCO IDEAL
™
Series Combines, page 318
• 9.1.5 Case IH 5088/6088/7088 Combines, page 331
• 9.1.7 Case IH 7010/8010, 120, 230, 240, and 250 Series Combines, page 342
• 9.1.8 Challenger and Massey Ferguson 6 and 7 Series Combines, page 358
• 9.1.9 CLAAS 500 Series Combines, page 366
• 9.1.10 CLAAS 600 and 700 Series Combines, page 374
• 9.1.11 CLAAS 8000/7000 Series Combines, page 383
• 9.1.12 Gleaner R65/R66/R75/R76 and S Series Combines, page 392
• 9.1.13 Gleaner S9 Series Combines, page 402
• 9.1.14 John Deere 60 Series Combines, page 416
• 9.1.15 John Deere 70 Series Combines, page 424
• 9.1.16 John Deere S and T Series Combines, page 431
• 9.1.18 New Holland Combines – CR/CX Series – 2014 and Prior, page 462
• 9.1.19 New Holland Combines – CR Series – 2015 and Later, page 472
9.1.1 Sensor Operation
The position sensors supplied with the auto header height control (AHHC) system are hall-effect sensors. 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 a
decrease in ground pressure, or if you are cutting off the ground on gauge wheels, an increase in the header cut height.
Sensor errors result in a 0 V signal, indicating a faulty sensor, incorrect supply voltage, or a damaged wiring harness.
9.1.2 Troubleshooting Auto Header Height / Float Indicator
Use the following tables to determine the recommended repair procedure:
Problem Solution Refer to
Symptom: Float indicator not moving
Cable (A) is frayed
Replace cable.
Excessive material built up inside float
indicator / auto header height frame
Clean out material.
—
Cable (A) fell off of pulleys (B)
Check pulleys and replace them if
necessary.
—
Rubber sheath (C) came off of
cable (A) and gets caught on the pulley
Install cable ties around the rubber
sheath and cable to secure it.
—
Spring (D) seized from corrosion
Replace spring.
—
Cotter pin (E) breaks and pin spins
Check for seized pin in bore, clean if
necessary, and then replace cotter pin.
—
Voltage range too low or high Adjust voltage range.
9.1.3 Sensor Output Voltage Range –
Combine Requirements, page 307
Faulty sensor (F)
Replace sensor. See your MacDon Dealer
SETTING UP AUTO HEADER HEIGHT CONTROL