John Deere 1493 – E00: Tailings System Calibration Out of Range Low

Fault code 1493 indicates that the tailings system calibration is out of range low, meaning the sensor detectors within the tailings elevator are receiving too much light. During a system self-check, if the light detected by the sensor is above the expected threshold, this fault is triggered. This condition is typically caused by a missing paddle on the tailings elevator chain, which allows the light beam to pass through unobstructed, or a failure within the sensor itself.

• S430
• S440
• S540
• S550
• S650
• S660
• S670
• S670H
• S680
• S680H
• S685
• S685H
• S690
• S690H
• S760
• S770
• S780
• S785
• S790
• W540
• W550
• W650
• W660
• T550
• T560
• T660
• T670
• X9 1000
• X9 1100
• 9450
• 9540
• 9550
• 9560
• 9560 STS
• 9570 STS
• 9580
• 9640
• 9650
• 9650 STS
• 9660
• 9660 STS
• 9670
• 9670 STS
• 9750 STS
• 9760 STS
• 9770 STS
• 9860 STS
• 9880 STS
• C670
• CTS

1. 1

   Visually inspect the tailings elevator for any missing rubber paddles on the conveyor chain that could allow excess light to pass through.

2. 2

   Turn the key switch to the OFF position and unplug the tailings sensor.

3. 3

   Remove the tailings sensor(s) from the elevator housing and inspect the lenses for dirt, dust, or any material coating. Clean the lenses as needed.

4. 4

   Check for dust that may have gotten behind the sensor lens by breaking the seal. If dust is present, remove the lens, clean the area thoroughly, and reassemble, ensuring the gasket provides a good seal.

1. 1

   Recalibrate the system

   Navigate to the calibrations menu on the machine's CommandCenter or GreenStar display and select the yield or grain loss monitor calibration (VisionTrak). Operate the combine at a desired and acceptable performance level, then press the calibration button to save this operating state as the new reference point.

2. 2

   Replace missing elevator paddles

   If paddles were found missing during inspection (causing the excess light condition), remove the elevator housing, replace the missing paddles on the conveyor chain, and reinstall. Ensure the new paddles are oriented correctly to properly scoop the grain.

3. 3

   Replace the tailings sensor

   If cleaning and recalibration do not clear the fault, the Master Tailings Sensor has likely failed. Turn off the machine, disconnect the sensor, remove the old module, and install the new one. Test the system and perform a recalibration after replacement.