John Deere 1493 – RCU / LC1: Tailings Monitor System Failure

The tailings monitor system has detected that the tailings sensors have been reading the same value for 10 seconds and are not full. This indicates the sensors are not detecting any change in the flow of tailings, which could be due to a sensor malfunction, a physical blockage, or an issue with the sensor's ability to read the material flow. A static reading is not expected during active harvesting operations.

• 9560 STS
• 9650 STS
• 9660 STS
• 9670 STS
• 9750 STS
• 9760 STS
• 9770 STS
• 9860 STS
• 9880 STS
• S430
• S440
• S540
• S550
• S650
• S660
• S670
• S670H
• S680
• S680H
• S685
• S685H
• S690
• S690H
• S760
• S770
• S780
• S785
• S790
• T550
• T560
• T660
• T670
• W540
• W550
• W650
• W660
• X9 1000
• X9 1100
• 9450
• 9540
• 9550
• 9560
• 9580
• 9640
• 9650
• 9660
• 9680
• C670

1. 1

   Check machine settings for incorrect seed size, which can lead to inaccurate tailings volume readings

2. 2

   Observe system behavior on the VisionTrak or CommandCenter display: slow the ground speed to see if the tailings volume bar graph returns to normal

3. 3

   Disengage and re-engage the header to see if the bar graph zeroes out and returns to an acceptable range

4. 4

   Stop the machine and inspect for physical blockages or plugging in the tailings elevator and auger, which can be caused by heavy, green weeds

1. 1

   Turn off power

   Ensure the combine's key switch is in the OFF position.

2. 2

   Locate and remove sensors

   Locate the tailings sensors on the tailings elevator. Remove the retaining screw and nut to access and remove the sensors.

3. 3

   Inspect and clean lenses

   Inspect the sensor lenses for any coating of dust or material. Clean the lenses thoroughly as needed.

4. 4

   Check for internal dust

   If the lenses are clean but the problem persists, remove the lens to check for internal dust, which indicates the seal under the lens has failed.

5. 5

   Clean and reassemble

   If dust is found inside, thoroughly clean the area and reassemble the lens, ensuring the gasket provides a proper seal.

6. 6

   Reinstall and test

   Reinstall the sensor and test the system. If the display continues to show a full or empty reading incorrectly, replace the sensor module.