John Deere 200302 – LC2: Sieve Position Did Not Reach Set Point

The sieve assembly failed to move to the position commanded by the operator during an adjustment or calibration cycle. The control unit sent a command to the sieve actuator to a specific opening, but the position sensor on the actuator did not report back that the target was achieved within the expected timeframe. This indicates a failure in the electronic or mechanical components responsible for positioning the sieve as intended during the automatic adjustment cycle.

• S550
• S650
• S660
• S670
• S680
• S690
• 9560 STS
• 9650 STS
• 9660 STS
• 9750 STS
• 9760 STS
• T550
• T560
• T660
• T670
• W540
• W550
• W650
• W660

1. 1

   Inspect for debris and obstructions by thoroughly cleaning the sieve and the surrounding area to ensure crop material or dirt is not physically blocking the louvers.

2. 2

   Check for mechanical damage by visually inspecting the sieve frame, louvers, and actuating linkages for bends, dents, broken parts, worn bushings, or a broken center pivot pin.

3. 3

   Inspect electrical connections and the wiring harness leading to the sieve actuator for loose connections, corrosion in the plugs, or frayed/damaged wires.

4. 4

   Verify that the fuses related to the cleaning shoe control circuits are intact.

1. 1

   Attempt Recalibration

   Ensure the sieve is completely free of debris. Turn the combine key to the 'RUN' position or start the engine. Navigate to the diagnostics menu on the display, then to calibrations, and select 'SIE' or 'Sieve Opening'. Run the calibration (display will show 'HOLd'). When finished, 'EOC' will appear; press enter to save the new values.

2. 2

   Manual Actuator Adjustment

   If calibration fails, shut off the engine, set the parking brake, and remove the key. Remove covers to access the sieve actuator motor. Use the knurled knob on the actuator to manually open and close the sieve to check for binding. Do not use a wrench on the knob to avoid damaging the motor.

3. 3

   Component Replacement

   If the actuator is seized, the internal sensor has failed, or the wiring pigtail is broken, disconnect the electrical harness, remove the mounting bolts, and detach the actuator. Install the new actuator, reconnect the harness, and perform a 'Component Replacement' calibration to ensure the system recognizes the new part.