Case IH 9309 – HITCH Controller (Electronic Draft Control / EDC module) or ARM (Armrest Controller): Hitch position at bottom of travel is not within specification during calibration

This code indicates that during the electronic draft control (EDC) or hitch calibration process, the rockshaft position potentiometer is reading a voltage or physical angle at the lowest point of the hitch's travel that falls outside the expected factory parameters.

• MX Magnum
• STX Steiger
• 7100 series (7110, 7120, 7130, 7140, 7150)
• 7200 series
• 8900 series
• STX 430
• STX 500
• STX 530
• Steiger 535
• Puma 130 through Puma 240
• MXM120-MXM190
• CX50-CX100
• TG Series (TG210, TG230, TG255, TG285)
• TM Series
• T6000/T7000 Series

1. 1

   Inspect the rear 3-point hitch linkage for any physical obstructions, packed dirt, or mechanical binding that is preventing the hitch from dropping to its true bottom-of-travel position

2. 2

   Verify if the physical position of the hitch was above the upper limit dial setting when the tractor was started

3. 3

   Inspect the rockshaft position potentiometer linkage for freezing up or physical slippage

4. 4

   Verify that the upper limit potentiometer dial in the cab armrest is functioning correctly and hasn't failed

1. 1

   Clear mechanical interference

   Clear any mechanical interference in the hitch linkage.

2. 2

   Adjust upper limit setting

   In the cab, turn the hitch upper limit setting dial so it is set above the current physical hitch position, or manually lower the hitch until the upper limit setting is reached.

3. 3

   Restart tractor

   Shut down the tractor completely, wait a few moments, and restart the engine. The fault code should clear if it was a simple limit-setting mismatch.

4. 4

   Inspect potentiometer linkage

   If the code persists, inspect the rockshaft position potentiometer on the rear hitch. Re-secure the linkage if it has slipped.

5. 5

   Replace potentiometer

   If the sensor is seized, physically broken, or returning out-of-range voltages, replace the Hitch Position Potentiometer.

6. 6

   Calibrate hitch

   After replacing the sensor, you must perform a full 3-point hitch calibration cycle to map the new sensor's voltage sweep to the hitch's physical top and bottom travel limits.