CLAAS Id77C2h / 77C2h (26) – HYD (A60): Valve 2 is subject to manual action.

The system detects that hydraulic spool valve 2 is being manually overridden or operated, or the sensor on the electrodistributor module is incorrectly detecting a manual override state when none is occurring.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850

1. 1

   Check the connectors and continuity of the wiring harnesses linking the HYD (A60) module to the A105-2 electrodistributor module.

2. 2

   Check for any short-circuits or open circuits in the wiring.

3. 3

   Check the sources of energy (fuses, supply voltage, and ground).

4. 4

   Check the resistance of the valve's solenoid/sensor and verify its mechanical adjustment.

5. 5

   Inspect the valve for mechanical seizing, pressure anomalies, or temperature issues that might cause the spool to stick in a manual override position.

1. 1

   Document and analyze codes

   Note all error codes present on the tractor. Analyze the interaction between them, as one error code can generate another.

2. 2

   Inspect Valve 2

   Locate the hydraulic electrodistributor unit at the rear of the tractor. Identify Valve 2 (A105-2).

3. 3

   Check for mechanical binding

   Ensure the manual override lever/mechanism on Valve 2 is not stuck, jammed by debris, or physically engaged.

4. 4

   Perform electrical testing

   Disconnect the harness to Valve 2. Use a multimeter to test the continuity of the wiring back to the HYD (A60) controller. Test the pins for proper voltage and ground.

5. 5

   Clean and re-seat connectors

   Clean the electrical contacts on the A105-2 module and re-seat the connector securely.

6. 6

   Clear codes and test

   Clear all error codes from the CEBIS/diagnostic terminal. Start the tractor and operate Valve 2 to see if the anomaly returns.

7. 7

   Replace component

   If the wiring is intact, the valve is not mechanically seized, and the code immediately returns, the sensor/head on the electrodistributor module (A105-2) has failed and the valve head or entire valve assembly must be replaced.