CLAAS Id77C9h / 77C9h (82) – HYD (A60): Valve 2 drawer is not in neutral upon activation / Electrodistributor 2 remains at neutral

A mechanical or electrical issue with the auxiliary hydraulic system's second valve, indicating the spool (drawer) inside the electro-hydraulic valve is either mechanically stuck, failing to actuate, or the position sensor is not reading its movement correctly.

• Axion 800 series
• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850

1. 1

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

2. 2

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

3. 3

   Verify the sources of energy by checking relevant fuses, 12V supply voltage, and ground connections

4. 4

   Check the internal electrical resistance of the electrodistributor solenoids

5. 5

   Inspect for mechanical seizing of the valve spool, hydraulic pressure issues, or extreme temperature conditions causing binding

6. 6

   Check the compatibility of the program versions, settings, and calibration of the hydraulic module

1. 1

   Document error codes

   Note all error codes present on the tractor terminal (CEBIS) to see if a CAN-bus or voltage error is causing this code as a secondary symptom.

2. 2

   Isolate electrical issues

   Perform the electrical multimeter tests (continuity, resistance, voltage) on the A105-2 valve harness.

3. 3

   Inspect valve

   If electrical tests pass, remove the electrodistributor valve 2 (A105-2) and inspect the spool (drawer) for debris, scoring, or mechanical binding.

4. 4

   Replace valve

   If the valve is mechanically seized or the internal position sensor/solenoid has failed, replace the Electrodistributor module (A105-2).

5. 5

   Calibrate and clear codes

   After replacement, clear all error codes from the HYD module.

6. 6

   Test operation

   Operate the auxiliary hydraulics to ensure the valve actuates and returns to neutral properly without triggering the anomaly.