CLAAS Id77AEh / 77AEh (31) – HYD (A60): Power supply of valve 1 is too low (< 8 V)

Voltage issue within the hydraulic system indicating that the power supply of valve 1 is too low (< 8 V).

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

1. 1

   Check the connectors and the continuity of the harnesses linking the HYD (A60) module to the electrodistributor module (A105-1)

2. 2

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

3. 3

   Check the sources of energy, specifically the fuses, power supply, and ground connections for the electrodistributor module power supply

4. 4

   Check the component's internal resistance to ensure the solenoid coil hasn't failed

5. 5

   Check the component's operating conditions (e.g., pressure, temperature, mechanical seizing of the valve drawer)

1. 1

   Identify and Isolate

   Note all error codes present on the tractor to ensure this code wasn't generated as a secondary fault by another module.

2. 2

   Inspect Wiring

   Visually inspect the wiring harness leading to the A105-1 electrodistributor valve for chafing, corrosion, or disconnected pins.

3. 3

   Test Voltage

   Using a multimeter, measure the voltage at the valve connector with the ignition on. If the voltage is indeed below 8V, trace the circuit back to the fuse box and the HYD (A60) module to locate the voltage drop or broken wire.

4. 4

   Repair/Replace

   Repair any damaged wiring or replace blown fuses. If the wiring and voltage supply are confirmed good but the valve itself is internally shorted or failing, replace the electrodistributor module (A105-1).

5. 5

   Clear and Test

   Clear all error codes from the system, then operate the tractor's hydraulics to verify that the anomaly does not reappear.