Fendt 09.1.4A – Hydraulics / Enhanced Control ECU: Y022 - Field pressure control solenoid valve (front)

A faulty pressure-limiting valve causes the valve to automatically move to neutral and lock, preventing the front power lift from lowering.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 700 SCR
• Fendt 800 Vario (COM III)
• Fendt 800 Vario S4
• Fendt 900 Vario (COM III)
• Fendt 900 SCR
• 922 Vario
• 924 Vario
• 927 Vario
• 930 Vario
• 933 Vario
• 936 Vario

1. 1

   Inspect the wiring harness at separation point X333 (Y022 solenoid valve connector) for a short circuit to earth, a short circuit to battery voltage (UB), or a break in the wiring.

2. 2

   Perform a voltage test at the Y022 connector (Earth pin 22) with the ignition ON, engine running, EPC unlocked, and field pressure set to 3 bar in double-acting (DA) mode. The voltage should read approximately 5.8 VDC.

3. 3

   Command the front power lift to lower and verify that the voltage drops to 0 VDC. If voltages are correct but the valve remains locked in neutral, the solenoid valve is mechanically faulty.

1. 1

   Locate the Valve

   The Y022 solenoid valve is located on the right side of the tractor, mounted on the central valve block for the enhanced control hydraulics.

2. 2

   Access the Valve Block

   Depending on the specific Vario model, you may need to remove the right rear wheel and detach the metal guard/panel to gain full access to the central valve block.

3. 3

   Relieve Pressure

   Ensure the tractor is turned off and relieve all hydraulic pressure in the system before servicing the valve block.

4. 4

   Disconnect Electricals

   Unplug the electrical connector at separation point X333 from the Y022 solenoid valve.

5. 5

   Replace the Valve

   Unbolt and remove the faulty Y022 pressure-limiting valve. Install the new genuine Fendt solenoid valve.

6. 6

   Reassembly

   Reconnect the X333 electrical connector, reinstall the metal guard, and remount the right rear wheel (if removed).

7. 7

   Calibration/Testing

   Start the tractor, unlock the EPC, and test the front power lift via the Vario terminal to ensure the field pressure regulates correctly and the fault code is cleared.