Fendt 09.1.EB – A050 basic control unit: Y070 - EHR cut-off valve, front: Floating position is not reached

The floating position is not reached, causing the valve to move to neutral and lock.

• 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 800 Vario (COM III)
• Fendt 900 Vario (COM III)
• Fendt 922 Vario
• Fendt 924 Vario
• Fendt 927 Vario
• Fendt 930 Vario
• Fendt 933 Vario
• Fendt 936 Vario

1. 1

   Set initial testing conditions: engine at idle (800 rpm), valves and EPC locked, no steering input, and hydraulic oil temperature between 40-50°C

2. 2

   Check Fuse 13 (locations X1470 / X1471) which supplies power to the Y070 front power lift cut-off valve

3. 3

   Test the voltage supply to the Y070 valve using a multimeter (should read 12-14 VDC when active/unlocked, and 0 VDC when inactive)

4. 4

   Inspect the wiring harness and connectors between the A050 basic control unit and the Y070 valve for corrosion, damage, or poor pin connections

5. 5

   Verify if the pilot pressure is OFF or if the valve spool is mechanically stuck, preventing it from reaching the floating position

1. 1

   Relieve hydraulic pressure

   Ensure the tractor is turned off, the engine is stopped, and all hydraulic pressure in the system is fully relieved.

2. 2

   Locate valve

   Locate the Y070 EHR cut-off valve on the front power lift hydraulic block.

3. 3

   Inspect electrical harness

   Disconnect the electrical harness from the valve and inspect the pins.

4. 4

   Replace fuse or diagnose valve

   If the fuse (Fuse 13) is blown, replace it and retest. If the wiring and A050 ECU output are intact but the valve still fails to reach the floating position and locks in neutral, the Y070 cut-off valve is internally defective.

5. 5

   Replace valve

   Remove the defective Y070 EHR cut-off valve and install a genuine Fendt replacement part.

6. 6

   Reconnect harness

   Reconnect the electrical harness.

7. 7

   Clear fault code

   Clear the 09.1.EB fault code from the A050 basic control unit using the FENDIAS diagnostic terminal.

8. 8

   Perform functional test

   Perform a functional test of the front power lift to ensure the floating position can now be reached and the valve no longer locks in neutral.