Fendt 9.1.5B – FRONT POWER LIFT / VENDI: Y019 - Auxiliary control valve: Floating position is not reached

The main piston of the spool valve fails to reach its commanded floating position. As a safety consequence, the system automatically forces the valve to move into the neutral position and lock.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• Farmer 409 Vario
• Farmer 410 Vario
• Farmer 411 Vario
• Farmer 412 Vario
• Farmer 413 Vario
• Farmer 414 Vario
• Farmer 415 Vario
• Favorit 711 Vario
• Favorit 712 Vario
• Favorit 714 Vario
• Favorit 716 Vario
• Favorit 718 Vario
• Favorit 815 Vario
• Favorit 817 Vario
• Favorit 818 Vario
• Favorit 820 Vario
• Favorit 916 Vario
• Favorit 920 Vario
• Favorit 924 Vario
• Favorit 926 Vario
• Favorit 930 Vario
• Favorit 936 Vario
• Favorit 939 Vario

1. 1

   Verify that the hydraulic oil is at operating temperature and control pressure has not dropped below 22 bar (low pressure or cold oil can cause short piston travel).

2. 2

   Inspect the supply voltage to the Y019 valve (must be between 8V and 18V, without overvoltage spikes above 45V).

3. 3

   Check the CAN bus wiring (specifically A002 CAN II Pins 4 and 5) to ensure the valve is communicating with the system.

4. 4

   Check if the valve slide is mechanically jamming or if the floating position was deflected manually by the operator.

1. 1

   Locate the Valve

   Locate the Y019 auxiliary control valve. On most Vario models, this valve is located on the right entry, behind the hydraulic oil tank. You will need to remove the metal panel to access it.

2. 2

   Inspect Wiring

   Disconnect the electrical connector (typically designated as X330 or X329 depending on the exact valve position) and inspect the pins for corrosion, moisture, or damage.

3. 3

   Test the Actuator

   If the wiring and hydraulic control pressures are within specification, the issue is likely an internal failure of the valve's position pickup sensor (Code 9.1.57) or a mechanical jam within the pilot control actuator.

4. 4

   Replace the Valve

   Electrohydraulic spool valves with internal sensor/actuator failures generally cannot be serviced internally and must be replaced as a complete assembly.

5. 5

   Calibration

   After installing the new spool valve, use the FENDIAS diagnostic tool or the tractor's onboard terminal to clear the fault codes and perform an EOL (End of Line) teach-in/calibration so the ECU recognizes the new valve's parameters.