Case IH 4122 – EHR (Electronic Hitch/Hydraulic Remote): Rear Remote No.2 - Open Center Position Not Reached

The electronic controller commanded the spool valve for the #2 rear hydraulic remote to move to the open center (neutral/float) position, but the position transducer (potentiometer) on the valve reported that the spool did not physically reach that target position.

• Magnum
• Maxxum
• Steiger T4B
• MAXXUM T4E
• VESTRUM CVX
• Magnum series
• Steiger series
• Puma series
• MX / TG series

1. 1

   Check the #2 rear remote valve spool for physical binding, debris, or contamination that could prevent the spool from physically returning to the center/float position

2. 2

   Inspect the electrical connector at the #2 EHR valve for pushed-out pins, corrosion, or moisture ingress

3. 3

   Test the wiring harness between the EHR controller and the #2 remote valve for continuity, open circuits, or shorts to ground/power

4. 4

   Check for related fault codes (such as 4124 or 4125) which indicate an internal failure of the valve's electronic actuator head

1. 1

   Relieve Pressure

   Ensure the tractor is off and hydraulic pressure is relieved from the system.

2. 2

   Inspect & Clean

   Disconnect the harness from the #2 rear remote valve. Clean the connector and verify pin integrity.

3. 3

   Test/Replace Actuator

   If diagnostics point to a failed position transducer or driver, remove the electronic actuator/potentiometer head from the #2 rear remote valve body.

4. 4

   Install New Part

   Install the replacement EHR actuator head and reconnect the wiring harness.

5. 5

   Clear Codes

   Turn the key on and use the tractor's display or an Electronic Service Tool (EST) to clear the 4122 error code.

6. 6

   Recalibrate the Valve

   Perform the EHR Valve Spool Calibration procedure via the tractor's Pro Vision display or EST.

7. 7

   Operational Test

   Test the #2 remote using the in-cab EHR lever to ensure it reaches the float/open center position without logging further codes.