Case IH 1967-02 - UCM – UCM: High temperature in the actuator of rear pilot head #5

The internal temperature sensor within the electronic actuator (pilot head) for the #5 rear hydraulic remote valve has detected an abnormally high temperature. This is typically caused by an internal electrical short, excessive current draw due to a mechanically binding hydraulic spool, or extreme hydraulic fluid temperatures transferring heat to the actuator.

• MAGNUM AFS Connect
• Steiger AFS Connect

1. 1

   Verify the code on the AFS Pro display to confirm it is logging as a High Temperature error (1967-02) rather than a loss of communication.

2. 2

   Carefully feel the #5 rear remote actuator (pilot head) to confirm if it is physically hotter than the adjacent remote actuators.

3. 3

   Disconnect the electrical harness to the #5 remote actuator and inspect the pins for corrosion, moisture, or melting.

4. 4

   Check if the hydraulic spool valve itself is sticking or mechanically binding, which causes excessive current draw.

5. 5

   Ensure the tractor's overall hydraulic oil temperature is within normal operating range.

1. 1

   Cool Down & Reset

   Allow the tractor and the #5 actuator to cool completely. Clear the fault codes in the UCM and cycle the key to see if the code returns immediately on startup (indicating a hard electrical short) or only after use (indicating a mechanical bind or working overload).

2. 2

   Clean Connections

   Spray the #5 actuator connector with electronic contact cleaner, apply dielectric grease, and reconnect.

3. 3

   Swap Test (Optional)

   If the harness allows, temporarily swap the electrical connection between remote #4 and remote #5. If the high-temperature code moves to the #4 circuit, the actuator itself is internally faulty. If the code stays on the #5 circuit, there is a wiring harness short to the UCM.

4. 4

   Replace the Actuator

   If the actuator is internally shorted or burned out, unbolt the pilot head/actuator assembly from the #5 hydraulic valve slice and install a new unit.

5. 5

   Calibration

   After replacing a remote valve actuator, use the tractor's display or the Case IH Electronic Service Tool (EST) to perform a hydraulic remote valve calibration so the UCM can learn the new actuator's end-of-stroke limits.