Case IH 4563 – EHR (Electro-Hydraulic Remote) control system: Front remote no. 4 - no communications

The tractor's CAN bus system has lost communication with the electronic control module integrated into the Electro-Hydraulic Remote (EHR) valve number 4, located at the front of the tractor.

• Puma/Mid Range Magnum
• MAXXUM T4E
• Case IH Puma Series
• Case IH Steiger Series
• Case IH Magnum Series
• Case IH Maxxum Series

1. 1

   Check the EHR Diagnostic LED flashing codes (it may be necessary to carefully remove the paint from the housing of the EHR valve next to the connector to see the internal LED flashing).

2. 2

   Inspect the electrical connector at Front Remote Valve No. 4 for corrosion, backed-out pins, moisture ingress, or physical damage to the wiring harness.

3. 3

   Verify the valve is receiving proper operating voltage (12V) and a solid ground.

4. 4

   Test the CAN High and CAN Low lines for continuity between the valve connector and the central controller.

5. 5

   Ensure the EHR control lever/joystick for remote number 4 is in the neutral position.

1. 1

   Prepare machine safely

   Park the tractor on a level surface, lower all front and rear hydraulic implements to the ground, turn off the engine, and relieve all hydraulic pressure by cycling the remote levers/buttons.

2. 2

   Clean the Area

   Thoroughly clean the front remote valve stack to prevent dirt from entering the hydraulic system during disassembly.

3. 3

   Disconnect Electrical

   Unplug the electrical harness connector from Front Remote Valve No. 4.

4. 4

   Disconnect Hydraulics

   Mark and disconnect the hydraulic lines attached to the valve. Cap all lines and fittings immediately to prevent contamination and fluid loss.

5. 5

   Remove the Valve

   Remove the tie-bolts or mounting hardware securing the EHR valve to the manifold/stack and carefully extract the valve.

6. 6

   Install the New Valve

   Mount the replacement EHR valve. Torque the mounting bolts to the specific OEM torque spec for your exact model's valve stack.

7. 7

   Reassemble

   Reconnect the hydraulic lines and plug in the electrical connector.

8. 8

   Calibration

   Turn the key on and verify that fault code 4563 changes from 'Active' to 'Inactive.' You will likely need to perform a hydraulic remote valve calibration using the tractor's AFS Pro display or an electronic service tool so the central controller recognizes the new valve.