Case IH 4337 – EHR (Electronic Hitch/Hydraulic Remote): Rear Remote No.8 - Open Center Position Not Reached

This fault indicates that the spool inside the #8 rear hydraulic remote valve is failing to return to or reach its neutral (open center) position when commanded. This is typically caused by a failure in the electronic pilot head (proportional actuator) that drives the spool, a physical sticking/binding of the spool inside the valve body, or incorrect hydraulic pressure.

• Magnum
• Steiger T4B
• Magnum series
• STX Steiger series
• Quadtrac series
• Puma series
• Maxxum series

1. 1

   Check On-Board Diagnostics via the HH menu or Electronic Service Tool (EST) to verify the code and check for accompanying electrical faults (e.g., under/over voltage or CAN bus communication errors).

2. 2

   Inspect the wiring harness and 4-pin connector from the EHR controller to the #8 remote valve pilot head for corrosion, pushed pins, or wire chafing.

3. 3

   Attempt to recalibrate the remote valves through the tractor's display. If the valve fails to calibrate or immediately locks up and throws the code again, the pilot head is likely the culprit.

4. 4

   Perform a mechanical check to ensure the spool is not physically jammed by debris or excessive wear inside the valve body.

1. 1

   Park and relieve pressure

   Park the tractor on a level surface, turn off the engine, and relieve all hydraulic system pressure.

2. 2

   Locate valve

   Locate the #8 rear remote valve on the rear hydraulic stack.

3. 3

   Disconnect harness

   Disconnect the electrical harness connector from the pilot head (the electronic actuator mounted on top/end of the valve body).

4. 4

   Remove pilot head

   Remove the mounting screws securing the pilot head to the remote valve body and carefully remove the faulty actuator.

5. 5

   Clean surface

   Clean the mating surface on the valve body. Ensure no dirt enters the hydraulic system.

6. 6

   Install new pilot head

   Install the new pilot head assembly (ensure new O-rings are in place) and tighten the mounting screws.

7. 7

   Reconnect harness

   Reconnect the electrical harness.

8. 8

   Reassign valve

   Turn the tractor on. You must reassign the valve addresses using the tractor's H-menu or the EST software so the EHR controller recognizes the new pilot head and maps it to the correct cab lever.

9. 9

   Calibrate

   Perform the remote valve calibration procedure to tune the new pilot head for proper hydraulic flow and neutral positioning.

10. 10

    Test operation

    Test the remote with an implement to ensure the code is cleared and the valve operates smoothly.