Case IH 4150 – EHR (Electronic Hitch/Hydraulic Remote): Rear Remote No.4 - Open Center Position Not Reached

This code indicates that the spool inside the #4 rear hydraulic remote valve is failing to return to its neutral, open-center, or float position when commanded, or the position sensor (transducer) is failing to detect that the spool has reached this position.

• Magnum
• Maxxum
• Steiger T4B
• MAXXUM T4E
• Magnum Series
• Steiger Series
• Puma Series
• Maxxum Series

1. 1

   Check for accompanying EHR codes on the #4 remote (e.g., 4151, 4152, 4153, 4154). If 4153 is present, the issue is almost certainly the sensor/potentiometer.

2. 2

   Inspect the #4 remote lever or spool mechanically to see if it is physically jammed, binding, or restricted by debris.

3. 3

   Inspect the electrical connector and wiring harness at the #4 EHR valve at the rear of the tractor for corrosion, bent pins, or wire chafing.

4. 4

   Attempt an EHR valve calibration using the tractor's display (H-menu) or the Case IH Electronic Service Tool to see if the controller simply needs to relearn the neutral/center set point.

1. 1

   Safety First

   Park the tractor on a level surface, lower all implements, turn off the engine, and relieve all hydraulic pressure by cycling the remote levers/buttons before working on the valve stack.

2. 2

   Access the Valve Stack

   Locate the rear remote valve stack at the rear of the tractor and identify the #4 valve section.

3. 3

   Electrical Testing

   Disconnect the harness to the #4 valve. Use a multimeter to test the resistance of the position transducer and the solenoid coils against OEM specifications.

4. 4

   Mechanical Inspection

   If the electronics test fine, carefully remove the end cap of the #4 spool valve. Inspect the centering spring mechanism. A broken centering spring will physically prevent the spool from returning to the open center position.

5. 5

   Replace the Faulty Component

   If the centering spring is broken, install a new spring kit. If the position transducer is failed, replace the transducer cap/sensor. If the spool is heavily scored or the internal valve driver has failed, the entire EHR valve section must be replaced.

6. 6

   Reassembly

   Reinstall the valve components, reconnect the wiring harness, and top off the hydraulic fluid if any was lost during disassembly.

7. 7

   Calibration

   You must perform an EHR valve calibration using the Case IH Electronic Service Tool (or onboard diagnostic menu) so the EHR module can learn the new neutral/open center position of the replaced parts.