Case IH EHR4149 – ARM: Rear Remote No.4 Spool Deflection Excessive

The internal position sensor (potentiometer or transducer) on the #4 electronic remote valve is detecting that the hydraulic spool has traveled beyond its normal, calibrated physical limits. This is typically caused by an internal mechanical failure, debris physically wedging the spool open, or a faulty position transducer sending an out-of-range signal.

• Puma 150
• Puma 160
• Puma 165
• Puma 195
• Puma 210
• Magnum Series
• Maxxum Series
• Steiger Series

1. 1

   Review the tractor's fault code history for other active or stored codes related to the EHR system, such as lever implausibility (e.g., ARM 18069) or position transducer faults.

2. 2

   Check the hydraulic fluid level and ensure it is not contaminated, as low or dirty fluid can cause various hydraulic issues.

3. 3

   Perform a lever calibration procedure to resynchronize the lever with the valve. Method 1: turn the key on while pressing the program button on the armrest, navigate to the 'ARM' and then 'AUX LEVER' menu, and follow on-screen prompts to move levers to their full extent. Method 2: put the tractor in calibration mode, move the lever to its maximum extent, and operate the timer switch.

4. 4

   Visually inspect the No. 4 remote valve, hydraulic lines, and couplers for any signs of external hydraulic fluid leaks.

5. 5

   Test the DC voltage at the No. 4 remote valve solenoid while plugged in (should be 0V in neutral, increasing as the lever moves, and approx 5V in detent).

6. 6

   Perform a pressure test on the remote circuit using a pressure gauge connected to the male coupler tip to check for internal leakage.

1. 1

   Relieve hydraulic pressure

   Ensure the engine is off and all hydraulic pressure is completely relieved before working on the hydraulic system.

2. 2

   Replace coupler cartridges

   Remove the coupler body and replace both the raise and lower coupler cartridges to resolve potential internal leakage.

3. 3

   Inspect valve spool and replace seals

   Remove the remote valve section, disconnect the linkage, and unscrew the large pipe from the rear of the valve. Pull out the spool assembly to inspect for wear. Replace the seals and O-rings. Reassemble using a suitable assembly lube like Vaseline and not grease, as grease can clog hydraulic passages.

4. 4

   Replace valve section

   If significant internal wear or damage is found within the valve body, replace the entire valve section for the No. 4 remote.