Case IH EHR4336 – EHR: Rear Remote No.8 Spool Deflection Excessive

The EHR (Electronic Hitch and Remote) control module has detected an abnormally large range of travel in the spool of the eighth rear hydraulic remote valve. This excessive deflection indicates a potential mechanical or electrical issue within the valve assembly or its control system, which can negatively impact the performance and precision of the associated hydraulic functions.

• Magnum 235
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 340
• Magnum 370
• Magnum 380
• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.380
• T8.390
• T8.410
• T8.420
• T8.435

1. 1

   Visually inspect the No. 8 remote valve block and surrounding area for hydraulic fluid leaks, damaged wiring, or corroded connectors

2. 2

   Check hydraulic fluid level and condition, as contaminated fluid can cause spool stiction or erratic behavior

3. 3

   Scan for other active fault codes, such as EHR4330 (Position Transducer Faulty), which could provide a more specific diagnosis

4. 4

   Check the in-cab control lever and potentiometer; if the display indicates the remote is active when in neutral, the lever may be faulty

5. 5

   Perform a swap test by exchanging the electrical connectors (pilot heads) between the faulty No. 8 remote and a known working remote to isolate whether the issue is in the pilot head/wiring or mechanical within the valve

1. 1

   Calibrate EHR remote valves

   Warm hydraulic fluid to at least 50°C (122°F). Attempt to recalibrate the EHR remote valves using the A-post display, program key, or electronic service tool before replacing parts.

2. 2

   Inspect spool and valve body

   If calibration fails, carefully remove the valve spool from the valve body. Inspect the spool for scoring, wear, or damage, and check the valve body bore for internal wear.

3. 3

   Inspect position transducer and wiring

   Inspect the position transducer/sensor and its wiring for damage, as a fault here can generate the incorrect 'excessive deflection' reading.

4. 4

   Replace faulty components

   Based on diagnostic findings, replace the faulty control lever, pilot head (solenoid), or the entire remote valve assembly.