Massey Ferguson A.11.23 – Mid Mount Valve Module / Hydraulic Control Module: External Hydraulic Valve 1 Issue

Malfunction in the first external hydraulic remote valve (spool valve) circuit. The underlying condition is typically caused by a loss of communication between the tractor's dash and the valve module, an out-of-range spool position sensor value, or a loss of valve calibration.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Check for related diagnostic codes such as 0B.00.17 through 0B.00.21 (Issue With Spool Position Sensor Value) or 0B.00.22 through 0B.00.24 (Issue With Calibration of Valves)

2. 2

   Inspect the wiring harness and connectors between the Dash and the Mid Mount Valve Module for corrosion, moisture ingress, or loose pins

3. 3

   Monitor the spool position sensor value via the tractor's diagnostic terminal to see if it registers movement when the valve is commanded

4. 4

   Attempt a hydraulic valve calibration procedure through the tractor's onboard terminal or a compatible diagnostic tool

1. 1

   Depressurize the System

   Ensure the tractor is turned off, the implement is lowered, and all hydraulic pressure is relieved from the system.

2. 2

   Access the Valve Block

   Locate the external hydraulic valve block (usually at the rear or mid-mount, depending on the tractor's configuration). Identify Valve Slice #1.

3. 3

   Replace the Solenoid/Sensor

   Remove the retaining screws holding the solenoid coil and spool position sensor (potentiometer) to the valve body. Install the new sensor/coil assembly.

4. 4

   Inspect the Spool Valve

   If the sensor is not the issue, the internal spool may be sticking. Remove the spool valve slice, inspect for scored metal or damaged O-rings, and replace the entire slice if internal damage is found.

5. 5

   Reassemble and Calibrate

   Reinstall the components, torque to OEM specifications, and reconnect the wiring harness.

6. 6

   Final Calibration

   Power on the tractor, clear the stored A.11.23 fault code, and run the mandatory electro-hydraulic spool valve calibration procedure to marry the new sensor/valve to the ECU.