Massey Ferguson A.23.29 – Dash display / Mid Mount Valve Module / Hydraulic Control Module: External Hydraulic Valve 2 Issue

Indicates a fault within the secondary remote hydraulic circuit (Spool Valve 2). The underlying condition is typically related to a connection problem on the hydraulic valve, an issue with the spool position sensor value, or a failure in communication between the valve module and the tractor's control systems.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Check hydraulic oil for contamination and inspect the hydraulic/transmission filter for blockages that could restrict oil flow

2. 2

   Inspect the wiring harness connecting the Dash to the Mid Mount Valve Module and the connector on External Hydraulic Valve 2 for corrosion, loose pins, or damaged wires

3. 3

   Verify the spool position sensor value using a diagnostic tool to ensure it is not returning out-of-range values

4. 4

   Ensure the hydraulic couplers are not blocked or damaged and that hoses are not restricted

1. 1

   Relieve System Pressure

   Turn off the tractor and actuate the hydraulic levers/controls to relieve any residual pressure in the hydraulic system before servicing the valve block.

2. 2

   Clean the Area

   Thoroughly clean the exterior of the hydraulic valve block (usually located at the rear or mid-mount depending on the loader configuration) to prevent dirt from entering the system.

3. 3

   Address Wiring Issues

   If the diagnostic checks revealed a wiring fault, repair or replace the damaged connector/harness leading to Valve 2.

4. 4

   Replace the Solenoid/Sensor

   If the spool position sensor or solenoid coil is faulty, unbolt the electronic slice/coil from the valve body and install the replacement part.

5. 5

   Replace the Spool Valve Slice

   If the valve itself is mechanically stuck or the internal electrics have failed, unbolt the specific Valve 2 slice from the valve bank. Install the new electric spool slice and torque the tie-rod bolts to OEM specifications.

6. 6

   Program the Valve

   Note that replacing an electric spool slice (e.g., part 3797234M6) requires the new unit to be programmed/calibrated to the tractor's ECU using a compatible Massey Ferguson diagnostic tool.

7. 7

   Clear Codes and Test

   Clear the 0A.23.29 DTC from the system and test the remote hydraulic functions under load to verify the repair.