Massey Ferguson A.10.29 – Mid Mount Valve Module or Hydraulic Control Module: External Hydraulic Valve 1 Issue

Indicates a malfunction, communication failure, or sensor error associated with the first external hydraulic remote valve (spool valve). It often points to an issue with the spool position sensor, which provides electronic feedback to the tractor's brain regarding the exact position of the hydraulics.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 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 implement behavior to see if the three-point hitch fails to maintain a set depth or if implements 'hunt' up and down

2. 2

   Inspect the wiring harness and connectors leading to External Hydraulic Valve 1 and its position sensor

3. 3

   Check for moisture ingress or corrosion inside the sensor connectors, as this is a primary cause of sensor failure

4. 4

   Use a compatible diagnostic tool to verify the spool position sensor value, checking for out-of-range or erratic live data

1. 1

   Locate the Sensor/Valve

   Locate External Hydraulic Valve 1 and the hydraulic lift cover position sensor (which mounts directly in the hydraulic lift cover to monitor hitch/valve position).

2. 2

   Clean and Prep

   Disconnect the battery. Thoroughly clean the electrical connections and the mounting area to prevent dirt from entering the hydraulic system.

3. 3

   Replace the Sensor/Valve

   If the sensor is faulty, remove it and install the replacement. Ensure that all O-rings and seals are properly seated to prevent moisture ingress. If the valve itself is mechanically damaged, replace the spool valve assembly or rebuild it using an OEM repair kit.

4. 4

   Recalibrate the System

   The tractor will likely need recalibration after the installation of a new position sensor or valve to work properly. You must perform the hydraulic setup/calibration procedure using a dealer diagnostic tool or the sequence outlined in the OEM service manual.

5. 5

   Clear Codes

   Use a diagnostic tool to clear the 0A.10.29 DTC from the module.