Massey Ferguson A.70.19 – Implement/hydraulic control module or main vehicle ECU: External Hydraulic Valve 7 Issue

Fault, connection problem, or malfunction specifically related to the 7th external hydraulic remote valve on the tractor. This can be triggered by an electrical circuit issue (such as an open circuit, short to ground, or short to power at the solenoid) or a mechanical issue where the valve fails to return to its neutral position.

• 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 the solenoid connector on External Valve 7 for dirt, corrosion, or moisture

2. 2

   Inspect the wiring harness leading to the valve for rub points, breaks, or shorts to ground

3. 3

   Test the solenoid coil resistance with a multimeter and verify ground integrity

4. 4

   Check if the main hydraulic distributor is mechanically stuck and failing to return to the neutral position

5. 5

   Stop and restart the engine to see if the system resets (note: valve may remain electronically blocked until cleared with a tool)

1. 1

   Relieve Pressure

   Ensure the tractor is turned off and relieve all hydraulic pressure from the system before servicing the valves.

2. 2

   Access the Valve Block

   Locate the rear external hydraulic valve block. Identify Valve 7 (you can verify valve naming and assignments via the Datatronic 5 screen if equipped).

3. 3

   Repair Wiring/Solenoid

   If the diagnostic checks revealed a wiring fault, repair the damaged harness. If the solenoid coil failed the resistance test, remove the retaining nut and replace the solenoid coil.

4. 4

   Valve Spool Service

   If the valve is mechanically stuck or leaking internally, remove the valve assembly. Clean the spool and inspect for scoring. Replace the internal O-rings and seals using an OEM repair kit.

5. 5

   Reassembly

   Reinstall the valve vertically, ensuring thickness shims and O-rings are seated correctly so the tightening load is distributed evenly.

6. 6

   Clear Codes

   Reconnect the wiring, start the tractor, and use a Massey Ferguson-compatible diagnostic tool to clear the 0A.70.19 code from the dashboard control unit to unlock the valve.