Massey Ferguson A.80.24 – Onboard diagnostic system: External Hydraulic Valve 8 Issue

Malfunction in the electrohydraulic control circuit, the solenoid, or the mechanical spool operation of the 8th auxiliary remote hydraulic valve.

• 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

   Navigate to the hydraulics page on the Datatronic 5 terminal to verify the flow settings and status of Valve 8

2. 2

   Inspect the wiring harness, diagnostics connector, and the electrical connection to the electrohydraulic unit (solenoid valve) on the Valve 8 assembly

3. 3

   Verify that the 3-way pressure relief valve block is supplying the correct pilot pressure (21 to 24 bar) required to move the spool

4. 4

   Check the displacement sensor and the ON-OFF solenoid valve located on the end plate of the valve block for physical damage or electrical shorts

1. 1

   Relieve Pressure

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

2. 2

   Access the Valve Block

   Locate the auxiliary spool valve distribution block (typically mounted at the rear on the lift cover or hydraulic manifold).

3. 3

   Disconnect Electricals

   Unplug the wiring harness from the digital electronic system and the solenoid valve specific to Valve 8.

4. 4

   Remove the Valve

   Remove the securing bolts that hold the Valve 8 assembly to the base plate or distribution block. Carefully detach the valve, ensuring the standpipe or pilot tubes are not dislodged from their seats.

5. 5

   Replace Components

   Depending on the diagnostic results, replace the faulty ON-OFF solenoid, the pilot valve, or the entire electrohydraulic spool valve assembly.

6. 6

   Reinstall

   Fit the new valve or solenoid to the base plate. Ensure all O-rings and gaskets are correctly seated to prevent internal pressure leaks. Secure the assembly with the mounting bolts.

7. 7

   Clear Codes

   Reconnect the hydraulic lines and electrical harnesses. Use a compatible Massey Ferguson diagnostic tool to clear the 0A.80.24 DTC from the system.