Massey Ferguson 0A.80.2A – TCU: External Hydraulic Valve 8 Issue

Fault code 0A.80.2A indicates that the tractor's onboard diagnostic system has detected a fault in the circuit or operation of the 8th external hydraulic remote valve (spool valve). The underlying condition is typically an electrical fault, such as an open circuit, a short to ground, or a short to power, or a mechanical/hydraulic condition, such as a stuck valve, implausible position reading, or low pressure, that prevents the valve from operating properly.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Check the solenoid connector for External Hydraulic Valve 8 for harness rub points, damaged wires, or corrosion.

2. 2

   Test the solenoid coil resistance with a multimeter and verify ground integrity to rule out an open circuit or short to ground.

3. 3

   Verify that the hydraulic fluid is clean and at the proper level, as dirty or low fluid can cause premature solenoid failure or prevent adequate pressure.

4. 4

   Check if the valve spool is physically stuck or if there is a mechanical condition preventing the valve from shifting.

1. 1

   Relieve pressure and disconnect battery

   Relieve all hydraulic system pressure and disconnect the tractor's battery before starting work.

2. 2

   Locate External Hydraulic Valve 8

   Locate External Hydraulic Valve 8, which is typically mounted on the rear remote valve stack on the transmission housing.

3. 3

   Disconnect electrical harness

   Disconnect the electrical wiring harness connector from the faulty solenoid.

4. 4

   Remove the valve assembly

   Unbolt the solenoid/spool valve assembly from the hydraulic block. Be prepared to catch any residual hydraulic fluid.

5. 5

   Prepare mounting surface

   Clean the mounting surface thoroughly and ensure all old O-rings are removed.

6. 6

   Install replacement part

   Install the replacement spool valve or solenoid using new O-rings. Torque the mounting bolts to the manufacturer's specifications.

7. 7

   Reconnect and test

   Reconnect the electrical harness, reconnect the battery, and clear the DTCs using a compatible Massey Ferguson diagnostic tool. Test the hydraulic function to ensure smooth operation and check for leaks.