Massey Ferguson 0A.8X.1B: External Hydraulic Valve 8 Issue

Indicates a fault in the hydraulic control system, such as connection problems, open circuits, or abnormal amp draws (high/low) on the electro-hydraulic valve solenoids.

• 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 wiring harness and connector leading to External Hydraulic Valve 8 (usually located at the rear remote valve stack) for corrosion, damaged pins, or frayed wires

2. 2

   Test the solenoid on Valve 8 for an open circuit or improper resistance. Compare the amp draw and resistance readings to a known good valve (like Valve 1 or 2)

3. 3

   Ensure hydraulic fluid levels are correct and filters are not clogged, as fluid starvation can sometimes cause valve actuation issues

1. 1

   Relieve Pressure

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

2. 2

   Disconnect Electrical

   Unplug the electrical harness connector from the Valve 8 solenoid.

3. 3

   Remove the Valve/Solenoid

   Depending on the failure, either unbolt the specific solenoid coil or remove the entire spool valve assembly from the rear hydraulic stack. Have a bucket ready, as hydraulic fluid will leak during this process.

4. 4

   Install New Parts

   Install the replacement solenoid or spool valve. Ensure all O-rings (e.g., OEM part 195561M1) are seated correctly to prevent leaks.

5. 5

   Reassemble and Test

   Reconnect the electrical harness, top off the hydraulic fluid, start the tractor, and clear the DTCs using a compatible diagnostic tool. Test the remote to ensure proper operation.