Massey Ferguson A.80.20 – Electronic Hydraulic Remote (EHR) / Tractor Control Module (TCM): External Hydraulic Valve 8 Issue

Malfunction, electrical fault, or mechanical binding in the 8th external hydraulic remote (spool valve) circuit.

• 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

   Verify the hydraulic oil level and check for contamination or degraded fluid, which can cause spool valves to stick.

2. 2

   Inspect External Hydraulic Valve 8 at the rear remote block for visible leaks, physical damage, or loose fittings.

3. 3

   Check the wiring harness and electrical connector going to the Valve 8 solenoid for corrosion, broken wires, or loose pins.

4. 4

   Test the solenoid coil resistance with a multimeter and verify that the controller is sending the correct voltage to the valve when actuated from the cab.

5. 5

   Check if the spool valve is mechanically stuck due to internal drag or debris.

1. 1

   Make the Machine Safe

   Lower all implements to the ground, turn off the engine, and actuate the hydraulic levers/controls to relieve all residual hydraulic system pressure.

2. 2

   Disconnect Electricals

   Unplug the wiring harness connector from the Valve 8 solenoid.

3. 3

   Remove Hydraulic Lines

   Disconnect the hydraulic hoses/lines attached to the valve. Cap all open lines and ports immediately to prevent dirt from entering the hydraulic system.

4. 4

   Dismount the Valve

   Unbolt the external hydraulic valve assembly from the rear hydraulic block.

5. 5

   Rebuild or Replace

   To Rebuild: Remove the side covers/screws, extract the spool, and replace all internal O-rings and seals using an OEM spool valve repair kit. Clean all components thoroughly before reassembly. To Replace: Mount the new complete hydraulic valve assembly to the block.

6. 6

   Reassembly

   Reconnect the hydraulic lines and plug in the electrical connector.

7. 7

   Test and Clear

   Top off the hydraulic fluid if any was lost. Start the tractor, bleed the system by cycling the remote, check for leaks, and use a compatible diagnostic tool to clear the 0A.80.20 DTC.