Massey Ferguson 0A.31.1E – Electronic Hydraulic Remote (EHR) Control Module or Hitch/Hydraulic ECU: External Hydraulic Valve 3 Issue

Indicates a malfunction within the circuit or mechanical operation of the third rear external hydraulic remote (spool valve). This is typically triggered by a signal voltage irregularity, a failed electronic actuator/solenoid on the valve, or a communication error between the valve and the tractor's electronic hydraulic system.

• 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

   Verify Controls: Test the operation of the #3 hydraulic remote using both the in-cab joystick/fingertip controls and the external mudguard switches to see if the issue is isolated to a specific input.

2. 2

   Inspect Wiring & Connectors: Check the electrical connector at the #3 external hydraulic valve actuator (located at the rear remote valve stack) for moisture, corrosion, or bent pins. Inspect the wiring harness for chafing or shorts to ground.

3. 3

   Test Solenoid Resistance: Use a multimeter to test the resistance of the solenoid coil on the #3 valve. Compare the reading to the adjacent working valves (e.g., Valve 2 or 4).

4. 4

   Swap Test: Temporarily swap the electrical connector from Valve 3 to Valve 2. If the fault code changes to the Valve 2 circuit, the issue is in the wiring or ECU. If the fault remains on Valve 3, the electronic actuator or the valve itself has failed.

1. 1

   Relieve Pressure

   Park the tractor on a level surface, lower all implements, turn off the engine, and cycle the hydraulic controls to relieve all residual hydraulic pressure in the system.

2. 2

   Clean the Area

   Thoroughly clean the rear remote valve stack with brake cleaner or compressed air to prevent dirt from entering the hydraulic system during disassembly.

3. 3

   Disconnect Harness

   Unplug the electrical connector from the #3 spool valve actuator.

4. 4

   Remove the Valve

   Remove the tie-bolts or retaining bolts that hold the #3 spool valve section to the main valve block.

5. 5

   Separate the Assembly

   Carefully separate the #3 valve from the stack. Be extremely careful not to lose or damage the interconnecting O-rings between the valve slices.

6. 6

   Replace Components

   If diagnostics pointed to a failed actuator, replace the solenoid unit. If the spool is mechanically binding or internally scored, replace the entire #3 valve section.

7. 7

   Reassembly

   Install the new valve or actuator using new O-rings lubricated with clean hydraulic fluid.

8. 8

   Torque

   Re-torque the valve stack retaining bolts to the manufacturer's specified torque to prevent leaks or spool binding.

9. 9

   Clear Codes

   Reconnect the electrical harness, start the tractor, check for leaks, and use a compatible Massey Ferguson diagnostic tool to clear the 0A.31.1E DTC. Test the remote for proper operation.