Massey Ferguson 0A.31.18: External Hydraulic Valve 3 Issue

Indicates a malfunction, fault, or connection problem within the circuit of the third external hydraulic remote valve (spool valve).

• 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

   Use a compatible diagnostic tool to retrieve the code and confirm if it is active or stored

2. 2

   Inspect the wiring harness and the electrical connector plugging into the solenoid of External Valve 3 for corrosion, backed-out pins, or wire chafing

3. 3

   Check the ½” ISO 5675 female quick couplers at the rear remote for physical damage or blockages that could be causing severe back-pressure

1. 1

   Locate the Valve

   The external hydraulic valve block is typically mounted directly on the lift cover under the seat at the rear of the tractor.

2. 2

   Relieve Pressure

   Ensure the tractor is off, implements are lowered, and all hydraulic pressure is relieved from the system before uncoupling lines.

3. 3

   Disconnect Lines

   Remove the hydraulic hoses and disconnect the electrical harness from the Valve 3 section.

4. 4

   Remove the Valve

   Unbolt the faulty spool valve section from the hydraulic manifold/lift cover.

5. 5

   Install New Valve

   Bolt the replacement spool valve into place. Ensure all O-rings and seals (NBR or FPM seals) are properly seated to prevent leaks.

6. 6

   Reassembly

   Reconnect the hydraulic lines and the electrical connector.

7. 7

   Clear Codes

   Use your diagnostic interface to clear code 0A.31.18 and test the hydraulic remote to ensure proper flow and pressure.