Massey Ferguson A.30.2A: External Hydraulic Valve 3 Issue

Malfunction, electrical fault, or pressure/flow issue specifically isolated to the third auxiliary rear remote valve (spool valve).

• 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

   Check the UTTO hydraulic fluid level and condition (look for dark, burnt-smelling, or milky fluid indicating water contamination)

2. 2

   Inspect the hydraulic filter to ensure it has been changed within the last 300–500 hours, as 70% contamination restricts flow

3. 3

   Inspect the external control valve block, O-rings, and 1/2" ISO 5675 quick couplers for visible leaks

4. 4

   Perform a pressure and flow test using a diagnostic flowmeter and pressure gauge (e.g., AGCO MF 3001 pressure gauge kit and MF 3016 flowmeter kit) connected to the diagnostic coupler to verify if the issue is a weak pump or isolated to Valve 3

5. 5

   Inspect the wiring harness and solenoid connector specifically at External Valve 3 for corrosion, damage, or loose pins

1. 1

   Relieve Pressure

   Lower all implements to the ground and turn off the engine. Cycle the hydraulic levers/controls to relieve any residual pressure in the system.

2. 2

   Drain/Flush Fluid (If Contaminated)

   Drain the hydraulic fluid and replace the hydraulic filter. Never use non-original filters, as low-quality substitutes increase the risk of contamination entry by 35%.

3. 3

   Disconnect Valve 3

   Locate the external hydraulic valve stack at the rear of the tractor. Disconnect the hydraulic hoses and the electrical solenoid connector for Valve 3.

4. 4

   Remove the Valve

   Unbolt the Valve 3 section from the hydraulic control valve block/lift cover.

5. 5

   Install Replacement

   Mount the new or rebuilt external hydraulic remote valve. Replace any mating O-rings between the valve sections to prevent internal pressure loss.

6. 6

   Reassemble and Bleed

   Reconnect the hoses and electrical connections. Refill the system with OEM-approved UTTO fluid. Operate the tractor and cycle the remote valve to bleed air from the system, as aeration can cause spontaneous cylinder action and vibrations.

7. 7

   Clear Codes

   Use a compatible diagnostic tool to clear the 0A.30.2A code from the system.