Massey Ferguson 0A.20.2A – Mid Mount Valve Module or Hydraulic Control Module: External Hydraulic Valve 2 Issue

Malfunction in the second external remote hydraulic valve (spool valve) circuit. The underlying condition is typically related to a spool position sensor value error, a failure of the valve to reach its commanded position, or an electrical connection problem at the valve itself.

• 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
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Inspect the wiring harness and connectors at External Hydraulic Valve 2 for corrosion or connection problems. Use a diagnostic tool to read the live 'Spool Position Sensor Value' to see if the sensor is registering movement.

2. 2

   Check the hydraulic/transmission oil for contamination and ensure the hydraulic filters are not blocked, as dirty oil can cause the spool valves to stick.

3. 3

   Perform a spool leakage check by positioning the control handle in 'Neutral', connecting a hydraulic hand pump to the control valve port, and pressurizing the port to 2500 psi. If the port cannot hold pressure, oil is leaking around the spool.

1. 1

   Relieve Pressure

   Ensure the tractor is off, implements are lowered, and all hydraulic system pressure is relieved. Position the control handles in 'Neutral'.

2. 2

   Disconnect

   Disconnect the electrical harness from the External Hydraulic Valve 2 position sensor and solenoids. Disconnect the hydraulic hoses from the valve block.

3. 3

   Remove & Inspect

   Unbolt and remove the auxiliary control valve assembly. Disassemble, clean, and inspect the valve to ensure no foreign contamination is causing the spool to stick.

4. 4

   Re-test

   Reassemble the cleaned valve and repeat the 2500 psi leakage check. If no pressure can be obtained, the internal bore is damaged and the valve must be replaced.

5. 5

   Replace

   Install the new spool valve assembly and reconnect all hydraulic and electrical lines.

6. 6

   Calibrate

   Once an electronic spool valve is replaced with a new one, you must use a compatible diagnostic tool (such as Jaltest AGV or the OEM dealer tool) to assign the new valve its position and calibrate it to the tractor's system. Clear the 0A.20.2A DTC.