Massey Ferguson A.20.21 – Dash display / Hydraulic Valve Module: External Hydraulic Valve 2 Issue

Malfunction in the circuit for the second rear remote hydraulic spool valve. The underlying condition is typically an electrical connection problem on the hydraulic valve, a loss of communication, or an out-of-range value coming from the spool position sensor.

• 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 through 7726S

1. 1

   Visual Inspection: Check for an obvious physical connection problem on the External Hydraulic Valve 2 located at the rear remote stack.

2. 2

   Sensor Value Check: Use a compatible Massey Ferguson diagnostic tool to monitor the spool position sensor value. Check if the value is erratic, stuck, or missing.

3. 3

   Communication Check: Verify that there is active CAN communication between the Dash and the Valve Module, as a broken data wire can trigger valve-specific faults.

1. 1

   Locate the Valve

   Identify External Hydraulic Valve 2 in the rear remote valve block.

2. 2

   Inspect Wiring

   Disconnect the electrical harness at the valve. Inspect the pins for corrosion, moisture ingress, or pushed-back terminals, which are common causes of connection problems.

3. 3

   Test the Sensor

   If the wiring is intact, the issue is likely the spool position sensor. Test the sensor's resistance/voltage against OEM specs.

4. 4

   Replace Component

   If the sensor is faulty or the valve solenoid has failed internally, replace the spool position sensor or the affected valve slice.

5. 5

   Clear Codes

   Reconnect the harness and use a compatible diagnostic interface device to clear the DTCs from the tractor's memory.