Massey Ferguson 0A.21.1F: External Hydraulic Valve 2 Issue

Triggered when the control unit detects a signal out of range, a circuit problem, or a mechanical system condition it cannot correct regarding the second external hydraulic remote valve. The underlying condition is typically an electrical circuit issue, a sensor signal issue, or a mechanical fault like a stuck 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
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Verify that the tractor is not experiencing low voltage during cranking, weak charging, or poor grounds, which can throw false codes.

2. 2

   Inspect the wiring harness leading to External Hydraulic Valve 2 for rub points, frayed wires, or shorts to ground, and check the solenoid connector for corrosion or loose pins.

3. 3

   Measure the resistance of the valve's solenoid coil to ensure it is not internally open or shorted.

4. 4

   Check if the spool position sensor value is reading correctly or if the voltage is too low/high.

1. 1

   Isolate the Valve

   Locate External Hydraulic Valve 2 on the rear remote stack.

2. 2

   Address Wiring Faults

   If the diagnostic checks reveal a damaged harness or corroded connector, repair the wiring or replace the pigtail connector.

3. 3

   Replace the Solenoid/Coil

   If the coil resistance test fails (open or shorted), remove the retaining nut on the end of the valve spool and replace the electronic solenoid coil.

4. 4

   Address Mechanical Sticking

   If the electrical circuit is fully intact, the valve spool itself may be mechanically stuck due to contamination or internal wear. Remove the valve assembly, clean it, and inspect the spool for scoring.

5. 5

   Replace the Valve Assembly

   If the valve is permanently stuck, severely malfunctioning, or leaking internally, the entire hydraulic spool valve assembly must be replaced.

6. 6

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool to clear the DTCs and cycle the hydraulics to ensure the code does not return.