Massey Ferguson A.20.1F – Autotronic Module or Mid Mount / Hydraulic Valve Module: External Hydraulic Valve 2 Issue

Malfunction in the second electrohydraulic spool valve (SCV) circuit. Typically caused by a connection problem or open/short circuit on the wiring harness, a spool position sensor reading out of range, or a mechanically stuck valve spool that cannot return to neutral.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 4707
• 4708
• 4709
• 4710
• 6400 Series
• 6600 Series
• 7400 Series
• 7700 Series
• 5700SL Series

1. 1

   Check the Valve LED Indicator on the physical electrohydraulic valve block at the rear of the tractor (flashing indicates a sub-fault)

2. 2

   Access onboard dash diagnostics via the Autotronic system to pull deeper DC/TC codes

3. 3

   Inspect the 4-pin connector and wiring harness going to External Hydraulic Valve 2 for pinched wires, corrosion, or pushed-out pins

4. 4

   Verify if the external linkage is in the center position to ensure the valve spool is not mechanically jammed

1. 1

   Isolate the Fault

   Swap the electrical connector from Valve 2 to Valve 1 or 3 (if accessible and safely possible) to see if the error code follows the wiring harness or stays with the physical valve slice.

2. 2

   Clean and Repair Harness

   If the fault is in the wiring, clean the contacts with electrical contact cleaner and repair any broken wires in the loom leading to the Autotronic/Valve module.

3. 3

   Inspect/Repair Detents

   If the valve is mechanically failing to return to neutral, the spool valve detents may be worn and can be modified or replaced independently on some models.

4. 4

   Replace the Valve Slice

   If the internal spool position sensor or the slice head electronics have failed, the individual electric spool slice must be replaced.

5. 5

   Reprogramming

   Install the new electrohydraulic spool valve slice and calibrate/program it to the tractor's Autotronic system using a Massey Ferguson dealer diagnostic tool (EDT).