Massey Ferguson A.23.27 – SMS (Spool Management System) or Autotronic: External Hydraulic Valve 2 Issue

Malfunction associated with the tractor's second remote hydraulic spool valve. The underlying condition can be electrical (such as a solenoid circuit open or shorted to ground), mechanical (a stuck valve due to debris or internal wear), or a calibration issue with the electrohydraulic controls.

• 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

   Inspect the hydraulic oil for contamination (dirt or debris) and check the hydraulic/transmission filters for restricted flow

2. 2

   Check the solenoid connector at Valve 2 for harness rub points, test coil resistance, and verify ground integrity to rule out electrical shorts or open circuits

3. 3

   Check if the valve is physically sticking or jamming due to internal wear or debris

4. 4

   Use the Massey Ferguson EDT (Electronic Diagnostic Tool) to check if the position of the joystick is visible to the system and verify calibration

1. 1

   Inspect and Service Fluids

   Begin by checking the hydraulic fluid level and quality. If the oil is dirty or the filter is old, replace the hydraulic/transmission filter and fluid.

2. 2

   Wiring Repair

   If the electrical inspection revealed damaged wires or a corroded connector at the Valve 2 solenoid, repair the harness and clean the contacts. Clear the code and test operation.

3. 3

   Recalibrate the System

   Connect the Massey Ferguson EDT (Electronic Diagnostic Tool). Navigate to the SMS/Spool Valve settings and perform a calibration procedure for the joystick and the electrohydraulic spool valve.

4. 4

   Valve Cleaning/Rebuild

   If the valve is mechanically stuck, remove the spool valve assembly. Clean the valve chamber thoroughly. You may be able to rebuild it using an OEM spool valve repair kit.

5. 5

   Component Replacement

   If the electrohydraulic valve slice is internally damaged, shorted, or cannot be calibrated, replace the entire electric spool slice. Note: A new electric spool slice will need to be programmed to the tractor using the EDT after installation.