Massey Ferguson 0A.6X.20 – Autotronic module (e.g., Autotronic 4 or 5) or Implement/Hydraulic Control Unit: External Hydraulic Valve 6 Issue

Malfunction in the circuit, solenoid, or mechanical operation of the 6th external remote hydraulic spool valve. Common underlying conditions include an open circuit, a short to ground, a short to power in the solenoid circuit, or a mechanical issue such as a stuck valve spool preventing proper fluid flow.

• 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
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Verify the hydraulic fluid (UTTO) level and condition, and check for a blocked hydraulic filter which can restrict oil flow.

2. 2

   Inspect the wiring harness leading to the Valve 6 solenoid for rub points, damaged wires, or corrosion at the connector.

3. 3

   Use a multimeter to check the solenoid coil resistance and verify ground integrity to ensure there is no open circuit or short to ground.

4. 4

   Check for external leaks around the valve block and determine if the valve spool is physically sticking or jammed due to debris or internal wear.

1. 1

   Safety First

   Shut off all power to the equipment, lower all hydraulic implements to the ground to relieve system pressure, and disconnect the battery.

2. 2

   Clean the Area

   Thoroughly clean the exterior of the hydraulic valve block to prevent dirt from entering the hydraulic system during disassembly.

3. 3

   Disconnect Electricals

   Unplug the electrical connector from the Valve 6 solenoid.

4. 4

   Remove the Solenoid/Valve

   Depending on the diagnosis, remove the retaining bolts for the solenoid coil or the entire spool valve assembly.

5. 5

   Inspect and Clean

   If the valve is sticking, inspect the spool for scoring or debris. Replace worn O-rings and seals. If the solenoid failed the multimeter test, discard the faulty solenoid.

6. 6

   Install New Parts

   Fit the replacement solenoid or complete electric spool valve. Torque the retaining bolts to the manufacturer's specifications.

7. 7

   Reassemble and Test

   Reconnect the wiring harness. Top up the hydraulic fluid (UTTO) if any was lost, and change the hydraulic filter if it is due for service (every 300-500 hours).

8. 8

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool to clear the 0A.6X.20 DTC from the system and test the remote valve operation.