Massey Ferguson 0A.73.13 – Onboard diagnostic system: External Hydraulic Valve 7 Issue

A malfunction, often electrical or a connection problem, associated with the 7th external hydraulic remote/spool valve on the tractor's hydraulic manifold. The system detects that the valve is not responding correctly to command signals.

• 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

   Visual & Electrical Inspection: Inspect the wiring harness leading to External Hydraulic Valve 7 for frayed wires, corrosion in the connector pins, or loose connections.

2. 2

   Solenoid Testing: Use a multimeter to check the resistance of the solenoid on Valve 7 and compare it to a known working valve (e.g., Valve 1 or 2) to determine if the coil has failed.

3. 3

   Hydraulic Fluid Check: Verify that the hydraulic fluid is at the correct level and free of debris, which could cause the spool valve to stick.

4. 4

   Code Clearing: Attempt to clear the DTC using a compatible Massey Ferguson diagnostic tool to see if the code is an active hard fault or a stored historical error.

1. 1

   Depressurize the System

   Turn off the tractor and cycle the hydraulic controls to relieve any residual pressure in the external hydraulic system.

2. 2

   Locate Valve 7

   Identify External Hydraulic Valve 7 on the rear hydraulic manifold block.

3. 3

   Disconnect Electricals

   Carefully unplug the electrical connector from the valve's solenoid.

4. 4

   Remove the Valve

   Unbolt the retaining bolts holding the spool valve to the hydraulic block. Have a catch pan ready, as some hydraulic fluid will leak out.

5. 5

   Inspect/Replace

   If the issue is a failed O-ring or a stuck spool, you may be able to clean and reseal it. If the solenoid or internal valve body is faulty, replace the entire valve assembly.

6. 6

   Reinstall

   Install the new valve with new O-rings. Torque the mounting bolts to the OEM specifications.

7. 7

   Reconnect and Test

   Plug the electrical connector back in. Start the tractor, top up the hydraulic fluid if necessary, and test the operation of the 7th remote.

8. 8

   Clear Codes

   Use a diagnostic tool to clear code 0A.73.13 from the system.