Massey Ferguson A.71.19 – Onboard diagnostic system: External Hydraulic Valve 7 Issue

Malfunction associated with the 7th external hydraulic remote (spool valve), typically caused by an electrical connection problem (such as a wiring fault or corroded connector at the valve solenoid) or an internal mechanical failure of the spool valve itself.

• 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

   Use a compatible Massey Ferguson diagnostic tool to retrieve and confirm the active 0A.71.19 DTC

2. 2

   Check the wiring harness and electrical connector leading to External Hydraulic Valve 7 for connection problems

3. 3

   Inspect the spool valve detents for wear, which is a known issue on models like the 7600 series

4. 4

   Verify hydraulic fluid levels and inspect the valve block for any external leaks or physical damage

1. 1

   Power Down

   Turn off the tractor and disconnect the battery to prevent electrical shorts during repair.

2. 2

   Clean and Repair Connections

   Disconnect the electrical plug at External Hydraulic Valve 7. Clean the contacts with electrical contact cleaner. If the wiring is frayed or the connector is heavily corroded, splice in a replacement connector harness.

3. 3

   Address Valve Detents

   If the valve is mechanically failing to hold position, check the detents. Note: While Massey Ferguson often recommends replacing the entire valve assembly, detents from the 7600 series can sometimes be sourced and modified to fit, saving significant repair costs.

4. 4

   Replace the Valve

   If the solenoid has failed internally or the spool valve is beyond repair, remove the hydraulic lines (have a bucket ready to catch fluid) and unbolt the faulty External Hydraulic Valve 7. Install the new spool valve assembly.

5. 5

   Reassembly and Clearing Codes

   Reconnect all hydraulic lines and electrical connections. Reconnect the battery. Use the diagnostic tool to clear the 0A.71.19 fault code from the system.

6. 6

   Test

   Start the tractor, operate the 7th remote valve, and check for leaks and proper implement operation.