Massey Ferguson A.40.29 – Onboard diagnostic system: External Hydraulic Valve 4 Issue

Indicates a fault or malfunction associated with the 4th external hydraulic remote valve (spool valve), often an electrical or communication-based connection problem.

• 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 diagnostic tool or interface device to confirm the code and check for any related electrical codes (like 0A.41.FF)

2. 2

   Inspect the electrical connections and wiring harness leading to External Hydraulic Valve 4 for damage, corrosion, or loose pins

3. 3

   Consult the specific tractor's service manual to find the exact pinout testing procedures for the spool valve

1. 1

   Repair wiring harness

   Address the connection issue by repairing the wiring harness.

2. 2

   Replace spool valve assembly or cable

   Replace the faulty spool valve assembly or cable.

3. 3

   Consult service manual

   Consult with a qualified technician or the official service manual for the exact removal and installation steps.