Massey Ferguson A.43.28 – Onboard diagnostic system: External Hydraulic Valve 4 Issue

Indicates a fault or connection problem specifically isolated to the 4th external hydraulic remote/spool valve on the tractor.

• 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 to confirm the presence of code 0A.43.28

2. 2

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

3. 3

   Consult the specific tractor's service manual to interpret the exact electrical values expected at the valve

1. 1

   Repair or replace

   Repair or replace the damaged wiring/connector to Valve 4 if a connection issue is found.

2. 2

   Replace

   If the wiring is intact, replace the faulty External Hydraulic Valve 4 (Spool Valve) assembly.

3. 3

   Clear DTCs

   Clear the DTCs using a compatible diagnostic interface device after the repair is completed.