Massey Ferguson 0A.41.1B: External Hydraulic Valve 4 Issue

The tractor's system has detected an electrical or mechanical fault—likely a poor connection, wiring issue, or cable failure—preventing proper communication with or operation of the #4 rear remote/spool valve.

• 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

   Retrieve and verify codes using a compatible diagnostic tool to confirm 0A.41.1B is active and look for accompanying connection codes like 0A.41.FF

2. 2

   Visually inspect the wiring harness and electrical connector at External Hydraulic Valve 4 (Spool Valve 4) at the rear of the tractor for corrosion, backed-out pins, or damaged wires

3. 3

   For models utilizing mechanical spool valve cables with electronic monitoring, inspect the spool valve cable for binding, stretching, or breakage

1. 1

   Depressurize the System

   Ensure the tractor is off and hydraulic pressure is relieved from the rear remotes before servicing.

2. 2

   Repair Wiring/Connections

   If the diagnostic check revealed a broken wire or corroded connector at Valve 4, clean the contacts with electrical contact cleaner or splice/repair the damaged harness section.

3. 3

   Replace the Spool Valve Cable

   If the valve is cable-actuated and the cable is seized, disconnect the cable at the lever and the valve block, route the new OEM cable, and secure it.

4. 4

   Replace Valve Components

   If the valve itself is internally faulty or leaking, remove the retaining bolts on the spool valve block. Replace the faulty spool valve coupling, O-rings, or the entire valve section as needed.

5. 5

   Clear Codes

   Reconnect the diagnostic tool and clear the DTCs to verify the repair.