Massey Ferguson A.71.24 – onboard diagnostic system: External Hydraulic Valve 7 Issue

Indicates a fault, typically an electrical connection problem or internal failure, on the 7th external hydraulic remote/spool valve.

• 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
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726

1. 1

   Check the hydraulic fluid level and condition. Dirty or low hydraulic fluid can cause premature solenoid or valve failure or sticking.

2. 2

   Inspect the wiring harness leading to the number 7 rear remote valve. Look for chafed wires, loose connector pins, or corrosion inside the plug.

3. 3

   Test the solenoid coil on Valve 7 for proper resistance using a multimeter. Verify that the solenoid is receiving the correct voltage when the valve is commanded to open or close from the cab.

4. 4

   If the valve stack allows, temporarily swap the solenoid coil from Valve 7 with an adjacent working valve to see if the fault code follows the coil or stays with the valve body and wiring.

1. 1

   Safety First

   Lower all implements to the ground, turn off the tractor, and relieve all hydraulic system pressure. Disconnect the tractor's battery.

2. 2

   Locate the Valve

   Identify External Hydraulic Valve 7 at the rear remote valve stack.

3. 3

   Disconnect Electricals

   Unplug the wiring harness connector from the faulty valve's solenoid.

4. 4

   Remove the Valve/Solenoid

   Remove the retaining bolts holding the solenoid or the entire spool valve slice to the hydraulic block.

5. 5

   Clean and Prep

   Clean the mating surface on the valve block. Ensure no dirt enters the hydraulic system.

6. 6

   Install New Part

   Install the replacement solenoid or spool valve. Ensure all new O-rings and seals are properly seated to prevent leaks.

7. 7

   Reassembly

   Torque the retaining bolts to the manufacturer's specifications and reconnect the electrical harness.

8. 8

   Test

   Reconnect the battery, start the tractor, and top off hydraulic fluid if any was lost. Cycle the #7 remote from the cab to ensure proper operation and check for leaks.

9. 9

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool to clear the 0A.71.24 DTC from the system.