Massey Ferguson A.8X.29: External Hydraulic Valve 8 Issue

Malfunction, electrical fault, or communication error with the 8th external hydraulic spool valve (auxiliary remote valve) on the tractor's hydraulic system.

• 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 or interface device to confirm the 0A.8X.29 code and check for any secondary codes (such as 0A.8X.2A).

2. 2

   Inspect the wiring harness, plugs, and sockets leading to the #8 external hydraulic solenoid valve for damage, corrosion, or loose connections.

3. 3

   Test the solenoid coil for an electrical short circuit (either on the coils themselves or a short to ground) or an open circuit.

1. 1

   Isolate the Valve

   Locate the external hydraulic valve block at the rear of the tractor and identify the slice/spool corresponding to Valve 8.

2. 2

   Check the Solenoid Coil

   If the diagnostic checks reveal a short circuit in the solenoid coil, remove the retaining nut and slide the coil off the valve stem.

3. 3

   Replace the Coil/Valve

   Replace the faulty solenoid coil. If the internal mechanical spool is sticking or leaking, the spool slice itself or its seals may need to be rebuilt using an OEM repair kit.

4. 4

   Programming

   If the entire electric spool slice is replaced, the new unit must be programmed/calibrated to the tractor's ECU using a dealer diagnostic tool.

5. 5

   Clear Codes

   Clear the DTCs from the system and test the hydraulic remote for proper operation.