Massey Ferguson 0A.50.19: External Hydraulic Valve 5 Issue

Malfunction associated with the 5th external hydraulic remote valve (spool valve), indicating an irregular electrical signal, a lack of response, or a communication failure with the electronic spool slice for Valve 5.

• 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

   Inspect the wiring harness and the electrical connector plugging into External Hydraulic Valve 5 for corrosion, loose pins, or damaged wires.

2. 2

   Verify the electrical integrity of the pilot pressure control and the electric spool slice.

3. 3

   Ensure the tractor's hydraulic fluid is at the correct level and free of heavy contamination that could cause the spool valve to stick.

4. 4

   Use a compatible Massey Ferguson diagnostic tool to clear the DTCs and operate the hydraulic remotes to see if code 0A.50.19 returns as an active fault.

1. 1

   Relieve Pressure

   Turn off the tractor and relieve all hydraulic pressure from the system before servicing the valves.

2. 2

   Access the Valve Block

   Locate the external hydraulic valve stack at the rear of the tractor. Identify Valve 5 in the slice assembly.

3. 3

   Disconnect Electronics

   Unplug the electrical connector from the electric spool slice for Valve 5.

4. 4

   Remove the Valve

   Unbolt the affected spool slice from the hydraulic block assembly. Be prepared with a catch pan, as residual hydraulic fluid will leak out.

5. 5

   Rebuild or Replace

   If rebuilding, use an OEM repair kit to replace the internal seals and O-rings. If replacing, install the new electric spool slice.

6. 6

   Reassembly

   Bolt the valve back into the stack, ensuring all seals are seated correctly. Reconnect the electrical harness.

7. 7

   Programming

   If a new electric spool slice was installed, it must be programmed to the tractor's computer using a dealer diagnostic tool.

8. 8

   Test

   Top off the hydraulic fluid, start the tractor, clear the codes, and test the remote valve for proper operation and leaks.