Massey Ferguson 0A.43.19 – Mid Mount Valve Module or Hydraulic Control Module: External Hydraulic Valve 4 Issue

Indicates a fault, such as a connection problem, electrical short, or mechanical failure, within the circuit or physical assembly of the 4th external hydraulic 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

   Inspect the electrical harness and connector plugging into External Hydraulic Valve 4 for corrosion, bent pins, or moisture

2. 2

   Trace the wiring back to the Mid Mount Valve Module / ECU to check for chafing, shorts to ground, or open circuits

3. 3

   Test the resistance (ohms) of the valve's solenoid to ensure it is within OEM specifications

4. 4

   Use a compatible diagnostic tool to clear the code and cycle the hydraulic controls to see if the code returns as an active fault

1. 1

   Relieve Pressure

   Turn off the tractor and cycle the hydraulic levers/joysticks to relieve all trapped hydraulic pressure in the system.

2. 2

   Clean the Area

   Thoroughly clean the area around the external hydraulic valve block to prevent dirt from entering the hydraulic system.

3. 3

   Disconnect Electrical

   Unplug the wiring harness connector from Valve 4.

4. 4

   Remove Lines

   Mark and disconnect the hydraulic lines attached to the valve. Cap the lines immediately to prevent fluid loss and contamination.

5. 5

   Unbolt Valve

   Remove the mounting bolts securing Valve 4 to the hydraulic block or lift cover.

6. 6

   Install New Valve

   Mount the replacement valve, ensuring all O-rings and seals are properly seated. Torque bolts to OEM specifications.

7. 7

   Reconnect

   Reattach the hydraulic lines and plug in the electrical connector.

8. 8

   Bleed and Test

   Top off hydraulic fluid if necessary, start the tractor, check for leaks, and test the operation of the 4th remote to ensure the code is resolved.