Massey Ferguson A.5X.28 – Mid Mount Valve Module / Auxiliary Hydraulic Control Module: External Hydraulic Valve 5 Issue

This fault code indicates a malfunction, communication failure, or electrical fault detected in the 5th auxiliary hydraulic remote valve (electric spool slice).

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 6480
• 6615
• 7495
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7726S

1. 1

   Use a compatible Massey Ferguson diagnostic tool to retrieve the exact hex code and confirm the fault is isolated to Valve 5.

2. 2

   Inspect the wiring harness and electrical connector at the External Hydraulic Valve 5 (located on the rear remote block or mid-mount block) for corrosion, moisture ingress, or damaged pins.

3. 3

   Verify that there is no broader communication loss between the Dash and the Mid Mount Valve Module, which can sometimes trigger false individual valve codes.

4. 4

   Test the pilot pressure control solenoid on the spool valve for proper resistance and verify it is receiving the correct voltage from the module.

1. 1

   Power down and disconnect battery

   Power down the tractor and disconnect the battery to ensure electrical safety.

2. 2

   Locate Valve 5

   Locate the external hydraulic valve block (typically at the rear remotes) and identify the specific slice corresponding to Valve 5.

3. 3

   Clean valve block area

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

4. 4

   Disconnect harness

   Disconnect the electrical harness from the Valve 5 electric spool slice.

5. 5

   Rebuild mechanical seals (if applicable)

   If the issue is a mechanical leak or sticking spool, disassemble the slice and rebuild it using an OEM spool valve repair kit.

6. 6

   Extract faulty slice (if electrical failure)

   If the electrical solenoid or internal sensor has failed (most common for this code), remove the tie-bolts holding the valve block together and carefully extract the faulty electric spool slice.

7. 7

   Install new spool slice

   Install the new electric spool slice, ensuring all O-rings are seated correctly, and torque the mounting bolts to factory specifications.

8. 8

   Reconnect electricals

   Reconnect the electrical harness and the battery.

9. 9

   Program and calibrate

   A new electric spool slice must be programmed/calibrated to the tractor's ECU using a dealer diagnostic tool. It will not function plug-and-play.

10. 10

    Clear DTCs and test

    Clear the DTCs and test the hydraulic remote for proper operation and flow.