Massey Ferguson A.13.24 – Onboard Diagnostic System / Hydraulic Control Module: External Hydraulic Valve 1 Issue

Malfunction in the first external hydraulic spool valve (distributor valve). The underlying condition is typically a connection problem, a faulty spool valve position sensor value, or a mechanical jamming/sticking of the valve that prevents it from properly regulating the flow and pressure of hydraulic fluid to external implements.

• 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

   Check the hydraulic fluid (UTTO) level and condition. Dark, burnt, or milky fluid can cause valve sticking and requires a fluid and filter change.

2. 2

   Inspect External Valve 1 for visible leaks around the valve body, quick couplers, and hydraulic hoses.

3. 3

   Check the wiring harness and electrical connections to the valve's solenoid and spool position sensor. The code is frequently triggered by a simple connection problem or a failed position sensor.

4. 4

   Use a hydraulic gauge to test the system pressure at the remote connection to determine if the valve is failing to hold pressure or if the relief valve is bypassing.

5. 5

   Test if the valve is physically jammed by debris or internal wear, which can cause unresponsive hydraulic controls.

1. 1

   Depressurize

   Turn off the tractor, lower all implements to the ground, and actuate the hydraulic levers to release any residual 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 during removal.

3. 3

   Disconnect Electricals

   Unplug the wiring harness from the valve's solenoid coil and spool position sensor.

4. 4

   Remove Hoses

   Mark and disconnect the hydraulic lines/hoses connected to Valve 1. Cap the lines immediately to prevent fluid loss and contamination.

5. 5

   Remove the Valve

   Unbolt the faulty spool valve/slice from the main hydraulic distributor block.

6. 6

   Rebuild or Replace

   Either install a new electric spool slice or rebuild the existing valve using an OEM distributor repair kit (replacing internal O-rings and seals).

7. 7

   Reinstallation

   Bolt the new/rebuilt valve back into the block, reconnect the hydraulic lines, and plug in the electrical connectors.

8. 8

   Test and Clear

   Top off the hydraulic fluid, start the tractor, and cycle the valve to bleed any air. Check for leaks. Finally, use a compatible diagnostic tool to clear the A.13.24 DTC from the system.