Massey Ferguson A.13.1B – Mid Mount Valve Module or Dash Control Unit: External Hydraulic Valve 1 Issue

Malfunction in the control, electrical circuit, or mechanical operation of the first external hydraulic remote valve. This can be triggered by a signal out of range, a circuit problem (open circuit or short to ground/power), or a mechanical condition such as low hydraulic pressure or a spool position out of range.

• 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

   Verify that the hydraulic fluid is clean and at the proper level, as dirty or low fluid can cause premature solenoid failure or sticking valves.

2. 2

   Check for visible hydraulic fluid leaks around External Valve 1.

3. 3

   Inspect the solenoid connector and harness for rub points, open circuits, or shorts to ground.

4. 4

   Check the spool position sensor value and ensure there is no communication loss between the dash and the valve module.

5. 5

   Check if the valve is sticking or jamming due to internal wear or debris.

1. 1

   Safety First

   Relieve the hydraulic system pressure and disconnect the tractor's battery before starting work.

2. 2

   Locate the Valve

   Find External Hydraulic Valve 1, which typically mounts to the transmission housing or the mid-mount valve block where the hydraulic lines connect.

3. 3

   Removal

   Disconnect the electrical harness from the solenoid/spool position sensor. Remove the retaining bolts and bracket holding the valve or solenoid in place.

4. 4

   Installation

   Install the direct replacement solenoid valve or spool assembly. Note: Leave the mounting bracket loose until all hydraulic hoses are threaded and tightened to ensure proper alignment.

5. 5

   Reassembly

   Reconnect the electrical harness, restore battery power, and top off the hydraulic fluid if any was lost during the swap.

6. 6

   Clear Codes

   Delete the error code from the control unit dashboard to unlock the valves and restore function.