Massey Ferguson 0A.41.1A – EHR (Electronic Hitch/Hydraulic Record) or Autotronic: External Hydraulic Valve 4 Issue

Malfunction in the fourth auxiliary remote hydraulic spool valve at the rear of the tractor, indicating an electrical communication failure (wiring/solenoid issue) or a mechanical sticking/jamming of the spool valve that prevents it from responding to electronic commands.

• 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 leading to External Valve 4 for frayed wires, corroded pins, or a loose connector at the valve's solenoid (electrical communication failure cause)

2. 2

   Test if the valve is mechanically jammed or unresponsive to manual override (if equipped) due to debris or internal wear (mechanical sticking cause)

3. 3

   Inspect the valve block for visible hydraulic fluid leaks, which can cause pressure drops and erratic behavior

4. 4

   Ensure the tractor has the correct level of UTTO (Universal Tractor Transmission Oil) and check that hydraulic filters are not clogged with metal shavings or debris

1. 1

   Depressurize the System

   Turn off the tractor and cycle the hydraulic controls to relieve all pressure from the system before wrenching.

2. 2

   Access the Valve Block

   Locate the auxiliary remote valve stack at the rear of the tractor. Identify Valve #4 (usually the fourth slice in the stack).

3. 3

   Disconnect Electronics

   Carefully unplug the electrical harness from the Valve 4 solenoid.

4. 4

   Remove the Valve Slice

   Unbolt the tie-rods holding the hydraulic valve stack together and carefully extract the Valve 4 distributor section.

5. 5

   Reseal or Replace

   If leaking/sticking: Use a specialized spool valve reseal kit to replace the internal O-rings and seals, and clean out any debris. If the solenoid/electronics have failed: Replace the entire distributor section with a new OEM unit.

6. 6

   Reassembly

   Reinstall the valve slice, torque the stack tie-rods to OEM spec, and reconnect the electrical harness.

7. 7

   System Bleed and Test

   Top up the hydraulic fluid, start the tractor, and operate the #4 remote to bleed air from the system. Clear the DTC using a compatible diagnostic tool and verify the code does not return.