Massey Ferguson 0A.30.28: External Hydraulic Valve 3 Issue

This indicates a malfunction in the third external hydraulic remote (spool valve), which could be caused by an electrical connection problem, a voltage irregularity to the valve's solenoid, or a mechanical failure within the valve itself.

• 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

   Connect a compatible diagnostic tool to the tractor to confirm the presence of code 0A.30.28 and check for any related voltage or connection codes

2. 2

   Inspect the wiring harness and electrical connector leading to the 3rd external hydraulic spool valve at the rear of the tractor for frayed wires, corrosion, or loose connections

3. 3

   Verify that the correct voltage is reaching the valve's solenoid when the 3rd remote is activated from the cab

4. 4

   Check the valve block and quick couplers (e.g., 1/2" ISO 5675 couplers) for physical leaks, back pressure issues, or mechanical binding

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to ensure safety while working on the electrical connections.

2. 2

   Clean the Area

   Thoroughly clean the area around the rear remote valves to prevent dirt from entering the hydraulic system during disassembly.

3. 3

   Address Wiring

   If the diagnostic checks revealed a damaged connector or wiring fault, repair or replace the pigtail connector leading to Valve 3.

4. 4

   Remove the Valve

   If the electrical circuit is sound but the valve is unresponsive or leaking, unbolt the 3rd spool valve from the lift cover/valve block assembly.

5. 5

   Rebuild or Replace

   To Rebuild: Use an OEM spool valve repair kit to replace the internal O-rings and seals. To Replace: Install a new 3rd spool valve assembly if the internal bore is scored or the solenoid has completely failed.

6. 6

   Reassembly

   Bolt the valve back into place, reconnect the hydraulic lines and electrical harness, and top off the tractor's hydraulic fluid.

7. 7

   Test

   Reconnect the battery, start the tractor, and operate the 3rd hydraulic remote to ensure proper flow and pressure. Clear the DTC using the diagnostic tool.