Massey Ferguson 0A.23.22 – Transmission/Hydraulic Control Unit or Mid Mount Valve Module / EHR module: External Hydraulic Valve 2 Issue

Malfunction in the second electronic hydraulic remote (EHR) valve circuit. The underlying condition is typically an electrical connection problem on the hydraulic valve, a faulty spool position sensor value, or a mechanical sticking of the spool valve that prevents it from responding correctly to the control module's 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 hydraulic oil for contamination (dirt or metal shavings) and check for a blocked hydraulic or transmission filter

2. 2

   Check the hydraulic couplers and hoses on Valve 2 for physical damage, blockages, or restrictions

3. 3

   Inspect the wiring harness and electrical connector at External Hydraulic Valve 2 for corrosion, loose pins, or broken wires

4. 4

   Test the spool position sensor and the solenoid coil on Valve 2 for proper resistance and voltage to determine if the issue is electrical (failed solenoid/sensor) or mechanical (stuck spool)

1. 1

   Safety & Prep

   Lower all implements to the ground. Turn off the engine and cycle the remote levers/buttons to relieve all hydraulic pressure in the system.

2. 2

   Locate the Valve

   Access the external hydraulic valve block (usually located at the rear of the tractor above the rear axle). Identify the section corresponding to Valve 2.

3. 3

   Disconnect Electricals

   Unplug the electrical connectors from the solenoid coil and the spool position sensor on Valve 2.

4. 4

   Remove the Valve/Solenoid

   If replacing the solenoid/sensor: Unbolt the faulty solenoid coil or sensor from the valve body. If replacing the entire valve section: Disconnect the hydraulic lines attached to Valve 2. Unbolt the tie-rods holding the valve stack together and carefully remove the Valve 2 section.

5. 5

   Installation

   Install the new valve section, solenoid, or sensor. Ensure all O-rings are seated correctly. Torque all bolts to OEM specifications.

6. 6

   Reassembly

   Reconnect the hydraulic lines and plug in the electrical connectors.

7. 7

   Testing & Clearing

   Top up the hydraulic fluid if any was lost. Start the tractor and operate the remote to bleed air from the system. Check for leaks. Finally, use a compatible diagnostic tool to clear the 0A.23.22 DTC from the system.