Massey Ferguson 0A.20.23 – Mid Mount Valve Module / EHR control: External Hydraulic Valve 2 Issue

Malfunction in the second external hydraulic remote valve circuit, typically caused by a connection problem on the hydraulic valve, a lack of communication with the valve module, or an issue with the spool position sensor value reading out of range.

• 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
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Use a compatible Massey Ferguson diagnostic tool to confirm 0A.20.23 is the active code and check for any secondary codes related to the spool position sensor.

2. 2

   Verify communication between the dash/main ECU and the Mid Mount Valve Module, as communication drops can trigger valve errors.

3. 3

   Inspect the wiring harness and electrical connectors leading to External Hydraulic Valve 2. Look for corrosion, bent pins, or damaged wires that could cause a connection problem.

4. 4

   Monitor the spool position sensor value via the diagnostic tool to see if it is erratic, stuck, or reading out of the expected voltage range.

1. 1

   Power Down

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

2. 2

   Locate the Valve

   Locate External Hydraulic Valve 2 on the rear remote valve stack or mid-mount block.

3. 3

   Clean and Reconnect

   Disconnect the electrical plug to the valve's actuator and spool position sensor. Clean the contacts with electrical contact cleaner, apply dielectric grease, and securely reconnect them.

4. 4

   Replace Faulty Components

   If the wiring is sound but the spool position sensor value remains faulty, the sensor or the entire external hydraulic valve section must be replaced.

5. 5

   Reassembly and Bleeding

   Install the new valve or sensor, ensuring all hydraulic lines are torqued to spec.

6. 6

   Clear Codes

   Reconnect the battery, turn on the tractor, and use the diagnostic tool to clear the 0A.20.23 code. Test the operation of the #2 hydraulic remote to ensure the fault does not return.