Massey Ferguson A.21.22 – Hydraulic Valve Module: External Hydraulic Valve 2 Issue
Issue description
Indicates a fault within the second external hydraulic remote valve (spool valve) circuit. This is typically caused by a connection problem on the hydraulic valve, a loss of communication with the valve module, or an issue with the spool position sensor value.
Applies to these machines
40 machines- 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
Check the cause
Use a compatible Massey Ferguson diagnostic tool to confirm code 0A.21.22 and check for related codes (such as 0A.41.FF, indicating a connection problem).
Inspect the wiring harness leading to External Hydraulic Valve 2 for damaged wires, corrosion, or loose pins at the connector.
Verify the spool position sensor values using the diagnostic interface to see if the sensor is reading out of range or is unresponsive.
Ensure there is proper communication between the Dash and the Hydraulic Valve Module.
Repair steps
Locate Valve 2
Identify External Hydraulic Valve 2 on the rear remote stack or mid-mount valve block.
Clean and Reconnect
Disconnect the electrical harness to the valve. Clean the contacts with electrical contact cleaner, check for bent pins, and securely reconnect the harness.
Test Operation
Clear the DTCs using your diagnostic tool and test the hydraulic remote. If the code does not return, the issue was a poor connection.
Replace Components
If the code persists and the wiring harness tests good for continuity, the fault lies within the valve's electronics. Replace the faulty Spool Position Sensor or the complete External Hydraulic Valve 2 assembly.
Recalibrate
After replacing the valve or sensor, use the diagnostic tool to clear the codes and recalibrate the hydraulic valve limits if required by the system.
Parts you might need
(2)External Hydraulic Valve Assembly (Spool Valve)
Cross-reference the tractor's specific serial number with a Massey Ferguson parts catalog to get the exact electronic spool valve part number.
Spool Position Sensor
Get help to fix this fault by requesting a quote
