Massey Ferguson A.11.26 – Mid Mount Valve Module / Dash: External Hydraulic Valve 1 Issue
Issue description
Indicates a fault or malfunction specifically within the first external hydraulic remote valve circuit. Often tied to an issue with the spool position sensor value or valve calibration.
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
Retrieve and Verify Codes: Use a compatible Massey Ferguson diagnostic tool or interface device to confirm if 0A.11.26 is active or stored.
Check Spool Position Sensor: Verify the spool position sensor value, as sensor failure is a primary trigger for external hydraulic valve issues.
Check Module Communication: Inspect the wiring harness and CAN bus communication between the Dash and the Mid Mount Valve Module for breaks or corrosion.
Valve Calibration: Attempt a software calibration of the hydraulic valves, as calibration loss can trigger valve issue codes.
Repair steps
Connect the diagnostic interface to the tractor to read the live data from External Hydraulic Valve 1.
Connect the diagnostic interface to the tractor to read the live data from External Hydraulic Valve 1.
Inspect the physical wiring harness connecting the Mid Mount Valve Module to the Dash. Repair any damaged pins or wires.
Inspect the physical wiring harness connecting the Mid Mount Valve Module to the Dash. Repair any damaged pins or wires.
If the spool position sensor value is out of range and wiring is intact, remove and replace the spool position sensor or the entire external hydraulic valve assembly.
If the spool position sensor value is out of range and wiring is intact, remove and replace the spool position sensor or the entire external hydraulic valve assembly.
After replacing the valve or sensor, use the diagnostic tool to perform the "Calibration OF Valves" procedure to teach the system the new spool travel limits.
After replacing the valve or sensor, use the diagnostic tool to perform the "Calibration OF Valves" procedure to teach the system the new spool travel limits.
Clear the DTCs from the system and test the hydraulic remote operation.
Clear the DTCs from the system and test the hydraulic remote operation.
Parts you might need
(3)External Hydraulic Valve Single Spool
1026699M92External hydraulic valve kit (single spool, double-acting control valve)
TS3200MAftermarket Kit (TISCO). Manual conversion kit often used for older models, but heavily referenced in parts catalogs for MF external valve replacements.
Spool Position Sensor
Generic part name; specific OEM part number not provided in the search results, but it is the primary electronic component monitored by this code.
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