Massey Ferguson A.73.1E – Remote (Aux) Controller / Armrest Controller: External Hydraulic Valve 7 Issue

A malfunction in the electro-hydraulic remote (EHR) valve number 7 (spool valve), typically caused by an electrical fault, a communication failure on the CAN bus, or a mechanical failure within the valve's internal solenoid/microprocessor.

• 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

1. 1

   Verify the hydraulic fluid level and ensure the hydraulic filter is not clogged.

2. 2

   Inspect the wiring harness and connectors at the rear remote stack for Valve 7 for damaged pins, corrosion, or chafed wires causing a short to ground.

3. 3

   Check the lever potentiometer in the armrest controller.

4. 4

   Use a compatible diagnostic tool to read live measure values (voltage) and perform a Component Actuation test to see if the valve solenoid responds mechanically.

1. 1

   Depressurize the System

   Turn off the tractor and actuate the hydraulic levers to relieve all system pressure before working on the remote valves.

2. 2

   Disconnect Electricals

   Disconnect the CAN bus/electrical connector from EHR Valve 7.

3. 3

   Remove the Valve

   Unbolt the tie-rods/mounting bolts securing the valve stack. Carefully slide out Valve 7.

4. 4

   Install the New Valve

   Insert the replacement valve slice, ensuring all O-rings between the valve slices are seated correctly to prevent internal leaks. Torque the stack bolts to OEM specifications.

5. 5

   EHR Valve Renumbering

   Use a diagnostic tool to perform an Electro-Hydraulic Remote Valve Renumbering Procedure and an Electro-Hydraulic Remote Valve Lever Calibration so the system recognizes the new slice as Valve 7.

6. 6

   Clear Codes

   Clear the 0A.73.1E fault code from the ECU memory and test the implement under load.