Massey Ferguson A.62.26 – EHR (Electronic Hydraulic Remote) control module or main Tractor Control Unit (TCU): External Hydraulic Valve 6 Issue

The diagnostic system has detected a malfunction in the 6th electronic hydraulic remote (spool) valve, typically caused by an electrical connection problem, a failure of the valve's internal solenoid/actuator, or a mechanical restriction preventing the valve from responding to commands.

• 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

   Check hydraulic fluid (UTTO) level and condition, and inspect for a blocked hydraulic/transmission filter (primary cause of spool valve restrictions).

2. 2

   Disconnect the wiring harness at External Valve 6 and inspect for corrosion, bent pins, or moisture. Test harness for continuity back to the EHR module.

3. 3

   Inspect the valve block, quick couplers, and hoses for external leaks or physical damage.

4. 4

   Perform a swap test by temporarily swapping the electrical connector from Valve 6 to an adjacent working valve (e.g., Valve 5) to determine if the fault follows the wiring or stays with the valve block.

1. 1

   Relieve Pressure

   Lower all implements to the ground. Turn off the engine and cycle the hydraulic controls to relieve any residual pressure in the system.

2. 2

   Clean the Area

   Thoroughly clean the rear remote valve stack to prevent dirt from entering the hydraulic system during disassembly.

3. 3

   Disconnect

   Unplug the electrical harness connector from Valve 6. Disconnect the hydraulic lines/hoses attached to the valve.

4. 4

   Remove the Valve

   Unbolt the faulty spool valve section from the hydraulic valve stack (note that on some models, this requires loosening tie-rods that hold the valve slices together).

5. 5

   Install the New Valve

   Replace the O-rings/seals between the valve slices. Install the new Valve 6 and torque the mounting bolts to OEM specifications.

6. 6

   Reassemble

   Reconnect the hydraulic lines and the electrical harness.

7. 7

   Fluid and Calibration

   Top up the hydraulic fluid with OEM UTTO fluid. Start the tractor, check for leaks, and use a compatible diagnostic tool (or the tractor's Datatronic terminal) to clear the DTC and perform a valve calibration so the ECU learns the new valve's limits.