Massey Ferguson A.41.22 – Onboard diagnostic system: External Hydraulic Valve 4 Issue

Indicates a fault, pressure loss, or electrical connection problem specifically isolated to the number 4 external hydraulic remote/spool valve.

• 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 UTTO hydraulic fluid level and condition (look for dark, burnt, or milky fluid indicating water contamination)

2. 2

   Inspect the wiring harness and electrical connector going to External Hydraulic Valve 4 for corroded, loose, or damaged pins

3. 3

   Check for a partially blocked hydraulic filter restricting flow to the system

4. 4

   Inspect the valve block for external leaks such as seeping O-rings or couplers

5. 5

   Perform a leak down and pressure test at the remote with a hydraulic gauge to determine if the valve is failing to hold correct pressure internally

1. 1

   Relieve Pressure

   Ensure the tractor engine is off, the implement is lowered to the ground, and all hydraulic pressure is relieved from the system before servicing.

2. 2

   Fluid & Filter Service

   If the diagnostic check revealed degraded fluid, drain the hydraulic fluid, replace the hydraulic filter, and refill with clean UTTO fluid.

3. 3

   Harness Repair

   If the electrical connector to Valve 4 is damaged, clean the contacts with electrical contact cleaner or splice in a replacement pigtail connector.

4. 4

   Valve / Solenoid Replacement

   If the valve solenoid has failed internally, unbolt the faulty electric spool slice or solenoid from the hydraulic valve stack. Install the replacement spool valve/solenoid, ensuring all mating O-rings are seated correctly to prevent internal pressure loss.

5. 5

   Programming

   Note that some complete electric spool slice replacements (like part 3797234M6) may need to be programmed to the tractor's ECU upon installation.

6. 6

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool to clear the A.41.22 / 0A.41.22 code from the system.

7. 7

   Test

   Run the tractor and perform a functional test of the remote to ensure it reaches full pressure without sluggishness.