Massey Ferguson 0A.41.18: External Hydraulic Valve 4 Issue

Malfunction in the circuit or mechanical operation of the 4th rear remote spool valve. The issue can stem from restricted oil flow, a physically stuck valve, pressure-related faults, or an electrical connection failure to the valve's electronic actuator.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Inspect the hydraulic/transmission oil filter for blockages and check the UTTO hydraulic fluid for contamination (dirt or metal shavings).

2. 2

   Check the wiring harness and connector going to the #4 electric spool valve for corrosion, damage, or loose connections.

3. 3

   Check the rear remote couplers for damage or blockages, and inspect hoses for wear or leaks.

4. 4

   Test the pilot pressure control for the electronic spool valve to ensure it is receiving the correct signal to open/close.

1. 1

   Relieve Pressure

   Turn off the tractor and relieve all hydraulic system pressure before beginning any work.

2. 2

   Address Fluid/Filters

   If the hydraulic fluid is contaminated or past its 300–500 hour service interval, drain the fluid and replace the hydraulic filters.

3. 3

   Electrical Repair

   If the diagnostic checks revealed a wiring issue at the #4 valve, clean the contacts or repair the damaged harness section.

4. 4

   Valve Rebuild/Replacement

   If the valve is mechanically sticking or leaking, remove the spool valve assembly. You can attempt to rebuild the valve using an OEM repair kit to replace internal seals and worn components. If the electronic actuator (slice head) has failed, the entire Electric Spool Slice must be replaced.

5. 5

   Programming

   If a new Electric Spool Slice is installed, it must be programmed to the tractor's computer to function correctly.

6. 6

   Testing

   Refill the system with clean UTTO fluid, perform seasonal warm-up steps, and test the #4 remote valve for proper operation and leaks.