Massey Ferguson A.41.19: External Hydraulic Valve 4 Issue

A malfunction or connection problem on the tractor's fourth external auxiliary hydraulic remote valve, indicating electrical connection problems, pressure loss, or mechanical failure within the specified hydraulic valve.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 6200 Series
• 6400 Series
• 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 the UTTO hydraulic fluid level and condition. If the fluid is dark, smells burnt, or looks milky (water contamination), it must be flushed.

2. 2

   Inspect the wiring harness and electrical solenoid connectors going directly to External Valve 4 for corrosion, broken wires, or loose fittings.

3. 3

   Use a hydraulic gauge to test the system pressure at the remote couplers to determine if the issue is isolated to Valve 4 or if there is a broader pump/restriction issue.

4. 4

   Inspect the valve block, O-rings, hoses, and quick couplers for external leaks.

5. 5

   Ensure the hydraulic filter is not partially blocked, which can restrict flow to the valve block.

1. 1

   Relieve Pressure

   Turn off the tractor and actuate the hydraulic levers/joysticks to relieve all residual hydraulic pressure in the system before wrenching.

2. 2

   Disconnect Valve 4

   Locate the external hydraulic valve block at the rear of the tractor. Disconnect the electrical harness connected to Valve 4.

3. 3

   Remove the Valve

   Disconnect the hydraulic lines and unbolt the specific spool valve section from the manifold block.

4. 4

   Inspect and Clean

   Check the valve for sticking spools or blown internal O-rings. If the valve is a Bosch Rexroth SB23, the electronic unit on the valve is highly prone to failure.

5. 5

   Repair or Replace

   Due to the complexity and high failure rate of the OEM electronic spool valves, replace the valve section entirely or send it to a hydraulic specialist for an electrical joystick conversion/rebuild.

6. 6

   Reassembly

   Install the new or repaired valve with fresh O-rings. Reconnect the hydraulic lines and electrical harness.

7. 7

   Fluid and Filter

   Change the hydraulic filter and top off the system with clean UTTO fluid.

8. 8

   Test

   Start the tractor, allow the fluid to warm up, and test the remote valve with an implement to ensure the code clears and pressure holds.