Massey Ferguson 0A.33.12: External Hydraulic Valve 3 Issue

Malfunction, communication failure, or electrical fault (such as a connection problem or solenoid failure) on the third rear remote/spool valve of the tractor's hydraulic system.

• 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 wiring harness and the electrical connector at External Valve 3 for corrosion, bent pins, or wire chafing

2. 2

   Check the hydraulic fluid to ensure it is at the correct level and free of contaminants that could jam the spool valve

3. 3

   Test the solenoid on Valve 3 for proper resistance and ensure it is receiving voltage from the tractor's harness when actuated from the cab

4. 4

   Use a compatible diagnostic tool to retrieve the code, clear it, and see if it returns upon actuating the #3 remote lever/button

1. 1

   Depressurize the System

   Turn off the tractor, lower all implements to the ground, and cycle the hydraulic levers/buttons to relieve any residual hydraulic pressure.

2. 2

   Disconnect Power

   Disconnect the negative battery cable to prevent electrical shorts while working on the valve solenoids.

3. 3

   Access the Valve Stack

   Locate the external hydraulic valve block (typically at the rear of the tractor, mounted directly on or near the lift cover). Identify Valve 3 in the stack.

4. 4

   Remove the Valve

   Disconnect the electrical connector to the valve's solenoid. Remove the securing bolts holding the valve to the base plate or adjacent spool sections.

5. 5

   Rebuild or Replace

   If rebuilding: Separate the valve sections, remove the old O-rings/seals, clean the spool, and install an OEM repair kit. If replacing: Mount the new 3rd spool valve assembly.

6. 6

   Reassembly

   Bolt the valve back into the stack, ensuring O-rings are properly seated between the sections. Torque the bolts to the manufacturer's specification.

7. 7

   Test

   Reconnect the battery, start the tractor, check for hydraulic leaks, and test the operation of the 3rd remote. Clear the 0A.33.12 code using a diagnostic tool.