Massey Ferguson 0A.73.12: External Hydraulic Valve 7 Issue

Malfunction within the circuit or mechanical operation of the 7th external hydraulic remote valve (spool valve). This indicates a likely electrical continuity issue, a short/open circuit at the valve's solenoid, or a failure of the valve to respond to command signals.

• 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

   Identify the Valve: Locate External Hydraulic Valve 7 on the rear remote valve stack.

2. 2

   Visual Inspection: Check the wiring harness leading to Valve 7 for chafing, breaks, or pinched wires.

3. 3

   Connector Check: Disconnect the electrical plug at the valve. Inspect for bent pins, moisture, dirt, or corrosion, which are common causes for 'connection problem' faults on these valves.

4. 4

   Electrical Testing: Use a multimeter to test the resistance of the valve's solenoid to ensure it is not shorted or open. Check for proper voltage reaching the connector when the valve is commanded from the cab.

1. 1

   Relieve Pressure

   Ensure the tractor is turned off and relieve all hydraulic pressure from the system by cycling the hydraulic controls.

2. 2

   Clean the Area

   Thoroughly clean the area around the external hydraulic valve stack to prevent dirt from entering the hydraulic system.

3. 3

   Repair Wiring

   If the diagnostic checks revealed a damaged connector or wire, splice in a new connector pigtail or repair the harness.

4. 4

   Replace the Valve/Solenoid

   If the wiring is sound but the valve solenoid failed the multimeter test, disconnect the hydraulic lines and remove the mounting bolts for Valve 7.

5. 5

   Install New Part

   Mount the replacement hydraulic electric spool valve, ensuring all O-rings and seals are properly seated. Torque bolts to OEM specifications.

6. 6

   Reconnect and Bleed

   Reconnect the electrical harness and hydraulic lines. Start the tractor, operate the valve to bleed any trapped air, and check for leaks.

7. 7

   Clear Codes

   Use a compatible Massey Ferguson diagnostic tool/interface to clear the 0A.73.12 DTC from the system.