Massey Ferguson 0A.80.24 – Hydraulic/Implement Control Module or Vehicle Control Module (VCM): External Hydraulic Valve 8 Issue

The tractor's onboard diagnostic system has detected a malfunction in the circuit or operation of the 8th external hydraulic remote valve (spool valve), typically caused by an electrical fault or mechanical failure.

• 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 electrical connector going to the 8th external hydraulic valve slice for corrosion, bent pins, moisture ingress, or wire chafing.

2. 2

   Perform a swap test by swapping the electrical connector (or the solenoid, if removable) with a known-good adjacent valve (e.g., Valve 7). If the fault code changes to indicate an issue with Valve 7, the valve/solenoid is faulty. If the code remains 0A.80.24, the issue is in the wiring harness or the control module.

3. 3

   Use a multimeter to test the resistance of the solenoid coil on Valve 8 to ensure it is not shorted or open.

4. 4

   Inspect the valve block for any physical damage or hydraulic fluid leaks that could indicate a blown seal causing a loss of pressure.

1. 1

   Safety First

   Park the tractor on a level surface, lower all implements to the ground, and turn off the engine. Relieve all hydraulic pressure by cycling the hydraulic control levers/buttons in the cab.

2. 2

   Access the Valve Block

   Locate the rear external hydraulic valve stack at the rear of the tractor.

3. 3

   Disconnect Electricals

   Unplug the electrical wiring harness connector from the faulty Valve 8 slice.

4. 4

   Remove the Valve Slice

   If the entire electric spool slice needs replacement, remove the tie-bolts holding the spool valve stack together. Carefully separate the stack and slide out the faulty valve slice. (Note: Have a catch pan ready, as residual hydraulic fluid will leak out).

5. 5

   Install the New Part

   Install the new spool slice or replacement solenoid. Crucial: Ensure all O-rings and seals between the valve slices are properly seated to prevent internal and external leaks.

6. 6

   Reassembly

   Reinsert and tighten the valve stack tie-bolts to the manufacturer's specified torque. Reconnect the electrical harness.

7. 7

   Testing and Clearing

   Top up the hydraulic fluid reservoir if necessary. Start the tractor, use a compatible Massey Ferguson diagnostic tool to clear the 0A.80.24 fault code, and test the operation of the 8th remote valve to ensure the issue is resolved. (Note: Some modern electric spool slices require programming/calibration to the tractor upon installation).