Massey Ferguson A.6X.1A – ACM (Auxiliary Control Module / Armrest Control Module): External Hydraulic Valve 6 Issue

Malfunction, communication failure, or mechanical fault with the 6th external hydraulic remote valve (spool valve) on the tractor's hydraulic block.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 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 electrical harness and CAN bus connectors at External Valve 6 for corrosion, bent pins, or wire chafing (wiring is a primary culprit, especially if code 0A.41.FF is also present).

2. 2

   Verify that the transmission system is generating adequate base hydraulic pressure to move the valve spool.

3. 3

   Verify the flow percentage and timer settings for Valve 6 in the tractor's color display or instrument cluster to ensure it hasn't been electronically locked out or misconfigured.

4. 4

   Inspect the spool valve for physical damage, leaks, or debris that might be causing mechanical binding and preventing the spool from stroking properly.

1. 1

   Relieve Pressure

   Lower all implements to the ground, turn off the engine, and cycle the hydraulic controls to relieve all trapped pressure in the system.

2. 2

   Disconnect Electricals

   Disconnect the CAN bus/electrical harness connector from External Hydraulic Valve 6.

3. 3

   Remove Hydraulic Lines

   Mark and disconnect the hydraulic hoses/fittings from the rear of the valve. Cap all lines immediately to prevent system contamination.

4. 4

   Dismount the Valve

   Unbolt the Valve 6 assembly from the main hydraulic block/stack.

5. 5

   Replace or Rebuild

   Depending on the diagnosis, either install a new spool valve assembly or rebuild the existing valve using an OEM seal/O-ring kit.

6. 6

   Reinstallation

   Mount the new/rebuilt valve to the hydraulic block. Reconnect the hydraulic lines (ensuring proper torque on the fittings) and plug in the electrical harness.

7. 7

   Test and Clear Codes

   Top off the hydraulic/transmission fluid if any was lost. Start the tractor, test the remote for proper operation (checking for leaks), and use a compatible diagnostic tool to clear the 0A.6X.1A DTC from the system.