Massey Ferguson 13.03.08 – TRANS1: Air Brake Solenoid Issue Dyna VT / Dyna 6 (TRANS1)

Electrical malfunction—such as an open circuit, short to ground, or abnormal current draw—within the circuit that controls the air brake solenoid valve on tractors equipped with Dyna 6 or Dyna VT transmissions.

• 7724S
• 5712SL
• 7722S
• 7722
• 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 Air Brake Solenoid (often designated as component Y40 on Massey Ferguson electrical schematics, frame 32 / A.30.A)

2. 2

   Inspect the wiring harness between the TRANS1 module and the Y40 solenoid for chafing, breaks, or melted insulation

3. 3

   Disconnect the solenoid and check the pins for corrosion, moisture ingress, or pushed-out terminals

4. 4

   Test the solenoid coil for resistance using a multimeter to verify it is not internally shorted or open

5. 5

   Check the harness side for continuity back to the TRANS1 module and ensure there is no short to ground or short to power

1. 1

   Power Down

   Turn off the tractor and disconnect the battery ground to prevent electrical spikes.

2. 2

   Access the Valve

   Locate the air brake valve block assembly (typically mounted near the rear axle/trailer brake couplings).

3. 3

   Remove the Solenoid

   Disconnect the electrical connector from the faulty air brake solenoid. Remove the retaining nut or screws holding the solenoid coil to the valve stem.

4. 4

   Install the New Part

   Slide the new OEM solenoid coil over the valve stem and secure it.

5. 5

   Reconnect and Reassemble

   Plug the electrical connector back in, ensuring the weather seal is intact.

6. 6

   Clear Codes

   Reconnect the battery, turn the ignition on, and use a diagnostic tool to clear the 13.03.08 fault code from the TRANS1 module.

7. 7

   Test

   Start the tractor and actuate the brakes/trailer brakes to ensure the air brake solenoid functions correctly and the code does not return.