Massey Ferguson 13.03.19 – TRANS1: Brake System Pressure Too High Dyna VT

The system has detected that the hydraulic or pneumatic pressure within the brake system (often the handbrake/ParkLock or trailer brake circuit) has exceeded the maximum allowable threshold. This is typically caused by a faulty brake pressure sensor sending an incorrect high-voltage signal, a short circuit in the sensor wiring, or a physical blockage/valve failure in the transmission's brake circuit.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 6614
• 6615
• 6616
• 6712 S
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7714 S
• 7715 S
• 7716 S
• 7718 S
• 7719 S
• 7720 S
• 7722 S
• 7724 S
• 7726 S
• 8660
• 8670
• 8680
• 8690
• 8727 S
• 8730 S
• 8732 S
• 8735 S
• 8737 S

1. 1

   Check transmission/hydraulic oil level to ensure it is correct, as low or degraded oil can cause erratic pressure readings and valve sticking.

2. 2

   Inspect the condition of the air/hydraulic connection couplers with the implement braking system if hooked up to an implement.

3. 3

   Inspect the wiring harness leading to the handbrake/trailer brake pressure sensor for chafed wires, corrosion in the connector, or a short-to-ground/short-to-power.

4. 4

   Test the signal voltage from the brake pressure sensor to the TRANS1 module using a multimeter to determine if the sensor is stuck in a high-reading state.

1. 1

   Depressurize the System

   Ensure the tractor is parked on level ground, the engine is off, and the wheels are chocked. Pump the brake pedals to relieve any residual hydraulic/pneumatic pressure in the system.

2. 2

   Locate the Sensor

   Locate the Handbrake / Trailer Brake Pressure Sensor on the transmission valve block (usually located on the right-hand side of the transmission housing or near the trailer brake output valves).

3. 3

   Disconnect Electronics

   Carefully unplug the electrical connector from the pressure sensor.

4. 4

   Remove the Sensor

   Using a properly sized wrench or deep socket, unthread the faulty pressure sensor. Have a rag ready, as a small amount of hydraulic fluid may leak.

5. 5

   Install the New Sensor

   Thread the new OEM pressure sensor into the port. Tighten to the manufacturer's specified torque (do not overtighten, as this can damage the sensor diaphragm).

6. 6

   Reconnect and Top Up

   Reconnect the electrical harness. Check the transmission fluid level and top up if any significant amount was lost during the swap.

7. 7

   Clear Codes

   Turn the ignition on and use a diagnostic tool to clear the 13.03.19 fault code from the TRANS1 module. Test the brakes and ParkLock system to ensure the code does not return.