Massey Ferguson 14.01.03 – TRANS1: High Pressure Brake System Pressure Too High DYNA 6 (TRANS1)

The electronic control system has detected that the hydraulic or pneumatic pressure within the high-pressure braking circuit has exceeded the maximum safe operating threshold.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5700 S Series
• 5709 S
• 5710 S
• 5711 S
• 5712 S
• 5713 S
• 5700 SL Series
• 6400 Series
• 6480
• 6600 Series
• 6700 Series
• 6700 S Series
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 7600 Series
• 7614
• 7615
• 7618
• 7700 Series
• 7700 S Series
• 7715 S
• 7716 S
• 7718 S
• 7720 S
• 7726 S
• 8400 Series
• 8600 Series
• 8700 Series

1. 1

   Check for associated electrical codes such as 14.00.0A (Brake Pressure Sensor High Volts) or 14.01.07 (Brake Pressure Sensor Open Circuit), which point to a wiring or sensor failure.

2. 2

   Connect a mechanical pressure gauge to the brake system test port to verify the actual hydraulic/pneumatic pressure; if normal, the sensor is likely faulty.

3. 3

   Inspect the brake pressure sensor, wiring harness, and connector for corrosion, damage, or a short-to-voltage condition.

4. 4

   If the mechanical pressure is genuinely too high, inspect the brake pressure regulating valve and hydraulic return lines for blockages or sticking spools.

1. 1

   Depressurize the System

   Turn off the tractor and safely relieve all hydraulic and pneumatic pressure from the brake system by pumping the brake pedals until they feel firm/depressurized.

2. 2

   Replace the Sensor (If Faulty)

   Disconnect the electrical harness from the brake pressure sensor. Unthread the old sensor from the master cylinder or air supply line. Ensure the port is clean and free of debris. Thread in the new sensor and tighten to OEM torque specifications. Reconnect the electrical harness.

3. 3

   Address Mechanical Overpressure (If Applicable)

   If the sensor was reading correctly and the pressure was actually too high, replace or rebuild the faulty brake pressure regulating valve.

4. 4

   Bleed the Brakes

   If hydraulic lines were opened, bleed the brake system. Run the engine at idle (around 1200 RPM) and bleed the nipples on top of the rear axle trumpets one side at a time, as well as the trailer brake unit.

5. 5

   Clear Codes and Test

   Clear the TRANS1 fault codes using a diagnostic tool. Start the tractor, test the brake function at low speeds, and verify that the 14.01.03 code does not return.