Massey Ferguson 14.02.04 – TRANS1: High Pressure Brake System Pressure DYNA 6 (TRANS1)

This code indicates an anomaly in the high-pressure braking circuit on tractors equipped with the Dyna-6 transmission. The system is detecting an irregular pressure reading (which could be an actual hydraulic pressure issue or a false reading from a faulty sensor).

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5709 S
• 5710 S
• 5711 S
• 5712 S
• 5713 S
• 6465
• 6475
• 6480
• 6485
• 6490
• 6495
• 6497
• 6499
• 6614
• 6615
• 6616
• 6713 S
• 6714 S
• 6715 S
• 6716 S
• 6718 S
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714 S
• 7715 S
• 7716 S
• 7718 S
• 7719 S
• 7720 S
• 7722 S
• 7724 S
• 7726 S
• 8660
• 8670
• 8680
• 8690

1. 1

   Inspect the wiring harness and connector going to the brake pressure sensor (handbrake/trailer brake pressure sensor) for chafing, corrosion, or an open circuit.

2. 2

   Verify actual hydraulic pressure in the high-pressure brake system using a mechanical pressure gauge at the transmission pressure connector to rule out a false sensor signal.

3. 3

   Check for air trapped in the assisted brake master cylinders, which can cause spongy brakes or erratic pressure readings.

1. 1

   Preparation

   Park the tractor on a level surface, engage the park brake, turn off the engine, and relieve any residual hydraulic pressure.

2. 2

   Locate the Sensor

   Locate the high-pressure brake sensor on the transmission/brake valve block.

3. 3

   Replace the Sensor

   If diagnostics point to a failed sensor, disconnect the electrical harness. Unscrew the faulty sensor and install the new OEM replacement part.

4. 4

   Bleed the System

   Locate the bleed screws on the assisted brake master cylinders. Attach a bleed hose and follow the standard bleeding procedure to purge all air from the high-pressure braking system.

5. 5

   Clear Codes

   Turn the ignition on and use a diagnostic tool to clear the 14.02.04 fault code from the TRANS1 module.

6. 6

   Test

   Start the tractor, allow hydraulic pressure to build, and test the brakes to ensure the code does not return.