Massey Ferguson 14.X.06 – TRANS1: High Pressure Brake System Charging Too Often DYNA 6 (TRANS1)

The high-pressure brake accumulator is inflating/charging too frequently, indicating that the system is rapidly losing its stored pressure. This is typically caused by a ruptured diaphragm inside the brake accumulator, a hydraulic leak in the brake circuit, or a faulty brake pressure 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
• 5709SL
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 6465
• 6475
• 6480
• 6614
• 6615
• 6616
• 6712S to 6718S
• 7465 to 7499
• 7614 to 7626
• 7714 to 7726

1. 1

   Inspect the entire high-pressure hydraulic brake circuit (valves, pipes, and fittings) for external fluid leaks

2. 2

   Test the nitrogen preload pressure of the brake accumulator (typically pre-charged to 9 Bar) to check for a ruptured diaphragm or lost charge

3. 3

   Check the brake pressure sensor (B233 or X495) and its wiring harness to ensure it is not sending erratic low-pressure signals to the TRANS1 module

1. 1

   Depressurize the System

   Turn off the tractor and pump the brake pedals repeatedly until all hydraulic pressure is relieved from the accumulator circuit.

2. 2

   Replace the Accumulator (if faulty)

   Locate the brake accumulator (a metal sphere/canister, usually near the transmission or brake valve block). Unthread the old accumulator and install the new OEM replacement.

3. 3

   Replace the Pressure Sensor (if faulty)

   If diagnostics point to the sensor, disconnect the electrical harness, unthread the sensor from the valve block, and install the new sensor.

4. 4

   Bleed the Brakes

   Because the hydraulic circuit was opened, you must bleed the brake system to remove any trapped air.

5. 5

   Clear Codes

   Use a diagnostic tool to clear the 14.X.06 fault code from the TRANS1 module and test-drive the tractor to ensure the pump cycles normally.