CLAAS 7621h – Claas Tr2 A57 2 Transmission Module: Low High-Pressure Brake Pressure Detected

The high-pressure brake pressure is below 70 bar for less than 2 seconds during operation. This triggers an audio warning and a steady brake indicator light. The issue may be related to the hydraulic circuit, braking pressure sensor, high pressure braking solenoid valve, or voltage delivered by the transformer.

1. 1

   The hydraulic circuit (valve, pipes, switch)

2. 2

   Braking pressure sensor (B233)

3. 3

   High pressure braking solenoid valve (Y329)

4. 4

   Voltage delivered by the transformer (V24)

1. 1

   Inspect the hydraulic circuit

   Check for leaks, blockages, or damage in the valve, pipes, and switch.

2. 2

   Test the braking pressure sensor

   Verify the functionality of the braking pressure sensor (B233).

3. 3

   Inspect the high pressure braking solenoid valve

   Check the high pressure braking solenoid valve (Y329) for proper operation.

4. 4

   Check the voltage delivered by the transformer

   Measure the voltage delivered by the transformer (V24) to ensure it is within specifications.

5. 5

   Use the specified tool to check the 'Auto 5' module

   Use tool number 60 05 033 249 to inspect the 'Auto 5' module and replace it if necessary.