CLAAS 7690h – Claas Tr3 A57 3 Transmission Module: Automatic Hand Brake Disengaged Sensor Locked in Engaged Position

The automatic hand brake disengaged sensor is locked in the engaged position, preventing the automatic hand brake from being engaged or disengaged. The cause is that the automatic hand brake is inactive.

1. 1

   Possible open circuit in the harness of sensor (Z158)

2. 2

   The automatic hand brake engaged sensor (Z158)

3. 3

   Possible mechanical problem on the automatic hand brake

1. 1

   Use the release screw

   Use the release screw to disengage the automatic hand brake.

2. 2

   Check the sensor and harness

   Inspect the automatic hand brake engaged sensor (Z158) and the harness for any faults.

3. 3

   Use the specified tool

   Use the “Auto 5” module with tool n° 60 05 033 249 to check and change if required.