CLAAS 7691h: TR3 (A57-3) Open circuit on the automatic hand brake disengaging solenoid valve

The automatic hand brake disengaging solenoid valve is experiencing an open circuit, preventing the automatic hand brake from disengaging. This issue can be temporarily resolved by using the release screw to disengage the automatic hand brake.

1. 1

   The automatic hand brake disengaging solenoid valve

2. 2

   The circuit connected to the automatic hand brake disengaging solenoid valve

1. 1

   Inspect the automatic hand brake disengaging solenoid valve

   Check for visible damage, loose connections, or signs of failure on the automatic hand brake disengaging solenoid valve.

2. 2

   Test the circuit connected to the automatic hand brake disengaging solenoid valve

   Use a multimeter or appropriate testing equipment to verify continuity and voltage in the circuit.

3. 3

   Replace or repair the automatic hand brake disengaging solenoid valve if necessary

   If the solenoid valve is faulty, replace it with a compatible component. If the circuit is damaged, repair or replace the wiring as needed.