What causes air leakage in the handbrake chamber?
1 Answers
Continuous air leakage from the exhaust port of the handbrake valve is caused by poor sealing between the intake valve and its seat. This can be resolved by replacing the intake valve seal using a repair kit. Damage or scoring to the piston seal ring of the spring brake chamber, or scoring on the chamber cylinder wall, can all lead to air leakage in the chamber. When the vehicle is in parking brake mode, air leakage from the relay valve will not cause any malfunction to the vehicle, as this is clearly the intake of the brake valve.