This standard stipulates unified performance indicators for the service brake assemblies of trucks and buses. This standard applies to hydraulically driven or pneumatically driven service brakes of trucks and buses with a total mass of 1800kg to 30000kg.
QC/T 239-1997 history
2015QC/T 239-2015 Specifications and bench test methods for commercial vehicle service brake
1997QC/T 239-1997 Performance requirements for brakes of trucks and passenger cars