... coil-spring clutch,diameter 420mm,hydraulically operating with air assistanceTransmissionZF transmission,model ZF 5S-150GP,synchromesh, ... SystemService Brake:dual circuit compressed air brakeParking brake(emergency brake) spring energy.compressed air operating on rear wheelsAuxiliary brake ... on the vechicle and combined indicators of compressed air pressure,coolant temperature, engine oil pressure and ...