Functions 
This range of spring brake chambers is used on axles fitted with drum brakes to provide the service(and secondary) and  parking brake functions. The release tool allows the parking brake force to be removed if pressure no longer present.  
                           
Techmical features
Maximum operating pressure: 1MPa                   
Operating temperature range: -40℃ to +80℃                 
Medium:   Compressed air                     
Product standard:   SAE J1469 Aug 95