WG9000360600 L-270 diaphragm spring brake air chamber is a key pneumatic executive component for Sinotruk Howo heavy truck drum brake system. Installed on rear axle brake bracket, it converts compressed air pressure into mechanical thrust, pushes brake camshaft and brake shoes to realize braking. It adopts high-strength metal shell and high-quality rubber diaphragm, with stable sealing and fatigue resistance. Under long-time vibration, high pressure and frequent braking conditions, it can maintain stable output force. Each air chamber undergoes air tightness test, thrust inspection and fatigue durability test before delivery. It effectively prevents air leakage, insufficient braking force and slow brake release. It is a core replacement spare part for heavy truck axle brake maintenance. We maintain sufficient inventory and stable bulk supply for repair workshops, fleet operators, auto spare parts dealers and global cross-border export customers.