Description
Ensure absolute heavy-vehicle safety and dependable parking control with the genuine Knorr-Bremse Heavy Duty Air Brake Actuator & Spring Brake Chamber. Engineered specifically for heavy commercial transport trucks, multi-axle freight trailers, and vocational coaches, this robust dual-chamber actuator combines a responsive service brake section with a powerful high-tension parking spring brake. Leaking diaphragms, cracked housings, and fatigued internal springs severely compromise emergency stopping ability and cause hazardous parking brake drag. This professional-grade brake chamber solves those failures directly. It utilizes heavy-gauge corrosion-resistant steel, reinforced elastomer diaphragms, and precision internal valving to deliver rapid pneumatic response, secure mechanical parking retention, and long-lasting durability in severe highway environments.
Technical Parameters
| Category | Specifications & Technical Details |
| High-Tension Parking Spring Energy System | We integrate an ultra-high-strength mechanical energy storage spring inside the chamber. Consequently, it instantly releases massive thrust when air supply is lost or parking brake engagement is triggered. Moreover, it keeps heavy vehicles absolutely locked on steep slopes. |
| Dual-Chamber Independent Pneumatic Control Architecture | We adopt an independently isolated service brake chamber and parking release chamber design. As a result, even if one air circuit pressure becomes abnormal, the other system keeps operating independently. |
| Reinforced High-Pressure Multi-Layer Rubber Diaphragm | We equip the chamber with a fabric-reinforced multi-layer composite rubber diaphragm. Therefore, it withstands extreme operating temperatures from -40°C to +100°C. Notably, it never develops diaphragm cracking or air leakage. |
| Heavy-Duty Corrosion-Resistant Powder-Coated Housing | We stamp the housing from high-strength heavy-duty steel. Additionally, the surface carries an industrial-grade anti-corrosion powder coating. Consequently, it perfectly resists road de-icing salt, mud, and high-humidity salt spray erosion. |
| Precision Threaded Push Rod & Mechanical Release Bolt | We integrate a standard-stroke precision push rod and a safety mechanical release bolt. As a result, technicians can safely perform manual emergency brake release when the vehicle has no air supply. |
Applicable Car Brands & Models
Common warning symptoms include:
Air Leaks Around the Chamber Housing: Audible hissing sounds near the brake chamber body or push rod area during braking or parking release.
Parking Brake Drag or Failure to Release: The vehicle fails to move smoothly because the internal spring brake refuses to release fully due to low air pressure or internal spring damage.
Slow Braking Response: A noticeable delay between pressing the brake pedal and actual wheel-end deceleration caused by ruptured internal diaphragms.
Visible Housing Corrosion or Cracks: Heavy rust perforation or physical cracking on the steel body from road salt exposure.
Yes, but only for emergency towing or maintenance purposes while the vehicle is safely chocked on level ground. Releasing a spring brake manually deactivates the emergency parking lock, which creates a severe runaway hazard if proper safety precautions are ignored.
While replacing a single damaged chamber is common, replacing them in axle pairs (both left and right wheels) is strongly recommended to maintain balanced braking force and even push-stroke performance across the axle.
Each brake chamber is securely fitted with plastic port caps to keep out internal dust, wrapped in VCI anti-corrosion film, and packed inside a heavy-duty corrugated industrial box to ensure safe global wholesale transit.
