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Sitrak Brake Air Chambers (27/27)
Sitrak Brake Air Chambers (27/27)
2025-05-04
Sitrak VGD71 Steering Shaft Assembly (880,1679-225)
Sitrak VGD71 Steering Shaft Assembly (880,1679-225)
2025-05-04

Sitrak Truck Brake Air Chambers (27/27)

Sitrak Truck Brake Air Chambers (27/27)
Sitrak Truck Brake Air Chambers (27/27)
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What is the Sitrak Truck Brake Air Chambers (27/27)

  • Sitrak Truck Brake Air Chambers (27/27): Reliable Stopping Performance for Commercial Vehicles​
  • Engineered to meet the rigorous demands of heavy-duty trucks, the Sitrak Truck Brake Air Chambers (27/27) deliver consistent braking force, rapid response, and long-lasting durability. Designed for vehicles relying on air brake systems, these chambers integrate a high-stroke Diaphragm spring brake air chamber L=220 with robust mounting components—Pins, Cotter Pins, and Flat washers—to ensure safe, efficient operation in even the most challenging environments.​
  • High-Performance Diaphragm Spring Brake Air Chamber​
  • The Diaphragm spring brake air chamber L=220 is the core of the assembly, featuring a 220mm stroke length optimized for maximum braking force in large commercial trucks. This dual-function chamber combines a service brake diaphragm for regular braking and a spring-applied parking brake, providing seamless transition between dynamic stopping and stationary  (parking brake) applications. The diaphragm, constructed from heavy-duty ethylene-propylene-diene monomer (EPDM) rubber, resists ozone, heat, and chemical corrosion, ensuring reliable performance over millions of cycles. The integrated spring mechanism, made from high-tensile alloy steel, maintains consistent pressure to prevent brake fade during prolonged use, critical for maintaining control on steep inclines or during emergency stops.​
  • Secure Mounting with Industrial-Grade Fasteners​
  • Pins and Cotter Pins form the backbone of the chamber’s mounting system, securing it to the brake linkage with precision. The pins, heat-treated to withstand shear forces and impact, are crafted from carbon steel with a zinc-nickel plating for superior corrosion resistance—ideal for trucks operating in salted roads or high-moisture environments. Cotter Pins, inserted through transverse holes at the pin tips, act as a fail-safe mechanism, locking the pins in place and preventing accidental disengagement due to vibration or heavy braking. This design ensures the air chamber remains securely aligned, minimizing wear on connected components and maintaining braking efficiency.​
  • Complementing the pins are Flat washers, precision-stamped from stainless steel to distribute clamping force evenly across the chamber’s mounting flange. These washers eliminate stress concentrations around bolt holes, protecting the chamber body from deformation and enhancing the longevity of both the washer and the air chamber. Their smooth surface reduces friction during installation, allowing for quick, hassle-free maintenance—a key advantage for fleet managers aiming to minimize downtime.​
  • Design for Heavy-Duty Excellence​
  • The “27/27” designation refers to the chamber’s dual 27-in³ (442cc) air volumes for service and spring brake functions, balancing power output with compact packaging. The chamber housing, constructed from impact-resistant aluminum alloy, is lightweight yet durable, with a powder-coated finish to resist scratches and rust. Internal components are engineered to minimize air leakage, ensuring rapid pressure buildup and precise modulation, the critical for anti-lock braking system (ABS) compatibility and smooth brake pedal feel.​​
  • Model & Specs: Prominently features “27/27” and “L=220” to target exact product searches and technical documentation queries.​
  • Component Focus: Integrates “Pins,” “Cotter Pins,” and “Flat washers” to enhance visibility in parts catalogs and maintenance guides.​
  • Benefit-Driven Keywords: Emphasizes “heavy-duty,” “corrosion-resistant,” and “long-lasting durability” to address fleet operators’ priorities for safety and cost efficiency.​
  • In summary, the Sitrak Truck Brake Air Chambers (27/27) set a standard for reliability and performance in commercial vehicle braking systems. With a long-stroke diaphragm chamber, secure mounting components, and rugged construction, they deliver consistent stopping power, even under extreme loads or harsh conditions. Trust in Sitrak’s engineering expertise to keep your fleet safe, compliant, and operational—mile after demanding mile.

Product Parameters of Sitrak Truck Brake Air Chambers (27/27)

AC71823600202  Brake Air Chambers (27/27)
Serial No.   Drawing No. Name  Quantity
1 Q5101440 Pins 2
2 Q5004025 Cotter Pins 2
3 Q40114 Flat washers 2
4 WG9000360661 Diaphragm spring brake air chamber L=220 2

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