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Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
2025-05-04
Sitrak Steering Knuckle Arms And Accessories (R282/124-φ30)
Sitrak Steering Knuckle Arms And Accessories (R282/124-φ30)
2025-05-07

Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)

Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)
Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)
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What is the Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)

  • Sitrak Diaphragm Type Brake Air Chamber (20”, L=168): Heavy-Duty Braking Precision for Commercial Vehicles
  • Engineered to deliver reliable braking force and long-lasting performance, the Sitrak Diaphragm Type Brake Air Chamber (20”, L=168) is a critical component for heavy-duty trucks, buses, and industrial vehicles. With a 20-inch diaphragm diameter and 168mm stroke length, this chamber ensures consistent pressure transmission for responsive braking, even under extreme loads. Manufactured by trusted suppliers like Taian Taijing, Ningbo Wanfeng, and now including Ruili Group (part number WG4005362000), it combines robust construction with precision components to meet OEM standards and withstand harsh operating environments.
  • Core Components for Reliable Operation
  • The Diaphragm type brake air chamber (20”, L=168) features a dual-function design, integrating a service brake diaphragm and spring parking brake mechanism. The diaphragm, constructed from heavy-duty EPDM rubber with reinforced fabric layers, resists ozone, heat, and abrasion, ensuring millions of cycles without degradation. A high-tensile steel spring provides parking brake force, while the chamber’s aluminum alloy housing, coated with corrosion-resistant epoxy, protects internal components from rust and debris.
  • Secure mounting is ensured by Hexagon head bolts and Flat washers, which fasten the chamber to the brake linkage with uniform clamping force. Spring washers prevent bolt loosening from vibration, while a Cotter pin acts as a fail-safe mechanism for the pivot Pins, locking them in place to maintain structural integrity during heavy braking. These components, heat-treated to 10.9-grade strength, meet international safety standards for commercial vehicles.
  • Compatibility with Advanced Vehicle Systems
  • Designed for seamless integration, this air chamber pairs with key Sitrak components such as:
  • VGD75 Front Axle Assembly (880/2376-φ335, R282/124-φ30, Self-aligning Arm, ABS, Electronic Alarm), enabling coordinated braking with self-aligning arms and ABS functionality.
  • VGD71 Steering Shaft Assembly (880, 1645-220, with shock absorber hole), enhancing steering stability during high-pressure braking maneuvers.
  • VGD71 Front Wheel End Assembly (Φ335, ABS), working alongside ABS wheel speed sensors to prevent wheel lockup and improve control on slippery surfaces.
  • Left/Right Drum Brake Assemblies (φ400×150, self-adjusting arm, wear alarm), providing automatic clearance adjustment and wear monitoring for optimized brake performance.
  • Design for Durability and Ease of Maintenance
  • The chamber’s modular structure allows quick diaphragm replacement without disassembling the entire unit, reducing downtime for fleet maintenance. A dust-resistant boot protects the diaphragm from road grime, while the spring mechanism’s corrosion-resistant finish ensures reliable operation in salted winter roads or dusty construction sites. The 168mm stroke length balances force output and compact packaging, ideal for vehicles with space-constrained brake systems.
  • SEO-Optimized Features for Commercial Relevance
  • Keyword Precision: Prioritizes product model (20”, L=168), supplier names, and technical specs to target exact-match searches in parts catalogs and maintenance databases.
  • System Integration: Highlights compatibility with VGD axles, steering assemblies, and drum brakes to attract OEMs and fleet managers seeking holistic solutions.
  • Benefit-Driven Messaging: Emphasizes corrosion resistance, easy maintenance, and multi-supplier availability, addressing cost efficiency and reliability concerns.
  • In summary, the Sitrak Diaphragm Type Brake Air Chamber (20”, L=168) sets a standard for heavy-duty braking excellence, combining durable components, precise engineering, and broad system compatibility. Whether for long-haul trucks, urban buses, or construction machinery, trust in its performance to deliver consistent stopping power, backed by Sitrak’s commitment to quality and a network of reputable suppliers. Upgrade your braking system with a chamber designed to excel where reliability matters most.

Product Parameters of Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)

AC40413671301  Diaphragm Type Brake Air Chamber (20”, L=168)
Serial No.  Drawing No. Name Quantity
1 WG4005362000 Diaphragm type brake air chamber (20”, L=168) 1
2 Q40312 Spring washers 2
3 Q150B1235 Hexagon head bolts 2
4 Q5004025 Cotter pin 1
5 Q40112 Flat washers 3
6 Q5101240 Pins 1
WG4005362000 Diaphragm Brake Air Chamber(20”,L=168)
Serial No.  Drawing No. Name Quantity
1 WG4005362000/1 Diaphragm type brake air chamber(20”,L=168)(Taian Taijing) 1
2 WG4005362000/2 Diaphragm type brake air chamber(20”,L=168)(Ningbo Wanfeng) 1
3 WG4005362000/3 WG4005362000 to add Ruili Group as a supplier. 1
AH40LG793.2234 VGD75 Front Axle Assembly(880/2376-φ335,R282/124-φ30,Self-aligning Arm,ABS,Electronic Alarm,With Shock Absorber Hole,Model 2021)
Serial No.  Drawing No. Name Quantity
1 AH40LG793.2234 VGD75 Front Axle Assembly(880/2376-φ335,R282/124-φ30,Self-aligning Arm,ABS,Electronic Alarm,With Shock Absorber Hole,Model 2021) 1
AH40LG793.2234 VGD75 Front Axle Assembly(880/2376-φ335,R282/124-φ30,Self-aligning Arm,ABS,Electronic Alarm,With Shock Absorber Hole,Model 2021)
Serial No.  Drawing No. Name Quantity
1 AC40414171327 VGD71 STEERING SHAFT ASSEMBLY(880,1645-220,with shock absorber hole) 1
2 AC40414171833 Steering knuckle arm and attachment (R282/124-φ30) 1
3 AC40414171931 VGD71 Front wheel end assembly(Φ335,ABS) 2
4 AC40414571313 Left drum brake assembly (φ400×150, self-adjusting arm, wear alarm) 1
5 AC40414571314 Right drum brake assembly (φ400×150, self-adjusting arm, wear alarm) 1
6 AC40413671301 Diaphragm type brake air chamber(20”,L=168) 2
7 711-#4310-0322 ABS wheel speed sensor (front axle part/one side of wheel) 2
 

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