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Sitrak Left Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
Sitrak Left Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
2025-05-04
Sitrak Diaphragm Type Brake Air Chamber (20”, L=168)
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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)
Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
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What is the Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)

  • Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm): Precision Braking for Heavy-Duty Reliability​
  • Engineered for commercial vehicles demanding superior stopping power and minimal maintenance, the Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm) combines robust construction, intelligent self-adjustment, and advanced wear monitoring to deliver consistent performance in the most challenging environments. Designed for right-side applications, this assembly integrates high-quality components from trusted manufacturers like Shandong Lead and Jiangsu Huali, ensuring compliance with OEM standards and long-term durability.​
  • Core Structural Components for Optimal Braking​
  • The Front right brake assembly (φ400×150, self-adjusting arm, wear alarm) serves as the foundation, featuring a 400mm diameter brake drum and 150mm width, precision-cast from heat-resistant gray iron to withstand intense friction and thermal stress. The Brake clearance automatic adjusting arm(right) eliminates manual intervention by dynamically compensating for brake shoe wear, maintaining optimal clearance between the friction lining and drum—critical for consistent pedal feel and reduced downtime. This arm, paired with Hexagon head bolts M20*1.5 and Hexagonal head bolt M14*1.5 (grade 10.9, zinc-plated for corrosion resistance), ensures secure mounting and reliable force transmission during braking.​
  • Brake Shoe System: Wear-Resistant and Efficient​
  • The Brake Shoe (I), lined with a high-friction organic compound Friction Lining, is riveted to the shoe using Rivets for maximum bond strength, resisting delamination under heavy loads. Mounted on the Shoe Shaft (secured by Shoe Shaft Set Screw and Steel wire lock wire), the shoe articulates smoothly via Bushings-Brake Shoe, reducing friction and wear. The Return spring and Return spring retaining pin ensure rapid reset after brake release, minimizing residual drag and improving fuel efficiency.​
  • Camshaft and Lubrication System: Smooth Operation​
  • The Right camshaft, forged from alloy steel and heat-treated for hardness, actuates the brake shoes with precision, supported by Camshaft washer ring and Flexible Retaining Ring for Shaft-Camshaft to prevent axial movement. A Brake base plate right WG4071455512-011(Zhucheng Yihe), constructed from high-strength steel, houses the camshaft and features an Oil cup 45°M10X1 for easy lubrication with high-temperature grease, while Brake base plate oil seal assembly and Roller Oil Seal prevent contamination and oil leakage. The Roller and Roller shaft (secured by Clip ring-roller shaft) reduce friction between moving parts, enhancing mechanical efficiency.​
  • Sealing and Protection: Defending Against Contaminants​
  • Dust and debris are kept at bay by Dust cover, Clogging-dust cover, and ABS hole rubber plug, protecting sensitive components like the camshaft and wear sensor. These covers, paired with O-ring and Roller Oil Seal, create a tight barrier against moisture and road grime, extending component life in harsh environments. The Flexible washer-dust cover and Bolt-Dust Cover further shield fasteners from corrosion, ensuring long-term structural integrity.​
  • Advanced Wear Monitoring and Safety Features​
  • The Wear alarm assembly (H653) and Electronic wear sensor assembly continuously monitor friction lining thickness, triggering a visual or electronic alert when wear approaches critical levels—an essential feature for proactive maintenance and regulatory compliance. High-tensile Hexagon nuts (fine thread) and Elastic washers secure the sensor and other components, while Adjustment washers allow precise calibration of the self-adjusting arm for optimal clearance.​
  • Manufacturer Compatibility and Quality Assurance​
  • Available from reputable suppliers like Shandong Lead and Jiangsu Huali, this assembly meets rigorous testing for fade resistance, thermal stability, and cycle life. The Front Right Brake Base Plate Assembly and related components undergo magnetic particle inspection to ensure defect-free performance, while Rivet and Screw-Shoe Shaft installations are torque-tested to OEM specifications.​
  • SEO-Optimized Features for Commercial Fleets​
  • Keyword Precision: Integrates product dimensions (φ400×150), features (self-adjusting arm, wear alarm), and manufacturer names to target niche searches.​
  • Technical Depth: Details material science (alloy steel, high-friction lining) and component functions (automatic adjustment, wear sensing) to attract mechanical professionals.​
  • Benefit-Driven Messaging: Emphasizes reduced maintenance, safety compliance, and durability, addressing fleet managers’ priorities for cost efficiency and uptime.​
  • In summary, the Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm) sets a standard for heavy-duty braking excellence, combining rugged construction, intelligent self-adjustment, and advanced wear monitoring. Ideal for trucks, buses, and industrial vehicles, it ensures safe, reliable stops mile after mile—backed by Sitrak’s commitment to engineering precision and commercial vehicle innovation.

Product Parameters of Sitrak Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)

AC40414571314 Right Drum Brake Assembly (φ400×150, Self-Adjusting Arm, Wear Alarm)
Serial No.  Drawing No. Name Quantity
1 ZQ151B1445TF6 Hexagon head bolts M14*1.5 2
2 ZQ151B2045TF6 Hexagonal head bolt M20*1.5 2
3 WG4071450012 Front right brake assembly (φ400×150, self-adjusting arm, wear alarm) 1
4 WG4005456212 Brake clearance automatic adjusting arm(right) 1
WG4071450012 Front right brake assembly (φ400×150, self-adjusting arm, wear alarm)
Serial No.  Drawing No. Name Quantity
1 WG4071450012/1 Front right brake assembly(φ400×150,wear alarm)(Shandong Lead) 1
2 WG4071450012/2 Front Right Brake Assembly(φ400×150,Wear Alarm) (Jiangsu Huali) 1
WG4071450012/1 Front right brake assembly (φ400×150, wear alarm) (Shandong Lead)
Serial No.  Drawing No. Name Quantity
1 WG4005455501+001/1 Brake Shoe (I) 2
2 WG4005455501+003/1 Bushings-Brake Shoe 2
3 WG4071450012+001/1 Brake base plate right WG4071455512-011(Zhucheng Yihe) 1
4 WG4005455501+005/1 Shoe Shaft Set Screw 2
5 WG4005455501+006/1 Steel wire lock wire 1
6 WG4005455501+007/1 Shoe Shaft 2
7 WG4005455501+008/1 Return spring 1
8 WG4005455522+001/1 Right camshaft 1
9 WG4005455501+010/1 Shaft retaining ring 2
10 WG4005455501+011/1 Return spring retaining pin 2
11 WG4005455501+012/1 Brake base plate oil seal assembly 1
12 WG4005455501+013/1 Brake Base Plate Bushings 2
13 WG4005455501+015/1 Clip ring-roller shaft 2
14 WG4005455501+016/1 Roller 2
15 WG4005455501+017/1 Roller shaft 2
16 WG4005455501+018/1 Oil cup 45°M10X1 1
17 WG4005455501+019/1 Dust cover 1
18 WG4005455521+002/1 Camshaft washer ring 1
19 WG4005455501+021/1 Clogging-dust cover 2
20 WG4005455501+022/1 Spring washers 4
21 WG4005455501+023/1 Hexagon head bolts 4
22 WG4005455501+025/1 Adjustment washers 4
23 WG4005455501+026/1 Flexible Retaining Ring for Shaft-Camshaft 1
24 WG4005455501+027/1 ABS hole rubber plug 1
25 WG4005455501+028/1 Friction Plate 4
26 WG4005455541+006/1 Roller Oil Seal 4
27 WG4005455541+007/1 O-ring 4
28 WG4070453011+004/1 Rivet 20
29 WG4005455552+002/1 Spring washers 2
30 WG4005455552+003/1 Nuts 2
31 WG4005455552+004/1 Flat pin 2
32 WG4005455552+021/1 Wear alarm assembly (H653) 1
WG4071450012/2 Front right brake assembly(φ400×150,wear alarm)(Jiangsu Huali)
Serial No.  Drawing No. Name Quantity
1 WG4071450011+001/2 Brake Shoe 2
2 WG4071450011+002/2 Friction Lining 4
3 WG4071450011+003/2 Rivet 24
4 WG4071450011+004/2 Return spring shaft 2
5 WG4071450012+001/2 Front right camshaft 1
6 WG4071450011+006/2 Hexagon nuts 2
7 WG4071450011+007/2 Flexible washer 2
8 WG4071450012+002/2 Front Right Brake Base Plate Assembly 1
9 WG4071450012+003/2 Right dust cover 1
10 WG4071450011+010/2 Camshaft retaining ring 1
11 WG4071450011+011/2 Adjustment washers 4
12 WG4071450011+012/2 Return Spring 1
13 WG4071450011+013/2 Plug-Dust Cover 2
14 WG4071450011+014/2 Bolt-Dust Cover 6
15 WG4071450011+015/2 Flexible washer-dust cover 6
16 WG4071450011+016/2 Front Shoe Piece Shaft 2
17 WG4071450011+017/2 O-Ring 4
18 WG4071450011+018/2 Screw-Shoe Shaft 2
19 WG4071450011+019/2 ABS Plug 1
20 WG4071450011+020/2 Snap ring-Roller shaft 2
21 WG4071450011+021/2 Roller Oil Seal 4
22 WG4071450011+022/2 Roller 2
23 WG4071450011+023/2 Roller shaft 2
24 WG4071450011+024/2 Electronic wear sensor assembly 1
25 WG4071450011+025/2 Flexible retaining rings for shafts 1
26 WG4071450011+026/2 Flat pins 1
27 WG4071450011+027/2 Hexagon nuts (fine thread) 1
28 WG4071450011+028/2 Elastic washers 1

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