Rear Brake Shoe Return Spring DZ95009440015
After releasing the brake, relying on the spring force, the two brake shoes are pulled back to their original position, allowing the brake pads to separate from the brake drum and eliminating the drag brake. Keeping the brake shoes in their reset position and maintaining the stability of the braking gap is an indispensable elastic component for the drum brake system.
Material: High carbon alloy spring steel (65Mn spring steel wire), formed by one-piece bending; surface treated with galvanization / colored zinc for rust prevention. The steel wire is quenched and tempered to achieve a stable shape, ensuring long-lasting elasticity, resistance to fatigue, and rust and corrosion resistance in muddy water, salt and alkali environments.
Product Features
1. Standard total length is 250mm. It is produced by the original factory, with the hook angle and the number of loops perfectly matched. It can be directly replaced without the need for modification.
2. The double-hook structure is formed integrally, with a smooth hook head, making it less likely to come off or break.
3. After fatigue tensile tests, the elasticity decreases minimally after repeated stretching and rebounding, and it is durable under heavy-load frequent braking conditions.
4. Galvanized anti-corrosion coating protects against mud, water, and salt fog, reducing the probability of chassis rusting and failure.
5. The tension is uniform and stable, ensuring synchronous return of the left and right brake shoes and balanced braking force on both sides.
The problem solved
1. The elasticity of the old spring decreases, elongates or breaks → The brake pads cannot return to their normal position, causing drag braking and heating of the wheel hubs;
2. Drag braking leads to abnormal rapid wear of the brake pads, increased fuel consumption, and in severe cases, overheating and burning of the brake drums;
3. Unequal tension of the left and right springs → Unequal braking force on the left and right wheels, causing brake drift;
4. Rust and fracture of the spring, stuck brake pads, posing potential safety hazards during driving;
5. Increased braking clearance, unstable braking response, and increased braking pedal travel.
Q: Which truck models does it fit?
A: Fit for Shacman Delong series heavy-duty trucks, used on rear drum brake assembly.
Q: What is the function of brake shoe return spring?
A: It connects two brake shoes inside drum brake. When brake pedal is released, the spring pulls brake shoes back to original position, separates brake lining from brake drum to eliminate dragging brake. It keeps stable brake clearance.
Q: What material is this spring made of?
A: Made of high-carbon alloy spring steel (65Mn). Heat treatment for stable elasticity. Surface galvanized for rust and corrosion resistance.
Q: What are the advantages of this spring?
A: Standard size 250mm, direct replacement without modification.
• Integrated hook design, not easy to break or unhook.
• Good fatigue resistance, elasticity does not drop quickly after repeated braking.
• Galvanized coating, anti-rust for muddy and salt-spray working environment.
• Uniform tension to ensure synchronous return of left and right brake shoes.
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