- ADDRESS:Wanda Plaza, Jinan, Shandong, China
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com


OEM AZ400745400150 The backing pin is a critical component in heavy‑duty brake and suspension systems, providing a precise pivot point for brake shoes or other moving parts. The genuine SINOTRUK HOWO AZ400745400150 Backing Pin is an OEM‑grade component engineered for a perfect fit and long‑term durability. As a critical element of the trusted Sinotruk howo parts family, this backing pin is crafted from high-strength, anti-corrosion steel and reinforced alloys to bear heavy loads, resist road impacts, and stand up to harsh weather—effectively supporting key chassis components like axles, leaf springs, and stabilizer bars.
The AZ400745400150 pin is manufactured from premium alloy steel, providing exceptional shear strength and resistance to bending.
Induction hardened to a precise depth for maximum wear resistance.
Centerless ground to a mirror finish for smooth rotation in the eye.
Zinc‑plated or phosphate coating protects against rust.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | AZ400745400150 | SINOTRUK HOWO Original |
| Product Name | Backing Pin | Brake shoe anchor pin |
| Diameter | Model‑specific (e.g., 22 mm) | Precision ground |
| Length | Model‑specific (e.g., 85 mm) | Overall |
| Material | Case‑hardened alloy steel | 58‑62 HRC surface |
| Hardness (core) | 25‑35 HRC | Tough core |
| Surface Finish (Ra) | < 0.2 µm | Mirror finish |
| Operating Temp | -40°C to +150°C | All‑climate use |
| Weight | ~0.2 kg | Varies by size |
| Compatible Systems | Brake shoe anchor, suspension | Verify application |
In heavy‑duty drum brakes, the backing pin serves as the anchor point for the brake shoes. It must withstand immense forces during braking without bending or wearing. A worn pin can cause the shoes to misalign, leading to uneven brake wear, reduced stopping power, and potentially dangerous brake pull. The AZ400745400150 pin is engineered with a case‑hardened surface that resists wear from the shoe’s eye, and a tough core that absorbs shock loads without deforming.
The pin is cut from bar stock, then centerless ground to final diameter. It is induction hardened to achieve a wear‑resistant surface while maintaining a tough core. Ends are chamfered for easy installation.
Every batch undergoes dimensional inspection, hardness testing, and surface finish verification. Sample pins are tested for shear strength.
The development of the AZ400745400150 Backing Pin focused on providing a component that could withstand the unique demands of heavy‑duty truck brake systems. During braking, the pins are subjected to high shear forces and repeated loading. A pin that wears or bends can cause the brake shoes to move out of alignment, leading to reduced braking efficiency and uneven lining wear. This genuine pin is engineered to eliminate those risks.
The material, typically a medium‑carbon alloy steel, is chosen for its ability to be case‑hardened. This creates a hard, wear‑resistant surface on the pin’s diameter while keeping the core tough to absorb shock loads. The case depth is carefully controlled to ensure optimal performance and long life.
Quality control for the AZ400745400150 is exhaustive. In addition to dimensional inspection, sample pins are tested for surface hardness and case depth. They are also subjected to microscopic inspection to ensure a defect‑free surface. Only components that pass all these rigorous checks are approved for shipment.
A worn or damaged backing pin can cause a range of issues. Symptoms include uneven brake wear, a pulling sensation during braking, and knocking noises from the brake assembly. During brake service, the pins should be carefully inspected for wear, pitting, or bending. If any are found, replacement with a genuine AZ400745400150 pin is essential.
Installation is straightforward. The old pin is driven out, the hole is cleaned, and the new pin is driven in. It may be secured with a retaining clip or bolt. Ensure the pin is fully seated and that the brake shoe moves freely on the pin.
Field performance of the AZ400745400150 pin has proven its exceptional reliability. In a study of 100 Howo trucks, none showed signs of pin failure over 500,000 km. This reliability translates directly to lower maintenance costs and increased uptime for fleet operators.
For parts managers, the AZ400745400150 backing pins are available individually or in sets, each with a lot traceability label and a QR code linking to installation instructions. Bulk orders (50+ units) receive additional packaging discounts and priority handling.
Warranty and support for the AZ400745400150 are comprehensive. SINOTRUK HOWO provides a 2‑year/unlimited mileage warranty against manufacturing defects. Our technical support team is available via email to answer any questions regarding installation or compatibility, and we are committed to providing a response within 24 hours.
When ordering, always verify your brake system type and pin dimensions. The AZ400745400150 is designed for specific Howo applications; our cross‑reference guide (available on request) helps you select the correct pin.
In summary, the AZ400745400150 Backing Pin is a vital component for ensuring the reliable, safe braking of your SINOTRUK HOWO truck. Its precision construction, durable materials, and rigorous testing make it the preferred choice for backing pins. Trust the genuine AZ400745400150 – it anchors your brakes securely.
During brake service, inspect backing pins for wear. Clean and lubricate with high‑temperature brake grease. Replace if worn or damaged. Ensure proper retention.
Generic aftermarket pins often use inferior steel, incorrect hardness, or poor surface finish, leading to rapid wear and brake failure. The genuine AZ400745400150 is engineered to exact specifications, ensuring a perfect fit and reliable performance.
Generic aftermarket backing pins often use inferior steel, incorrect heat treatment, or poor surface finish, leading to rapid wear, bending, and brake system failure. The genuine SINOTRUK HOWO AZ400745400150 Backing Pin is engineered to the exact specifications of your truck’s brake system. It is manufactured under strict quality controls, undergoing rigorous testing against international standards (e.g., ISO, CE) and Sinotruk’s original specs. Using premium, wear-resistant materials ensures it withstands the extreme demands of heavy‑duty diesel operation, delivering consistent performance and long life.
By choosing the authentic part, you protect your investment and ensure your brakes perform reliably for years to come. For fleet managers and owner‑operators who demand the best, the genuine AZ400745400150 is the only responsible choice.
AZ400745400150 – 100% Genuine SINOTRUK HOWO Backing Pin • The anchor your brakes rely on • No forms, just quality parts.