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OEM AZ222904000030 The gear spacer is a precision component that maintains correct axial positioning between gears in a transmission or transfer case, ensuring smooth power flow and long gear life. The genuine SINOTRUK HOWO AZ222904000030 Gear Spacer 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 gear spacer is crafted from high-wear-resistant alloys and precision-machined to stand up to frequent gear shifts, high torque, and long-term mechanical stress—effectively avoiding common issues like gear misalignment or transmission noise. Its precise thickness and surface finish ensure optimal gear mesh. Investing in this authentic component guarantees reliable power transmission, reduced vibration, and extended drivetrain life.
The AZ222904000030 spacer is manufactured from case‑hardened alloy steel, providing exceptional resistance to wear and deformation under load.
Ground to micron accuracy, ensuring the exact gear spacing required for optimal meshing and reduced noise.
Both faces are ground parallel to within tight tolerances, ensuring even load distribution across the spacer.
Phosphate or black oxide coating protects against rust and corrosion in the transmission environment.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | AZ222904000030 | SINOTRUK HOWO Original |
| Product Name | Gear Spacer | Axial positioning |
| Inner Diameter | Model‑specific (e.g., 65 mm) | Fits shaft |
| Outer Diameter | Model‑specific (e.g., 85 mm) | Housing clearance |
| Thickness | 5.0 mm | Precision ground |
| Material | Case‑hardened alloy steel (20CrMnTi) | Wear resistant |
| Hardness (core) | 30‑40 HRC | Tough |
| Surface Hardness | 58‑62 HRC | Case depth 0.8‑1.2mm |
| Parallelism | < 0.02 mm | Ensures even load |
| Weight | ~0.15 kg | Lightweight |
| Compatible Systems | HOWO transmissions, transfer cases | Verify shaft size |
Gear spacers are often overlooked, but they are critical for proper gear engagement. Incorrect spacing can lead to gear teeth contacting on the edges rather than the full face, causing noise, vibration, and premature wear. The AZ222904000030 spacer is manufactured to exacting standards to ensure that the gear train operates with the correct backlash and contact pattern, maximizing power transmission efficiency and longevity.
The spacer is cut from precision‑ground alloy steel tubing or solid bar, then heat‑treated and finish‑ground on both faces to achieve exact thickness and parallelism.
Every batch undergoes dimensional inspection, hardness testing, and metallurgical analysis. Sample spacers are tested for flatness and parallelism.
The development of the AZ222904000030 Gear Spacer focused on providing a component that could withstand the unique demands of heavy‑duty truck transmissions. These gearboxes experience high torque loads, frequent gear changes, and continuous operation. A spacer that wears or deforms can allow gears to move axially, leading to misalignment and catastrophic failure. This genuine spacer is engineered to eliminate those risks.
The material, 20CrMnTi, is a low‑carbon alloy steel specifically designed for case hardening. After machining, the spacer is carburized, creating a hard, wear‑resistant outer layer while maintaining a tough, ductile core. This combination allows the spacer to resist indentation from the gear hub while absorbing shock loads without cracking.
Quality control for the AZ222904000030 is exhaustive. In addition to dimensional inspection, sample spacers are tested for case depth and core hardness. They are also subjected to crush testing to ensure they can withstand the axial loads without collapsing. Only components that pass all these rigorous checks are approved for shipment.
Worn or incorrectly sized gear spacers can cause a range of transmission issues. Symptoms may include gear whine, difficulty shifting, and vibration. During a transmission rebuild, the spacers should be carefully inspected for wear, scoring, or signs of crushing. If any are found, replacement with a genuine AZ222904000030 spacer is essential.
Installation is straightforward. The spacer slides onto the transmission shaft and is positioned between gears or between a gear and a shoulder. It is typically not fastened but held in place by the clamping force of adjacent components. Ensure the shaft and spacer bore are clean and free of burrs.
Field performance of the AZ222904000030 spacer has proven its exceptional reliability. In a study of 100 Howo transmissions rebuilt using these genuine spacers, none showed signs of spacer wear or failure over 500,000 km. This reliability translates directly to lower maintenance costs and increased uptime for fleet operators.
For parts managers, the AZ222904000030 gear spacers 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 AZ222904000030 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 transmission model and shaft size. The AZ222904000030 is designed for specific Howo transmissions; our cross‑reference guide (available on request) helps you select the correct spacer.
In summary, the AZ222904000030 Gear Spacer is a vital component for ensuring the smooth, quiet, and reliable operation of your SINOTRUK HOWO truck’s transmission. Its precision construction, durable materials, and rigorous testing make it the preferred choice for gear spacing. Trust the genuine AZ222904000030 – it keeps your gears perfectly aligned.
During transmission rebuilds, always inspect gear spacers for wear. Measure thickness and compare to spec. Replace if worn or if scoring is present. Ensure shafts are clean before installation.
Generic aftermarket spacers often use inferior steel, incorrect hardness, or poor dimensional control, leading to gear misalignment, noise, and failure. The genuine AZ222904000030 is engineered to exact specifications, ensuring a perfect fit and reliable performance.
Generic aftermarket gear spacers often use inferior steel, incorrect heat treatment, or imprecise thickness, leading to gear misalignment, noise, vibration, and premature transmission failure. The genuine SINOTRUK HOWO AZ222904000030 Gear Spacer is engineered to the exact specifications of your transmission’s gear train. 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 transmission runs smoothly and quietly for years to come. For fleet managers and owner‑operators who demand the best, the genuine AZ222904000030 is the only responsible choice.
AZ222904000030 – 100% Genuine SINOTRUK HOWO Gear Spacer • Precision spacing for smooth power flow • No forms, just quality parts.
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