Product Introduction

• Structure: Precision closed-die forging from 20CrMnTi alloy steel, featuring an external involute tooth profile (16 teeth) and a keyed inner bore for fixed engagement with the left output shaft. The gear teeth undergo full carburizing, quenching, and precision grinding, achieving surface hardness HRC 58–62(anti-pitting/wear) and core hardness HRC 33–45 (anti-impact fracture). The keyway ensures a secure, non-slip connection to the shaft.

• Performance: The carburized tooth surface resists pitting and wear during frequent low-to-medium speed shifting, maintaining smooth meshing with the countershaft gear for over 50,000 hours of operation. The keyed inner bore ensures a rigid, non-slip connection to the left output shaft, preventing slippage under medium torque loads. The precision-ground tooth profile minimizes meshing noise and vibration, improving driving comfort.

Core Function

1. 2nd gear power transmission: Meshes with the countershaft 2nd gear to transmit torque from the countershaft to the left output shaft, supporting low-to-medium speed driving (20–40 km/h).

2. Fixed shaft engagement: The keyed inner bore locks the gear to the left output shaft, ensuring torque is transferred without slippage.

3. High wear resistance: The hardened tooth surface withstands millions of meshing cycles without deformation or pitting.

Output Shaft 2nd Gear AZ2210030203 – SINOTRUK HW Series Gearbox Replacement Part

Premium Output Shaft 2nd Gear AZ2210030203 for SINOTRUK HW Series Gearbox – Built to Endure Heavy-Duty Demands

When your fleet depends on seamless power transmission, every single gear inside the gearbox matters. The Output Shaft 2nd Gear AZ2210030203 is a critical component engineered specifically for the SINOTRUK HW Series Gearbox, ensuring smooth torque delivery and reliable shifting under the most demanding operating conditions. Whether you are restoring a transmission to factory specs or stocking fast-moving replacement parts for your distribution network, this gear delivers the precision, durability, and performance your customers expect.

At Mettlead, we supply this output shaft 2nd gear directly from certified production lines in China, which means you get genuine-quality parts at a competitive factory-direct price — without any middlemen eating into your margins. As a result, wholesale distributors and aftermarket agents around the world trust us to keep their inventory flowing and their end users satisfied.

Key Features and Benefits of the Output Shaft 2nd Gear AZ2210030203

This isn’t just another gear on a shelf. Here’s why the AZ2210030203 output shaft 2nd gear stands out in the aftermarket parts supply chain:

• OEM-Grade Precision: Manufactured to match the original SINOTRUK specifications, this gear integrates flawlessly into the HW series gearbox without any modification or adaptation required.
• Superior Material Composition: Forged from high-strength alloy steel, then heat-treated for optimal hardness and wear resistance. Consequently, the gear teeth maintain their profile even after hundreds of thousands of kilometers.
• Smooth Power Transmission: The precisely ground tooth surface minimizes friction and noise during gear engagement, which directly translates to smoother shifting and reduced driver fatigue.
• Extended Service Life: Thanks to advanced carburizing and quenching processes, this output shaft 2nd gear resists pitting, spalling, and fatigue cracking far better than generic alternatives.
• Wholesale-Friendly Pricing: Because we source directly from the factory floor, you benefit from competitive bulk pricing that protects your profit margins while keeping your catalog competitive.
• Fast Global Delivery: Our logistics team dispatches orders promptly, so whether you are in Africa, the Middle East, Southeast Asia, or South America, your parts arrive on schedule.

Technical Specifications – Output Shaft 2nd Gear AZ2210030203

Accurate specifications matter, especially when you’re matching parts to a customer’s exact gearbox model. Below you’ll find the detailed parameters for this SINOTRUK HW series gearbox output shaft 2nd gear:

Application Scenarios – Where Does the AZ2210030203 Fit?

The Output Shaft 2nd Gear AZ2210030203 is designed as a direct replacement part for the SINOTRUK HW series gearbox. More specifically, it serves as the 2nd gear mounted on the output shaft assembly, which is responsible for transferring engine torque to the driveline during second-gear operation.

This gear is commonly required in the following situations:

• Gearbox Overhaul: During a full transmission rebuild, worn or damaged gears need to be replaced to restore factory shifting performance. The AZ2210030203 ensures proper meshing and load distribution once reinstalled.
• Preventive Maintenance: Fleet managers who run SINOTRUK HOWO heavy trucks on long-haul routes often replace high-wear gears proactively to avoid unplanned downtime.
• Failure Replacement: If drivers report grinding noises, difficulty engaging second gear, or unusual vibrations, the output shaft 2nd gear is one of the first components to inspect and replace.

Compatible Vehicle Models:

• SINOTRUK HOWO A7 / T7H / T5G heavy-duty trucks
• SINOTRUK SITRAK C7H / C5H series
• Vehicles equipped with HW19710, HW15710, HW19712 gearboxes
• Other SINOTRUK models utilizing the HW series transmission platform

Looking for more gearbox components? Browse our full selection of gearbox parts and SINOTRUK HOWO gearbox parts to find everything you need for a complete rebuild.

OEM/ODM Capability – Custom Packaging and Branding

As a wholesale distributor or regional agent, your brand identity matters. That’s precisely why Mettlead offers flexible OEM and ODM services for the Output Shaft 2nd Gear AZ2210030203 and our entire catalog of SINOTRUK gearbox parts:

• White-Label Packaging: Receive products in neutral boxes, ready for your own labels and branding materials.
• Custom Packaging: We can print your logo, part number, and brand name directly on the packaging — giving your products a professional, branded appearance that builds customer loyalty.
• Strict Quality Control: Every gear undergoes dimensional inspection, hardness testing, and visual inspection before shipment. We maintain consistent quality across all batch orders, so your customers receive the same reliable part every time.
• Flexible MOQ: Whether you need a trial order to test the market or a full container load, our team works with you to structure quantities that match your business needs.

For full details on branding options or to explore our complete range of SINOTRUK HOWO truck parts and spare parts, feel free to reach out to our team.

Customer Case Study – Output Shaft 2nd Gear AZ2210030203 in Action

One of our long-standing partners, a truck parts distributor based in East Africa, was facing repeated customer complaints about premature gearbox failure in SINOTRUK HOWO trucks operating on rugged terrain. After investigating, they discovered the root cause was substandard aftermarket gears that couldn’t withstand the high-torque loads typical of heavy haulage routes.

They turned to Mettlead and placed an initial order of 200 pieces of the Output Shaft 2nd Gear AZ2210030203 for their SINOTRUK HW series gearbox rebuild kits. Within three months, the feedback was overwhelmingly positive — their workshop partners reported smoother shifting, zero premature failures, and significantly reduced warranty claims.

As a result, this distributor now orders the AZ2210030203 on a quarterly basis, along with a full range of SINOTRUK HW gearbox parts from our catalog. They also adopted our custom packaging service, which helped them strengthen their own brand presence in the local market. Today, they consider the Output Shaft 2nd Gear AZ2210030203 one of their best-selling gearbox components — and a product that consistently builds trust with their downstream customers.

Frequently Asked Questions – Output Shaft 2nd Gear AZ2210030203

1. What gearbox models is the Output Shaft 2nd Gear AZ2210030203 compatible with?

The AZ2210030203 output shaft 2nd gear is specifically designed for the SINOTRUK HW series gearbox, including models HW19710, HW15710, and HW19712. It fits HOWO A7, T7H, SITRAK C7H, and other heavy-duty trucks that use this transmission platform.

2. What material is the Output Shaft 2nd Gear AZ2210030203 made from?

This gear is manufactured from high-strength alloy steel. It undergoes carburizing and quenching heat treatment to achieve a tooth surface hardness of HRC 58–62, which provides exceptional wear resistance and fatigue strength under heavy-load conditions.

3. How can I verify that the AZ2210030203 gear matches my gearbox assembly?

We recommend cross-referencing the OEM part number AZ2210030203 with your gearbox model and checking the output shaft assembly diagram in your service manual. Additionally, our technical team can help you confirm fitment — simply send us your gearbox nameplate details.

4. What causes premature wear on the output shaft 2nd gear?

Common causes include insufficient lubrication, contaminated gearbox oil, misalignment during installation, or operating the vehicle consistently under overloaded conditions. Using a genuine-spec replacement like the AZ2210030203 and following proper installation torque procedures significantly extends gear life.

5. Do you offer other gears and components for the SINOTRUK HW series gearbox?

Absolutely. We supply a comprehensive range of SINOTRUK HW gearbox parts including input shaft gears, countershaft gears, synchronizer assemblies, bearings, and seals. You can explore our full SINOTRUK HOWO gearbox parts catalog for a complete overview.

6. What is the recommended installation practice for the AZ2210030203 gear?

Always clean the output shaft thoroughly before installation. Inspect mating surfaces for burrs or scoring. Apply a thin film of gearbox oil to the gear bore before pressing it into position, and ensure you torque all retaining components to the manufacturer’s specified values. Following these steps helps the gear seat properly and perform as intended.

Ready to Stock the Output Shaft 2nd Gear AZ2210030203? Let’s Talk.

If you’re a wholesale distributor, aftermarket agent, or fleet parts buyer looking for a reliable supply of the Output Shaft 2nd Gear AZ2210030203 for SINOTRUK HW Series Gearbox, Mettlead is your direct factory-to-warehouse partner. We offer competitive pricing, flexible MOQs, custom packaging, and fast international shipping to keep your business moving.

Don’t let gearbox part shortages slow down your operations. Contact us today to request a wholesale quote, discuss bulk order pricing, or arrange a factory visit. Our team is ready to support your growth with quality SINOTRUK parts delivered on time, every time.