Product Introduction

• Structure: High- strength aluminum alloy housing with integrated double shift rods, pre installed pneumatic lock valve, double- H valve, oil seal (SKF 62×85×10), and oil resistant gasket. Bolt pattern: M10×1.25 (8-bolt circle).

• Performance: Sealing pressure up to 300kPa; operating temperature: -40°C to +150°C. Ensures smooth, reliable shifting with pneumatic lock to prevent mis selection.

Core Function

1. Shift Control: Houses double shift rods to actuate 1st/2nd, 3rd/4th gear synchronizers via external linkage.

2. Pneumatic Lock: Prevents accidental gear engagement/disengagement under heavy load or vibration.

3. Double -H  Valve: Enables high/low range selection for 10-speed operation.

4. Sealing & Lubrication: Maintains gearbox oil pressure and prevents leakage; protects internal components.

10-Gears Small Cover Assy AZ2203210040+001 | OEM Gearbox Parts for SINOTRUK HOWO HW Transmission

When your SINOTRUK HOWO heavy truck demands reliable shifting performance, every single gearbox component matters. The 10-Gears Small Cover Assy AZ2203210040+001 is a precision-engineered transmission component designed to maintain consistent gear engagement and protect internal mechanisms within the HW series gearbox. Sourced directly from our factory in China, this small cover assembly delivers OEM-grade fitment at a competitive price point — so your fleet stays on the road without compromise.

At Mettlead, we specialize in supplying genuine-quality Chinese heavy truck parts to procurement managers worldwide. Whether you are maintaining a single vehicle or managing a fleet of hundreds, this 10-gears small cover assembly offers the durability and dimensional accuracy your HW transmission needs to perform under demanding conditions.

Key Features and Benefits of the 10-Gears Small Cover Assy AZ2203210040+001

This gearbox small cover assembly is more than just a housing component — it plays a critical role in sealing, protecting, and supporting internal gear mechanisms. Here is what makes it stand out:

• Precise OEM Fitment: Manufactured to match original SINOTRUK specifications, the AZ2203210040+001 small cover assy installs seamlessly without modifications, reducing downtime during replacement.
• Superior Sealing Performance: The cover assembly ensures a tight seal over the 10-gear section of the HW transmission, preventing lubricant leakage and contamination ingress that could damage internal gears.
• High-Grade Material Construction: Crafted from robust cast alloy materials, this small cover withstands vibration, thermal cycling, and mechanical stress encountered in heavy-duty trucking operations.
• Extended Service Life: Strict quality control during production means each unit undergoes dimensional inspection and surface finish verification, resulting in components that last as long as OEM originals.
• Cost-Effective Factory Direct Pricing: By sourcing directly from Mettlead, you eliminate middlemen and access wholesale pricing without sacrificing quality.
• White-Label and Custom Packaging Available: If you operate a distribution business, we offer private-label packaging to support your brand identity.

Technical Specifications

Below you will find the detailed parameters for the 10-Gears Small Cover Assy AZ2203210040+001. These specs are essential for verifying compatibility with your specific HW gearbox model:

Application Scenarios: Where Does the AZ2203210040+001 Small Cover Assy Fit?

Understanding exactly where this component belongs helps you make a confident purchasing decision. The 10-Gears Small Cover Assy AZ2203210040+001 is specifically designed for the following applications:

• Compatible Transmission: SINOTRUK HW Series 10-Speed Manual Gearbox
• Compatible Vehicles: SINOTRUK HOWO heavy-duty trucks equipped with HW 10-gear transmissions, including A7, T7H, and related models
• Component Category: Gearbox / Transmission Cover Parts
• Function: Serves as the protective cover assembly for the small gear section, maintaining structural integrity and lubrication containment within the 10-speed gearbox housing

This part is commonly replaced during scheduled transmission overhauls, after detecting oil seepage around the gearbox cover area, or when physical damage from road debris compromises the cover’s sealing surface. If your HW gearbox shows signs of lubricant loss near the small cover region, timely replacement of the AZ2203210040+001 prevents cascading internal damage.

Explore more gearbox components in our Gearbox Parts Category or browse our complete SINOTRUK HOWO Gearbox Parts collection.

OEM/ODM Capability

Mettlead understands that different markets have different requirements. That is why we offer flexible OEM and ODM services for the 10-Gears Small Cover Assy AZ2203210040+001 and our entire transmission parts catalog:

• White-Label Packaging: Receive parts in neutral or your own branded packaging, ready for direct resale in your local market.
• Custom Packaging Design: We support bespoke packaging solutions including custom labels, barcodes, and multilingual product information inserts.
• Strict Quality Control: Every batch undergoes comprehensive inspection — from raw material verification through dimensional checks to final surface quality assessment — ensuring consistent OEM-equivalent performance.
• Flexible Order Quantities: Whether you need a small trial order or container-load volumes, our production capacity accommodates your requirements.
• Factory Visits Welcome: We encourage procurement managers to visit our facility in China to inspect production processes, verify quality standards, and build long-term supply confidence.

For more details on our SINOTRUK parts range, visit our dedicated SINOTRUK HOWO Truck Parts brand page.

Customer Case Study: 10-Gears Small Cover Assy AZ2203210040+001 in Action

A fleet management company based in West Africa reached out to Mettlead after experiencing recurring transmission oil leakage across multiple HOWO trucks in their logistics fleet. Upon diagnosis, their local mechanics identified worn-out small cover assemblies on several HW 10-speed gearboxes as the root cause.

After reviewing part specifications, their procurement manager ordered a batch of 10-Gears Small Cover Assy AZ2203210040+001 units directly from us. Within five working days, the order was dispatched via sea freight with custom-labeled packaging matching their in-house inventory system.

Once installed, the replacement AZ2203210040+001 small cover assemblies completely resolved the oil seepage issues. The fleet reported smoother gear engagement and zero recurrence of lubricant loss over six months of continuous heavy-haul operation. The procurement manager has since become a repeat customer, expanding orders to include additional HOWO gearbox parts for preventive maintenance stock.

Frequently Asked Questions About the 10-Gears Small Cover Assy AZ2203210040+001

What is the function of the 10-Gears Small Cover Assy in an HW gearbox?

The 10-Gears Small Cover Assy AZ2203210040+001 serves as a protective enclosure and sealing component for a specific gear section within the HW 10-speed transmission. It prevents gear oil from leaking out while keeping dust, moisture, and contaminants from entering the gearbox internals. In addition, it provides structural support to internal shifting mechanisms.

How do I confirm that AZ2203210040+001 fits my HOWO truck?

First, verify that your vehicle uses an HW series 10-speed manual gearbox. Then, cross-reference the OEM part number AZ2203210040+001 with your existing gearbox cover assembly. If you are unsure, send us your VIN or gearbox nameplate photo, and our technical team will confirm compatibility free of charge.

What causes the small cover assembly to fail or leak?

Over time, constant vibration and thermal expansion cycles can degrade the sealing surfaces of the cover assembly. Road debris impact, improper torque during previous installations, or using incompatible gasket sealants may also compromise the cover’s integrity. Regular inspection during scheduled transmission services helps catch early signs of wear.

Is this small cover assy an original OEM part or aftermarket?

Mettlead supplies OEM-equivalent quality parts manufactured to original SINOTRUK specifications. While these are not branded SINOTRUK-in-box components, they match OEM dimensions, material grades, and performance characteristics — delivering the same reliability at a more competitive price.

Can I order the 10-Gears Small Cover Assy AZ2203210040+001 in small quantities?

Absolutely. We offer flexible minimum order quantities to accommodate both small workshop owners and large-scale fleet operators. Whether you need one piece for an urgent repair or fifty units for warehouse stock, we can accommodate your order efficiently.

What is the typical lead time for this gearbox cover assembly?

For in-stock items, we typically dispatch within 3–7 working days. During peak demand periods or for large custom orders, lead times may extend slightly. We always communicate realistic timelines before order confirmation so you can plan accordingly.

Ready to Order the 10-Gears Small Cover Assy AZ2203210040+001?

Stop letting gearbox cover leaks slow your fleet down. The 10-Gears Small Cover Assy AZ2203210040+001 is in stock and ready to ship to your location worldwide. With factory-direct pricing, strict quality assurance, and fast delivery from Mettlead, you get the reliability your HW transmission demands — without the inflated cost.

Get your personalized quote today. Send us your quantity requirements, shipping destination, and any packaging preferences. Our team typically responds within 24 hours with competitive pricing and accurate lead times.

👉 Contact Us Now to Request a Quote

Mettlead — Your Trusted Factory-Direct Source for SINOTRUK, HOWO, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON Heavy Truck Parts.