Product Introduction

This precision-machined gasket is a critical component for maintaining the correct alignment and preload of the sun gear in the planetary gearset.

• Structure & Material: Made from high-strength alloy steel, it features a thin, uniform circular profile with two notches for precise rotational alignment. The surface is precision-ground for accuracy and corrosion resistance.

• Performance: The precisely controlled thickness ensures accurate axial spacing, preventing excessive endplay or preload in the sun gear and bearings. The notches ensure it locks securely into position, preventing rotation.

• Durability: The hardened steel construction withstands high torque loads and friction, maintaining its shape and precision over time.

• Compatibility: Direct OE replacement, fully matching the dimensional specifications of the HW19710 transmission’s planetary gear system.

Core Function

1. Precision Spacing: Maintains the exact axial position of the sun gear, ensuring optimal meshing with planet gears and preventing wear.

2. Alignment: The notches lock the gasket in place, preventing rotation and ensuring perfect alignment of the sun gear within the planetary gearset.

3. Sealing: Provides a barrier between the sun gear and adjacent components, preventing gear oil from escaping and maintaining proper lubrication.

Sun Gear Gasket (Front) AZ2229100005 – SINOTRUK HW Series Gearbox

When your SINOTRUK HW series gearbox demands precision-engineered components, the Sun Gear Gasket (Front) AZ2229100005 delivers exactly what you need. This critical transmission component ensures proper sealing and smooth gear engagement at the front end of the planetary gear system. Manufactured to OEM specifications and supplied directly from our factory in China, this gasket eliminates the guesswork from your procurement process — giving you guaranteed fitment, competitive pricing, and fast global delivery.

Why This Sun Gear Gasket (Front) AZ2229100005 Matters for Your Fleet

The sun gear gasket sitting at the front of the HW series gearbox plays a quietly essential role. It maintains proper clearance and sealing between the sun gear and its mating surfaces, preventing oil leakage and ensuring that torque transfers smoothly through the planetary gear set. Without a properly functioning gasket here, you risk accelerated wear, gear noise, and eventually costly transmission failures.

Here is what makes the Mettlead-supplied AZ2229100005 sun gear gasket stand out:

• OEM-Grade Material: Manufactured from high-quality gasket material that resists heat, pressure, and transmission fluid degradation over extended service intervals.
• Precision Dimensional Accuracy: Every gasket is cut and finished to exact OEM tolerances, ensuring a drop-in fit with zero modifications required.
• Extended Service Life: Engineered to withstand the demanding operating conditions inside heavy-duty truck gearboxes, including high temperatures and constant mechanical stress.
• Leak Prevention: The tight seal provided by this front sun gear gasket protects against oil seepage that can compromise gearbox performance and longevity.
• Cost-Effective Maintenance: Factory-direct pricing means you can stock these gaskets affordably, reducing your per-unit repair costs significantly.

Technical Specifications – Sun Gear Gasket (Front) AZ2229100005

Application Scenario – Where Does This Gasket Fit?

The Sun Gear Gasket (Front) AZ2229100005 is specifically designed for the front-end sun gear assembly within the SINOTRUK HW series heavy-duty gearbox. This transmission platform is widely used across SINOTRUK HOWO, SITRAK, and related heavy truck models that rely on the HW15710, HW19710, and similar gearbox variants.

If you are maintaining or overhauling gearboxes for any of the following applications, this gasket is what you need:

• SINOTRUK HOWO heavy-duty trucks equipped with HW series manual transmissions
• SITRAK C7H / T7H models using HW gearbox platforms
• Mining trucks, construction vehicles, and long-haul logistics fleets running SINOTRUK powertrains
• Aftermarket gearbox rebuild and repair workshops servicing Chinese-brand heavy trucks

In other words, wherever a SINOTRUK HW series gearbox is working hard, this front sun gear gasket is quietly keeping things sealed, aligned, and running as they should. Browse our full range of gearbox parts and SINOTRUK HOWO gearbox parts for more transmission components.

OEM/ODM Capability and Flexible Supply

At Mettlead, we understand that procurement managers need more than just a part — they need a reliable supply partner. That is exactly what we offer:

• White-Label and Custom Packaging: Whether you need neutral packaging for your own brand or custom labeling for distribution, we handle it seamlessly.
• Strict Quality Control: Every Sun Gear Gasket (Front) AZ2229100005 passes through multiple inspection stages before it leaves our facility. Dimensional checks, material verification, and surface quality inspection are all standard.
• Factory-Direct Pricing: By eliminating middlemen, we pass genuine cost savings to you. This makes bulk ordering and inventory stocking far more economical.
• Fast and Reliable Delivery: Our logistics network ensures your gearbox parts reach you quickly — whether you are in Africa, the Middle East, Southeast Asia, or South America.
• Flexible Payment Options: We support multiple secure payment methods to accommodate your company’s financial processes.
• Visitor-Friendly: You are welcome to visit our facilities for an on-site inspection before committing to large orders.

Explore our complete catalog of SINOTRUK HOWO truck parts to see the full breadth of what we supply.

Customer Case Study – Sun Gear Gasket (Front) AZ2229100005 in Action

A fleet maintenance company based in East Africa was experiencing recurring oil leakage from the front planetary section of HW19710 gearboxes across their SINOTRUK HOWO truck fleet. After diagnosing the root cause, their technicians determined that the existing sun gear gaskets had degraded prematurely due to substandard aftermarket quality.

They reached out to Mettlead for a bulk supply of Sun Gear Gasket (Front) AZ2229100005 parts. After receiving their first shipment of 200 pieces, the client reported that the gaskets fitted perfectly without any trimming or adjustment. Within two months, they had completed gearbox repairs on over 30 trucks, and the leakage issues were fully resolved.

The client subsequently placed repeat orders and expanded their purchasing to include additional SINOTRUK HW gearbox components from our catalog. Their feedback highlighted three points: precise OEM-matching dimensions, competitive unit cost, and delivery that arrived ahead of schedule.

Frequently Asked Questions – Sun Gear Gasket (Front) AZ2229100005

What is the function of the Sun Gear Gasket (Front) in the HW series gearbox?

The sun gear gasket (front) serves as a sealing and spacing element between the sun gear and its adjacent housing or gear plate at the front of the planetary assembly. It prevents oil leakage, maintains correct component clearance, and ensures smooth torque transmission through the gear set.

Is this AZ2229100005 gasket compatible with all HW gearbox models?

Yes, the AZ2229100005 Sun Gear Gasket (Front) is designed for the SINOTRUK HW series gearbox family, including HW15710, HW19710, and related variants. However, if you are unsure about compatibility with a specific gearbox model, feel free to send us your VIN or gearbox nameplate information and we will confirm fitment for you.

How can I tell if the sun gear gasket needs replacement?

Common signs include oil seepage around the front section of the gearbox, unusual gear noise during shifting, or visible gasket deterioration during a routine gearbox inspection. If you are performing a gearbox overhaul, replacing the sun gear gasket as a preventative measure is always recommended.

What material is this gasket made from?

The AZ2229100005 front sun gear gasket is manufactured from a high-grade composite material specifically formulated to resist transmission fluid, heat cycling, and mechanical compression. This ensures it maintains its sealing integrity over tens of thousands of kilometers.

Can I order this gasket in bulk with custom packaging?

Absolutely. Mettlead supports white-label and custom-branded packaging for all parts, including the Sun Gear Gasket (Front) AZ2229100005. Just let us know your packaging specifications when you submit your inquiry.

What is the typical lead time for this part?

For standard stock orders, we typically ship within 3–7 business days. Larger bulk orders or custom-packaged shipments may require 10–15 days depending on quantity. We will confirm exact lead times when you request a quote.

Ready to Secure Your Supply of Sun Gear Gasket (Front) AZ2229100005?

Whether you need 10 pieces or 10,000, Mettlead is your factory-direct source for SINOTRUK HW series gearbox parts. We combine strict quality control with pricing that makes sense for your bottom line — and we ship to wherever your fleet operates.

Take the next step today: Contact us now to request a competitive quote on the Sun Gear Gasket (Front) AZ2229100005. Our team typically responds within 24 hours with pricing, availability, and shipping options tailored to your location.

Your gearboxes work hard. Make sure they are sealed right.