Product Introduction

This flat sealing gasket is a critical component for maintaining the integrity of fluid and air systems in heavy-duty vehicles, providing a reliable barrier against leaks.

• Structure & Material: Manufactured from high-quality steel with a zinc-plated, silver-colored finish for corrosion resistance. It features a precision-stamped, flat, circular design with a central hole to accommodate threaded fasteners.

• Sealing Performance: The flat, uniform surface fills minor irregularities between mating components, creating a secure seal that prevents the escape of fluids or the entry of contaminants.

• Durability: The zinc-plated coating protects against rust and corrosion, ensuring reliable performance even under high vibration and temperature fluctuations.

Core Function

1. Leak Prevention: Creates a tight seal between fasteners and components, stopping the escape of oil, fuel, and other fluids, as well as preventing the entry of dirt and moisture.

2. Load Distribution: Distributes the clamping force of the fastener evenly across the component surface, reducing the risk of damage or deformation.

3. Corrosion Resistance: The zinc-plated coating ensures long service life in harsh operating environments.

Sealing Gasket Q72310 for SINOTRUK HW Series Gearbox – Factory Direct Wholesale Supply

When it comes to keeping your SINOTRUK HW series gearbox running leak-free and at peak performance, the Sealing Gasket Q72310 plays a quiet but critical role. This precision-engineered gasket sits between mating surfaces inside the gearbox housing, preventing oil leakage, blocking contaminants, and maintaining the internal pressure balance your transmission needs to shift smoothly under heavy loads. At Mettlead, we supply this genuine-spec sealing gasket directly from our factory in China — giving wholesale distributors and fleet operators access to competitive pricing, consistent quality, and fast global delivery.

Why the Sealing Gasket Q72310 Matters for Your SINOTRUK HW Gearbox

Think of the sealing gasket as the silent guardian of your gearbox. Without a properly fitted Q72310 gasket, transmission oil seeps out through joint surfaces, leading to premature gear wear, overheating, and costly downtime. Moreover, dust and moisture can creep in, accelerating internal corrosion. In other words, a small gasket failure can quickly snowball into a major transmission overhaul.

Here is exactly what the Sealing Gasket Q72310 delivers once installed:

• Leak-proof sealing performance — Precision-cut to match OEM gearbox housing dimensions, ensuring a flush, gap-free fit that stops oil leaks at the source.
• Heat and pressure resistance — Engineered from high-grade sealing material that withstands the elevated temperatures and pressure cycling inside HW series transmissions.
• Extended gearbox service life — By maintaining proper lubrication levels and preventing contamination, this gasket helps protect gears, bearings, and synchronizers from premature failure.
• Drop-in OEM replacement — Matches the original SINOTRUK factory specifications for part number Q72310, so installation is straightforward with no modifications required.
• Cost-effective bulk pricing — As a factory-direct supplier, Mettlead eliminates middlemen, which means better margins for distributors and parts dealers.

Application Scenarios — Which Vehicles and Gearboxes Use the Q72310 Sealing Gasket?

The Sealing Gasket Q72310 is specifically designed for the SINOTRUK HW series gearbox, one of the most widely deployed heavy-duty transmissions across Chinese truck brands. Consequently, you will find this gasket serving as a critical sealing component in the following applications:

• SINOTRUK HOWO A7 / T7H / T5G heavy-duty trucks equipped with HW19710 / HW19712 transmissions
• SINOTRUK SITRAK C7H tractor units and dump trucks with HW gearbox variants
• SINOTRUK HOWO heavy-duty mining trucks operating under extreme load conditions
• Various SINOTRUK mixer trucks, cargo trucks, and tractor heads using HW series 9/10/12-speed manual transmissions

Whether your customers run long-haul logistics fleets across Africa and Southeast Asia or operate mining and construction vehicles in the Middle East, this sealing gasket is an essential maintenance and repair item they reorder consistently. That recurring demand makes the Q72310 a smart addition to any gearbox parts inventory.

Technical Specifications — Sealing Gasket Q72310

For a complete catalog of transmission sealing and related components, feel free to browse our full SINOTRUK HOWO gearbox parts collection.

OEM/ODM Capability — White-Label and Custom Packaging for Distributors

As a wholesale distributor or regional agent, your brand identity matters. That is precisely why Mettlead offers flexible OEM and ODM services for the Sealing Gasket Q72310 and our entire SINOTRUK HOWO truck parts lineup:

• White-label packaging — We ship with your brand name, logo, and part numbering on the box, so your customers see your identity, not ours.
• Custom packaging design — Need specific box sizes, barcode placement, or multilingual labels for your target market? Our team handles it.
• Strict quality control — Every batch of sealing gaskets undergoes dimensional inspection, material hardness testing, and surface finish checks before leaving our warehouse.
• Flexible MOQ arrangements — Whether you are testing a new market with a trial order or restocking in bulk containers, we structure quantities to fit your cash flow.
• Fast, reliable delivery — With ready stock on popular SKUs like Q72310, lead times stay short even during peak season.

In short, you get factory-direct pricing combined with the branding freedom to build your own reputation in the aftermarket.

Customer Case Study — Sealing Gasket Q72310 Bulk Order for East African Distributor

Earlier this year, a truck parts distributor based in Nairobi, Kenya reached out to Mettlead looking for a reliable source for SINOTRUK HW series gearbox sealing gaskets. Their workshop clients were experiencing frequent gearbox oil leaks on HOWO trucks, and the locally sourced gaskets did not hold up beyond a few thousand kilometers.

After sending samples of our Sealing Gasket Q72310 for workshop testing, the feedback came back positive — zero leaks after 20,000 km of heavy-load operation. Consequently, the distributor placed an initial bulk order of 2,000 pieces with custom-branded packaging featuring their company logo and Swahili-language installation notes.

Within six months, they reordered three additional batches and expanded their procurement to include other SINOTRUK HW gearbox parts such as oil seals, bearings, and synchronizer rings. Today, they cite the Q72310 sealing gasket as one of their fastest-moving SKUs — proof that consistent quality and factory-direct pricing build long-term business.

Frequently Asked Questions — Sealing Gasket Q72310 SINOTRUK HW Series Gearbox

What is the exact function of Sealing Gasket Q72310 inside the HW gearbox?

The Sealing Gasket Q72310 is positioned between two mating surfaces of the SINOTRUK HW gearbox housing. Its primary job is to create an oil-tight seal that prevents transmission fluid from leaking out and blocks external contaminants like dust and water from entering. This keeps internal components properly lubricated and protected.

Is this Sealing Gasket Q72310 an OEM-spec part or aftermarket?

Mettlead supplies the Q72310 as an OEM-spec replacement gasket. It is manufactured to match the original SINOTRUK dimensions, material composition, and sealing performance. As a result, it fits perfectly without any modification, just like the factory-installed original.

How can I tell if my Sealing Gasket Q72310 needs replacement?

Common signs include visible oil seepage around gearbox housing joints, a gradual drop in transmission oil level, and unusual shifting behavior caused by low lubrication. If you notice oily residue forming on the outside of the gearbox casing, the sealing gasket is very likely compromised and should be replaced promptly to avoid internal damage.

What material is the Q72310 Sealing Gasket made from?

It is manufactured from a high-temperature resistant composite sealing material designed to withstand the thermal cycling, oil exposure, and clamping pressure found inside heavy-duty truck transmissions. This material maintains its elasticity and sealing integrity across a wide temperature range from -40°C to +150°C.

Can I order Sealing Gasket Q72310 with my own brand packaging?

Absolutely. Mettlead provides full white-label and custom packaging services. You can specify your brand name, logo, part number format, barcode style, and even multilingual labels. This is particularly popular among regional distributors who want to build brand recognition in their local market.

What is the minimum order quantity for wholesale pricing on Q72310?

MOQ depends on whether you need standard neutral packaging or custom branding. For neutral-packed orders, our minimum is quite flexible — ideal for first-time buyers testing quality. For white-label orders, a slightly higher MOQ applies to cover packaging setup costs. Contact us directly for a tailored quote.

Ready to Stock the Sealing Gasket Q72310? Let’s Talk Pricing.

If you are a parts distributor, fleet maintenance company, or wholesale buyer looking for a dependable factory source for SINOTRUK HW series gearbox sealing gaskets, Mettlead is ready to support your business. We offer competitive factory-direct pricing, flexible payment methods, fast shipping, and the option to visit our facility in China for a firsthand quality inspection.

Take the next step — contact us today to request a wholesale quote for the Sealing Gasket Q72310 or any other parts from our comprehensive SINOTRUK HOWO truck parts catalog. Our team typically responds within 24 hours with pricing, MOQ details, and shipping options tailored to your region.