Product Introduction

This gasket is a critical sealing component for the transmission’s range shift system, designed to withstand the pressure and vibration of heavy-duty operation while preventing air and fluid leaks.

• Structure & Material: Constructed from a high-temperature, oil-resistant rubber or composite material, often with a metal core for rigidity. The surface is precision-molded to match the mating surfaces of the cylinder and housing.

• Sealing Performance: The flexible material conforms to minor surface irregularities, creating a tight, durable seal that prevents the loss of pneumatic pressure (for the range shift cylinder) and the entry of gear oil or contaminants.

• Durability: The compound is engineered to resist degradation from heat, oil, and vibration, ensuring long service life even in harsh operating conditions.

Core Function

1. Pressure Retention: Maintains pneumatic pressure in the range shift cylinder to ensure reliable actuation of the high/low range shift.

2. Contamination Prevention: Blocks the entry of gear oil, dirt, and moisture into the cylinder, protecting internal components from wear and corrosion.

3. Vibration Resistance: The flexible material absorbs vibration, maintaining a consistent seal even under dynamic loads.

Sealing Gasket WG2229280001 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox demands a reliable seal, the Sealing Gasket WG2229280001 delivers leak-free performance you can count on. Engineered specifically for heavy-duty transmission applications, this gasket prevents oil seepage, protects internal gearbox components from contamination, and ensures smooth power transfer under the harshest operating conditions. Whether you are maintaining a fleet or stocking your parts warehouse, this is the exact OEM-specification sealing gasket that keeps SINOTRUK trucks running without costly downtime.

At Mettlead, we supply this gearbox sealing gasket directly from our factory in China — which means you get genuine quality at a competitive wholesale price, with flexible ordering and fast international shipping to your doorstep.

Features and Benefits of Sealing Gasket WG2229280001

This SINOTRUK HW gearbox sealing gasket is far more than a simple rubber ring. It is a precision-manufactured component that plays a critical role in maintaining transmission integrity. Here is what makes it stand out:

• OEM-Grade Fit: Manufactured to match original SINOTRUK specifications, ensuring a perfect seal without modifications or forced fitting.
• Superior Oil Resistance: Constructed from high-quality sealing material that resists degradation from transmission oil, heat, and pressure cycling.
• Extended Service Life: Engineered to withstand prolonged heavy-duty use, reducing replacement frequency and lowering your total maintenance cost.
• Leak Prevention: Maintains a tight, consistent seal across mating surfaces to prevent gearbox oil leakage — protecting both the transmission and the environment.
• Easy Installation: Designed for straightforward replacement during routine gearbox maintenance, minimizing labor time and vehicle downtime.
• Temperature Tolerance: Performs reliably across a wide temperature range, from cold starts to sustained high-load operating conditions.

In short, choosing the right sealing gasket for your SINOTRUK HW series gearbox is not just about stopping leaks — it is about protecting your entire drivetrain investment.

Technical Specifications – Sealing Gasket WG2229280001

Application Scenarios – Where Does This Sealing Gasket Fit?

The Sealing Gasket WG2229280001 is designed specifically for the SINOTRUK HW series gearbox, which is widely used across multiple heavy truck platforms. If you are working on any of the following vehicles or transmission systems, this is the part you need:

• Compatible Gearbox Models: HW19710, HW19712, HW15710, HW10, HW13, HW16, and other HW series variants.
• Compatible Truck Models: SINOTRUK HOWO A7, HOWO T7H, SITRAK C7H, SITRAK C5H, and related heavy-duty models equipped with HW transmissions.
• Typical Use Cases: Routine gearbox overhaul, oil leak repair, preventive maintenance during fleet servicing, and post-accident transmission rebuilds.

Whenever a technician opens up an HW series gearbox for inspection or repair, replacing the sealing gasket WG2229280001 is a recommended best practice — even if the old gasket appears intact. Prevention is always cheaper than emergency repair on the roadside.

Looking for more SINOTRUK gearbox components? Browse our full range of gearbox parts and SINOTRUK HOWO gearbox parts for everything from bearings to synchronizer rings.

OEM/ODM Capability and Custom Packaging

Mettlead understands that B2B buyers often need more than just a part — they need a supply partner who adapts to their business model. That is exactly what we offer:

• White-Label Packaging: We can ship Sealing Gasket WG2229280001 in neutral packaging, so you can resell under your own brand without any visible supplier markings.
• Custom Packaging: Need your company logo, part labels, or specific barcode formats on the box? We handle it all in-house.
• Strict Quality Control: Every sealing gasket goes through dimensional inspection and material testing before it leaves our facility. We control quality at the source so you never have to worry about receiving substandard parts.
• Flexible Order Quantities: Whether you need 50 pieces for a trial order or 5,000 for container loading, our production capacity scales to your demand.
• Factory Visits Welcome: We invite all prospective partners to visit our facility in China to see our production line, quality processes, and warehousing firsthand.

For more details about our full SINOTRUK parts catalog, visit our SINOTRUK HOWO truck parts brand page.

Customer Case Study – Sealing Gasket WG2229280001 Bulk Order

Earlier this year, a fleet maintenance company based in East Africa reached out to Mettlead with a recurring problem: their SINOTRUK HOWO trucks were experiencing frequent gearbox oil leaks after using low-quality aftermarket sealing gaskets. The leaks were causing premature bearing wear inside the HW series gearbox, leading to expensive overhauls and extended vehicle downtime.

After reviewing their requirements, we supplied 500 units of the Sealing Gasket WG2229280001 in custom-branded packaging, shipped via sea freight within 12 days of order confirmation. The client reported that after fitting our OEM-spec gaskets, the oil leakage issues disappeared entirely across their 80-truck fleet. They subsequently placed a repeat order for additional HW gearbox components including output shaft seals and gearbox covers.

This case illustrates a simple truth: investing in the correct sealing gasket WG2229280001 at the right price saves far more money downstream than cutting corners with unverified alternatives.

Frequently Asked Questions – Sealing Gasket WG2229280001

What is the function of Sealing Gasket WG2229280001 in the SINOTRUK HW gearbox?

The sealing gasket WG2229280001 sits between mating surfaces of the HW series gearbox housing. Its primary function is to create a leak-proof barrier that prevents transmission oil from escaping and stops external contaminants — such as dust, moisture, and road debris — from entering the gearbox. Without a proper seal, oil loss leads to increased friction, overheating, and accelerated wear of internal gears and bearings.

How do I know if my SINOTRUK gearbox sealing gasket needs replacement?

Common signs include visible oil stains or wet spots around the gearbox housing joints, a gradual drop in transmission oil level, unusual noise during gear engagement, or oil drips beneath the truck after parking. If you notice any of these symptoms, inspecting and replacing the sealing gasket WG2229280001 should be your first step.

Is this sealing gasket WG2229280001 an OEM-quality replacement?

Yes. Our Sealing Gasket WG2229280001 is manufactured to original SINOTRUK factory dimensions and material specifications. It provides a direct drop-in fit without any need for trimming, re-machining, or additional sealant application.

Can I use aftermarket sealant together with the gasket WG2229280001?

In most standard applications, the gasket alone provides a sufficient seal when the mating surfaces are clean and undamaged. However, if the housing surface has minor imperfections from previous use, a thin layer of gasket sealant can be applied as supplementary protection. Always follow the SINOTRUK workshop manual recommendations for your specific gearbox model.

What is the minimum order quantity for Sealing Gasket WG2229280001?

Mettlead offers flexible MOQs to accommodate both small trial orders and large-volume procurement. Please contact us directly with your required quantity for exact pricing and lead time.

How should I store the sealing gasket before installation?

Store the gasket in its original sealed packaging, away from direct sunlight, extreme heat, and chemical solvents. A cool, dry environment preserves the material’s elasticity and sealing properties until you are ready to install it.

Get Your Quote for Sealing Gasket WG2229280001 Today

Ready to secure a reliable supply of Sealing Gasket WG2229280001 for your SINOTRUK HW series gearbox? Mettlead makes it simple: factory-direct pricing, strict quality control, fast international shipping, and flexible payment terms designed for professional buyers.

Whether you need a sample shipment to verify quality or a full container of SINOTRUK gearbox parts, our team is standing by to assist you. Tell us your quantity, destination, and any packaging preferences — we will respond with a detailed quotation within 24 hours.

Contact Mettlead now to request pricing, check stock availability, or discuss a long-term supply partnership. Let us keep your trucks moving.