Product Introduction

Structure: A precision-molded nitrile rubber seal with a metal reinforcing ring, featuring a lip design to maintain a tight seal against the hub and axle shaft. The dimensions (140x160x11) ensure a perfect fit for the front wheel hub assembly.Performance: Provides a reliable barrier to prevent hub oil leakage, while blocking dirt, water, and debris from entering the bearing cavity. The durable rubber material resists wear, heat, and chemical degradation, ensuring long-term sealing performance.Design: Directly interchangeable with original equipment, engineered to fit perfectly with the front wheel hub and axle shaft, maintaining a secure, leak-free seal.

Core Function

• Leakage Prevention: Seals the front wheel hub to prevent lubricating oil from leaking out, ensuring proper lubrication of the wheel bearings.

• Contaminant Protection: Blocks dirt, water, and debris from entering the bearing cavity, reducing wear and extending bearing service life.

• Durability: The high-quality rubber and metal construction resists wear and environmental damage, ensuring reliable sealing performance under heavy-duty conditions.

Front Wheel Oil Seal 140x160x11 WG9003074387 for Sinotruk HOWO Heavy Trucks

When your heavy-duty truck hits the road, every component works together to keep things running smoothly. The Front Wheel Oil Seal 140x160x11 WG9003074387 is one of those unsung heroes — quietly sitting inside the front wheel hub assembly, holding lubricating oil in place while keeping harmful contaminants out. Engineered specifically for Sinotruk HOWO vehicles, this precision-molded seal delivers reliable, long-lasting protection that fleet managers and procurement professionals can count on. Whether you’re maintaining a single truck or managing an entire fleet, choosing the right oil seal means fewer breakdowns, lower maintenance costs, and more uptime on the road.

At Mettlead, we supply this genuine-quality front wheel oil seal directly from our factory in China, offering competitive pricing without compromising on performance. As a trusted global supplier of Sinotruk truck parts, we understand what procurement managers need: accurate specifications, dependable quality, and fast delivery.

Key Features and Benefits of the Front Wheel Oil Seal WG9003074387

This isn’t just a rubber ring — it’s a carefully engineered sealing solution designed to perform under the toughest conditions. Here’s what makes it stand out:

Superior Sealing Performance

The front wheel oil seal features a precision lip design that maintains constant contact with the hub and axle shaft surface. This ensures a tight, leak-free barrier that keeps hub oil exactly where it belongs. As a result, your wheel bearings stay properly lubricated at all times, significantly extending their service life.

Built to Withstand Harsh Environments

Made from high-quality nitrile rubber (NBR), this seal resists heat, chemical degradation, and mechanical wear. Furthermore, it incorporates a metal reinforcing ring that provides structural rigidity, preventing deformation even under heavy loads and high temperatures. In other words, it thrives in the demanding conditions that heavy trucks face daily.

Contaminant Protection

Road dust, water, mud, and debris are constant threats to your front wheel bearings. This oil seal acts as a dependable shield, blocking all external contaminants from entering the bearing cavity. Consequently, you avoid premature bearing failure and costly unplanned repairs.

Perfect OE Fitment

With precise dimensions of 140mm × 160mm × 11mm, this seal is directly interchangeable with the original equipment part. It drops right into the front wheel hub assembly without any modifications, making installation quick and hassle-free for your maintenance team.

Cost-Effective Maintenance Solution

By preventing oil leakage and contamination, this small yet critical component helps you avoid expensive bearing replacements and hub overhauls. In the long run, investing in a quality oil seal saves significantly more than it costs.

Technical Specifications

Application Scenarios

The Front Wheel Oil Seal 140x160x11 WG9003074387 is specifically designed for the following applications:

• Compatible Vehicles: Sinotruk HOWO heavy-duty trucks, including A7, T7H, and other models equipped with the standard front axle assembly.
• Installation Position: Front wheel hub — installed between the hub and the axle shaft to seal the bearing cavity.
• Primary Function: Retaining lubricating oil within the front wheel hub to ensure proper bearing lubrication.
• Secondary Function: Preventing road dust, mud, water, and other debris from infiltrating the bearing cavity and causing premature wear.

Whether your trucks operate on paved highways or rough construction sites, this oil seal performs consistently. It’s particularly essential for fleets operating in dusty, wet, or extreme-temperature environments where contaminant intrusion is a constant risk.

Looking for more front axle components? Browse our complete selection of front axle parts to find everything you need in one place.

OEM/ODM Capabilities

At Mettlead, we go beyond simply supplying parts. We understand that different markets have different needs, which is why we offer flexible customization options:

• White-Label Packaging: We can supply this front wheel oil seal with neutral packaging, allowing you to brand it under your own label for resale in your local market.
• Custom Packaging: Need specific packaging designs, labels, or box sizes? Our team accommodates your branding requirements to help you build a professional product line.
• Strict Quality Control: Every oil seal undergoes rigorous inspection before shipment. We check dimensional accuracy, material hardness, lip integrity, and surface finish to ensure each piece meets OE-equivalent standards.
• Bulk Order Support: Whether you need 100 pieces or 10,000, our factory capacity handles orders of all sizes with consistent quality and competitive lead times.

Additionally, we supply a comprehensive range of Sinotruk HOWO truck parts and spare parts, so you can consolidate your sourcing with a single reliable supplier.

Frequently Asked Questions (FAQ)

What does the front wheel oil seal WG9003074387 actually do?

Think of it as a gatekeeper. This oil seal sits inside the front wheel hub and performs two critical jobs simultaneously: it keeps lubricating oil sealed inside the bearing cavity, and it blocks external contaminants like dust, water, and mud from getting in. Without a properly functioning oil seal, your wheel bearings would quickly lose lubrication and suffer accelerated wear.

How do I know if my front wheel oil seal needs replacement?

There are several telltale signs to watch for. Oil stains or grease leaking around the front wheel hub area are the most obvious indicators. You might also notice unusual noise from the front wheels, or during routine inspections, you may find the seal has become hardened, cracked, or deformed. If any of these symptoms appear, it’s time to replace the seal promptly to protect your bearings.

Is this oil seal an exact replacement for the original Sinotruk part?

Yes, absolutely. The dimensions (140mm inner diameter × 160mm outer diameter × 11mm thickness) and the OEM part number WG9003074387 match the original equipment specification precisely. It installs directly into the front wheel hub assembly without any modifications or adapters needed.

What material is this front wheel oil seal made from, and why does it matter?

This seal is manufactured from nitrile rubber (NBR) reinforced with a metal skeleton ring. NBR is the industry-standard material for oil seals because it offers excellent resistance to petroleum-based lubricants, heat, and mechanical wear. The metal ring, meanwhile, provides structural support that prevents the seal from collapsing or distorting under pressure. Together, these materials ensure reliable performance over an extended service life.

Can this oil seal handle extreme temperatures?

It certainly can. The nitrile rubber compound is formulated to remain flexible and effective across a wide temperature range, from -40°C to +120°C. This means it performs reliably whether your trucks operate in freezing winter conditions or scorching summer heat.

How long does this front wheel oil seal typically last?

Under normal operating conditions and with proper installation, this oil seal is designed to last through regular service intervals — typically matching or exceeding the lifespan of the original part. However, factors like road conditions, load weight, and maintenance practices can influence longevity. Regular inspections during scheduled maintenance help catch any issues early.

Get Your Front Wheel Oil Seal WG9003074387 — Request a Quote Today

Ready to secure reliable, factory-direct pricing on the Front Wheel Oil Seal 140x160x11 WG9003074387 for Sinotruk HOWO? Mettlead makes it simple. We offer competitive wholesale pricing, flexible payment options, and fast global shipping to keep your fleet moving.

Why procurement managers choose Mettlead:

• Factory-direct pricing — no middlemen, no markups
• Complete range of Sinotruk, SITRAK, SHACMAN, FAW, Weichai, Dongfeng, and Foton parts
• Fast and reliable worldwide delivery
• Flexible, secure payment methods
• Factory visits welcome for quality verification

Contact us now to get a competitive quote, confirm availability, or discuss bulk order requirements. Our team typically responds within 24 hours with pricing and lead time details.