Genuine Sinotruk Oil Seal (Both Side Lip Type) 90-115-13 – Ultimate Leak Protection & Unmatched Driveline Durability for Howo Heavy-Duty Trucks

Engineering Excellence Behind the 90-115-13 Dual‑Lip Oil Seal

The 90-115-13 oil seal is not a simple rubber ring – it is a precision‑engineered sealing solution that plays a vital role in the longevity and reliability of your vehicle’s drivetrain. Its dual‑lip design features a primary sealing lip that wipes the shaft surface clean of oil, and a secondary lip that acts as a dust excluder, preventing external contaminants from reaching the primary seal. This configuration is particularly effective in harsh environments, where abrasive dust and water can quickly degrade a single‑lip seal.

The sealing lip is moulded from a specially compounded nitrile rubber (NBR) that offers excellent resistance to petroleum‑based lubricants, high temperatures, and ozone. The lip profile is optimised to maintain a precise interference fit with the shaft, creating a hydrodynamic oil film that reduces friction and wear while ensuring zero leakage. The integral metal case is coated with a corrosion‑resistant finish, and the outer diameter is designed for a press‑fit that eliminates the need for additional sealants.

In typical Howo truck applications, the 90-115-13 seal is used in axle hubs, transmission output shafts, and differential pinion shafts – locations where reliable oil retention is critical for component life. Its 90mm inner diameter, 115mm outer diameter, and 13mm thickness are standard for many heavy‑duty applications, making it a versatile and dependable replacement part. Regular inspection of oil seals for signs of leakage, hardening, or cracking, and prompt replacement with genuine Sinotruk 90-115-13 units, is essential for preventing costly fluid loss and drivetrain damage.

Technical Specifications – Oil Seal (Both Side Lip Type) 90-115-13

Parameter	Specification
OEM Part Number	90-115-13
Product Name	Oil Seal (Both Side Lip Type)
Brand	Sinotruk (Genuine OEM)
Inner Diameter (ID)	90 mm
Outer Diameter (OD)	115 mm
Thickness	13 mm
Material	Nitrile rubber (NBR) with metal casing
Hardness (Shore A)	70 ± 5
Temperature Range	-40°C to +120°C
Lip Type	Dual (primary + excluder)
Spring Material	Stainless steel garter spring
Application	Axle, transmission, differential shafts
Compatible Models	Howo A7, T7, C7H, HW series; Sinotruk heavy‑duty trucks

Why the Genuine Sinotruk 90-115-13 Outperforms Generic Oil Seals

Generic oil seals often use inferior rubber compounds that harden, crack, or swell when exposed to hot oil, leading to premature leakage and component failure. The 90-115-13 is formulated with a high‑grade NBR compound that maintains its elasticity and sealing force even after thousands of heat cycles. Its dual‑lip design provides an extra layer of protection against contamination, significantly extending the service life of the seal and the components it protects.

Moreover, the precise dimensional accuracy of the genuine Sinotruk seal ensures a perfect fit in the housing bore, eliminating the risk of leakage paths that can occur with poorly manufactured aftermarket seals. The stainless steel garter spring provides consistent lip loading, compensating for minor shaft wear and ensuring a tight seal throughout the life of the component. By choosing the Sinotruk 90-115-13, you protect your drivetrain investment and minimise the risk of unplanned downtime.

Advanced Material Science for Long‑Term Durability

The NBR compound used in the 90-115-13 is specially formulated to resist the aggressive additives found in modern gear oils and differential fluids. Its low‑temperature flexibility ensures that the seal maintains its sealing function even during cold starts, while its high‑temperature stability prevents hardening and cracking that can lead to oil leaks. The metal case is zinc‑plated to resist corrosion, ensuring that the seal remains securely seated in the housing bore even in humid environments.

Compatibility and Fitment

The 90-115-13 is a direct replacement for the original oil seal in a wide range of Sinotruk and Howo models. Its dimensions (90mm ID, 115mm OD, 13mm thickness) match the factory specifications exactly, ensuring a straightforward installation. Always verify the seal’s orientation and use a suitable installation tool to prevent damage to the sealing lip during assembly.

Explore the full range of genuine Howo Parts available for your fleet, including seals, bearings, and driveline components. The 90-115-13 oil seal is an essential part of that ecosystem – and with Sinotruk’s original quality, you can be confident that your drivetrain will remain leak‑free and reliable.

Installation Best Practices for the 90-115-13

Proper installation of the 90-115-13 oil seal is critical for achieving optimum sealing performance. Begin by thoroughly cleaning the shaft and housing bore, removing any burrs, dirt, or old sealant. Apply a thin film of clean oil to the sealing lip to reduce friction during installation. Using a suitable seal driver or a press, carefully install the seal into the bore, ensuring that it is seated squarely and evenly. Avoid cocking the seal, as this can damage the lip and cause leakage.

During routine maintenance, inspect the 90-115-13 seal for signs of leakage, hardening, or cracking. If any leakage is detected, replace the seal immediately with a new genuine unit to prevent fluid loss and potential damage to bearings and gears.

Built for Nigeria – Unyielding Sealing Performance in Harsh Environments

Nigeria’s hot, dusty, and often wet conditions place extreme demands on drivetrain seals. The 90-115-13 is engineered to thrive in these environments, with a dual‑lip design that keeps abrasive dust and water out, while retaining vital lubricants. Its robust NBR construction resists the thermal degradation and chemical attack that can cause premature failure in lesser seals, ensuring that your truck’s axles and transmissions remain protected.

Furthermore, the genuine Sinotruk seal reduces the risk of oil leaks that can lead to environmental contamination, safety hazards, and costly repairs. By choosing the Sinotruk 90-115-13, fleet operators can improve vehicle uptime, reduce maintenance costs, and demonstrate a commitment to sustainability and operational excellence.

Protect Your Drivetrain with the Genuine 90-115-13 Oil Seal

The 90-115-13 Oil Seal (Both Side Lip Type) is a small but vital component that ensures the integrity and reliability of your Howo or Sinotruk truck’s drivetrain. Its superior material, dual‑lip design, and exact OEM fitment make it the definitive choice for professional workshops and fleet operators. Every time you install a genuine Sinotruk 90-115-13, you are safeguarding your investment, reducing downtime, and extending the life of your drivetrain components.

Don’t compromise with generic seals that may not provide the same level of protection or durability. Insist on the genuine 90-115-13 – the oil seal trusted by experienced mechanics and fleet operators across Nigeria. With its proven performance in the most demanding conditions, this seal delivers the reliability and peace of mind you deserve.

Genuine Sinotruk 90-115-13 – Engineered for excellence. Built for Africa. Trusted by professionals.

Packaging & Shipping

Every Howo part is carefully packaged and shipped to ensure it arrives in perfect condition, ready for installation. Our professional logistics process guarantees timely delivery across Nigeria.

Secure Packaging

Each Howo part is individually wrapped in protective materials and placed in reinforced cardboard boxes to prevent damage during transit.

Dedicated Transport

We use our own Sinotruk logistics fleet for reliable delivery, ensuring parts reach customers quickly and safely across all regions of Nigeria.

Quality Inspection

Before shipping, each part undergoes final quality checks and is clearly labeled with its OEM number for easy identification.

Nationwide Distribution

Our extensive distribution network covers all major cities and rural areas in Nigeria, ensuring prompt delivery to construction sites, workshops, and businesses.

Shipping Information for Nigerian Customers

• Standard Delivery: 3-5 business days to major cities (Lagos, Abuja, Port Harcourt, Kano)

• Express Delivery: 1-2 business days available for urgent orders

• Regional Coverage: We deliver to all 36 states including remote areas

• Tracking: All shipments include real-time tracking information

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