SKF 21098 Wheel Seal Instruction Manual

Introduction

The SKF 21098 Wheel Seal is engineered for reliable sealing performance in automotive applications. This spring-loaded, positive fluid control seal is designed to prevent lubricant leakage and protect wheel bearings from contaminants such as dirt, water, and debris. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance and longevity of your SKF wheel seal.

Product Overview

Image: The SKF 21098 Wheel Seal, featuring its robust metal case and internal rubber sealing element with a garter spring for consistent lip pressure.

The SKF 21098 wheel seal features a durable construction designed to withstand demanding operating conditions. Key components include a high-grade carbon steel case coated with phosphate for rust protection, and a synthetic rubber sealing element formulated for compatibility with modern lubricants and a wide temperature range (-40°F to 400°F). The seal lip profile is designed to meet or exceed original equipment (OE) specifications, ensuring effective exclusion of contaminants and reliable dynamic sealing.

Specifications

Installation (Setup)

Proper installation is crucial for the longevity and performance of the SKF 21098 wheel seal. Always refer to the vehicle manufacturer's service manual for specific procedures and torque specifications.

1. Safety First: Ensure the vehicle is securely supported on jack stands. Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
2. Remove Old Seal: Carefully remove the old wheel seal and inspect the sealing surface for any damage, corrosion, or wear. Clean the area thoroughly.
3. Inspect Components: Examine the wheel bearing, spindle, and housing bore for any imperfections. Address any issues before proceeding.
4. Lubricate: Apply a thin, even coat of clean wheel bearing grease or the recommended lubricant to the seal lip and the shaft sealing surface. This aids in installation and initial operation.
5. Install New Seal: Using a seal driver tool that matches the outer diameter of the seal, carefully and evenly press the new SKF 21098 seal into the housing bore. Ensure the seal is seated squarely and fully to the correct depth. Avoid using hammers directly on the seal without a proper driver, as this can damage the seal or housing.
6. Verify Seating: Confirm that the seal is flush or at the specified depth according to the vehicle's service manual.
7. Reassemble: Reassemble the wheel hub and brake components according to the vehicle manufacturer's instructions, ensuring all fasteners are torqued to specification.

Note: The Bore-Tite coating on the outer diameter of the seal helps fill minor imperfections in the housing bore, providing a tight and leak-proof fit.

Operation

Once installed, the SKF 21098 wheel seal operates continuously to maintain the integrity of the wheel bearing system. Its primary functions include:

• Lubricant Retention: The seal effectively contains the lubricant within the wheel bearing assembly, ensuring proper lubrication and reducing friction and wear.
• Contaminant Exclusion: The robust seal lip design, reinforced by a garter spring, creates a barrier against external contaminants such as dirt, dust, water, and road salt, preventing them from entering the bearing and causing damage.
• Temperature and Chemical Resistance: The Nitrile (NBR) sealing element is formulated to withstand a wide range of operating temperatures and is compatible with various automotive lubricants, including those with aggressive additive packages.

The seal's performance is passive and continuous, requiring no direct user interaction during vehicle operation.

Maintenance

Wheel seals are wear components and do not typically require routine maintenance beyond periodic inspection. However, following these guidelines can help identify potential issues early:

• Regular Inspection: During routine vehicle maintenance (e.g., tire rotations, brake inspections), visually inspect the area around the wheel seals for any signs of lubricant leakage.
• Address Leaks Promptly: If a leak is detected, the seal should be replaced immediately to prevent bearing damage and potential safety hazards.
• Replace During Bearing Service: It is highly recommended to replace wheel seals whenever wheel bearings are serviced or replaced, as seals are often damaged during removal and are critical for bearing protection.
• Avoid Contamination: When working near wheel seals, ensure the area is clean to prevent dirt or debris from compromising the seal's integrity.

Troubleshooting

Most issues related to wheel seals manifest as lubricant leaks. If you observe any of the following, inspect the seal and surrounding components:

• Visible Lubricant Leakage: Grease or oil stains on the wheel, tire, brake components, or inner fender well indicate a seal failure.
• Bearing Noise: A humming, grinding, or roaring noise from the wheel area, especially when turning, can indicate a damaged or improperly lubricated wheel bearing, often caused by a failed seal allowing contaminants in or lubricant out.
• Brake Contamination: Lubricant leaking onto brake pads or shoes can reduce braking effectiveness and cause pulling or uneven braking.

Possible Causes of Seal Failure:

• Improper installation (e.g., seal not seated squarely, damaged during installation).
• Damage to the shaft sealing surface (e.g., nicks, grooves, corrosion).
• Excessive bearing play or wear.
• Overheating of the wheel assembly.
• Exposure to extreme environmental conditions or harsh chemicals.
• Normal wear and tear over time.

If a seal failure is suspected, it is recommended to replace the seal and inspect the wheel bearing for damage.

Compatibility

The SKF 21098 Wheel Seal is compatible with various International Harvester (IHC) Light Pickup and Travelall models, including:

• IHC Light Pickup
• IHC Travelall
• M.H.C.
• A100, A110, A120, A130, A140, A150
• B100, B110, B120, B130, B140, B150
• C100, C110

Always verify fitment with your specific vehicle's make, model, and year using the provided specifications and cross-referencing with your vehicle's service manual or parts catalog.

Safety Information

• Always use appropriate safety equipment, including eye protection and gloves, when working on vehicles.
• Ensure the vehicle is properly supported and stable before beginning any work.
• Follow all vehicle manufacturer's instructions and safety warnings.
• Dispose of old parts and lubricants responsibly according to local regulations.

Warranty Information

Specific warranty details for the SKF 21098 Wheel Seal are typically provided at the point of purchase or can be found on the official SKF website. Please retain your proof of purchase for any warranty claims.

Support

For further technical assistance, product information, or support, please visit the official SKF website or contact their customer service department. You can often find detailed product catalogs and technical documents on their site.

SKF Official Website: www.skf.com