Timken 515021 Wheel Bearing and Hub Assembly - Front

Timken 515021 Front Hub Assembly

Timken 515021 is a front wheel bearing and hub assembly built for heavy-duty Ford truck applications. It is engineered for the 1999-2001 Ford F-250 Super Duty and Ford F-350 Super Duty front axle positions listed below, with design details focused on stable wheel support, reduced noise, and consistent ABS wheel-speed signal performance.

Key Features

• Front wheel bearing and hub assembly for driven applications
• 55-spline design with 8 wheel studs and 4 flange bolt holes
• Low runout construction to reduce noise and vibration
• Premium seals with reinforced outer case and contamination exclusion features
• Precision bearing profiles and enhanced surface finishes for load capacity and bearing life
• 100% tested ABS sensor for wheel-speed monitoring
• Cross-reference: SKF BR930424 for the same application

Detailed Description

Timken 515021 is a driveline and axle hub assembly designed around OE-developed testing, materials, and manufacturing controls. The hub uses premium bearings with uniform internal geometry and refined surface finishes to support load carrying capacity and help maintain efficient operation. Its seal design includes a reinforced outer case, ribbed rubber inner diameter, internal contamination exclusion system, and vent holes to help protect the seal during installation and maintain sealing performance over time. This part is a direct-fit front hub assembly for 1999-2001 Ford F-250 Super Duty and Ford F-350 Super Duty models in the configurations shown, making it a practical choice when replacing a worn front wheel bearing and hub assembly on a Ford Super Duty truck. Part number 515021 is also referenced by MOOG Hub Assemblies 515021 and SKF BR930424.

Vehicle Fitment

• Fits 2000-2001 Ford F-250 Super Duty, front
• Fits 2000-2001 Ford F-350 Super Duty, front, single rear wheels
• Fits 1999 Ford F-250 Super Duty, front, from 03/22/1999
• Fits 1999 Ford F-350 Super Duty, front, single rear wheels, from 3/22/1999

Common Replacement Reasons

• Front wheel bearing noise or growling
• Excess wheel play or looseness at the hub
• ABS warning light caused by wheel-speed sensor issues
• Brake vibration or inconsistent braking feel from hub runout
• Seal wear that allows contamination into the hub assembly

Installation Notes

Verify the vehicle’s year, model, front position, and rear-wheel configuration before installation. Confirm spline count, bolt circle diameter, flange dimensions, and pilot diameters against the original hub assembly to ensure proper fitment on the Ford F-250 Super Duty or Ford F-350 Super Duty. Clean the mounting surfaces thoroughly and inspect related suspension and brake components for wear before completing the repair.

Quality Assurance

Timken manufactures hub bearing assemblies using OE-developed testing and controlled design, material, and process standards. The ABS sensor is 100% tested to monitor wheel speed for anti-lock braking system operation, and the bearing and seal design is built to support consistent performance in demanding truck service.