Timken HA590086 Wheel Bearing and Hub Assembly - Front

Timken HA590086 Wheel Bearing and Hub Assembly Overview

The Timken HA590086 wheel bearing and hub assembly is engineered for reliable driveline performance on select Chevrolet, Pontiac, and Saturn vehicles. Designed to meet precise specifications, this assembly ensures proper fit and function for models including the Chevrolet Cobalt, Pontiac G5, Saturn Ion, and Chevrolet HHR.

• 33 spline quantity for secure axle engagement
• 5 wheel studs for stable wheel mounting
• 3 flange bolt holes for precise attachment
• Wheel pilot diameter of 2.558 inches (64.97 mm) for accurate wheel alignment
• Brake pilot diameter of 2.577 inches (65.45 mm) to support brake component fitment
• Hub pilot diameter of 3.346 inches (85.00 mm) ensuring proper hub centering
• Flange diameter of 5.394 inches (137.00 mm) with a flange offset of 1.533 inches (38.95 mm)
• Driven type assembly designed for direct axle connection
• Bolt circle diameter of 4.331 inches (110.00 mm) matching OEM specifications

Technical Details and Compatibility

The Timken HA590086 wheel bearing and hub assembly is manufactured to meet the exacting standards required for Chevrolet Cobalt, Pontiac G5, Saturn Ion, and Chevrolet HHR vehicles. The 33 spline count ensures compatibility with the driven axle shafts of these models, while the 5 wheel studs and 3 flange bolt holes provide a secure and stable mounting platform. The precise wheel pilot and brake pilot diameters facilitate proper wheel and brake rotor alignment, reducing vibration and wear. The flange offset and diameter are designed to maintain correct wheel positioning relative to the suspension and brake components.

Common Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing and hub assemblies on Chevrolet Cobalt, Pontiac G5, Saturn Ion, and Chevrolet HHR
• Eliminates wheel vibration caused by bearing wear or hub damage
• Resolves noise issues such as humming or grinding from the wheel area
• Restores proper wheel alignment and brake rotor positioning
• Addresses looseness or play in the wheel hub assembly

Installation Notes and Tips

Installation of the Timken HA590086 wheel bearing and hub assembly requires proper tools and adherence to vehicle-specific torque specifications. Ensure the axle splines align correctly with the 33 spline hub interface. Verify that the 5 wheel studs and 3 flange bolt holes match the vehicle’s wheel and suspension mounting points. Clean the hub mounting surface before installation to prevent misalignment. It is recommended to inspect related components such as wheel bearings, seals, and brake rotors during replacement.

Quality Assurance and Warranty

Timken manufactures the HA590086 wheel bearing and hub assembly to meet or exceed OEM standards for durability and performance. Each unit undergoes rigorous quality control to ensure precise fit and long service life. Timken typically offers a limited warranty covering defects in materials and workmanship; please refer to Timken’s official warranty documentation for specific terms and conditions.