Raybestos 66785 Disc Brake Rotor and Hub Assembly - Front

Overview of Raybestos 66785 Disc Brake Rotor and Hub Assembly

The Raybestos Specialty - Truck Disc Brake Rotor and Hub Assembly (Part Number 66785) is engineered for heavy-duty performance on Ford trucks. Designed specifically for Ford Excursion, F-250 Super Duty, and F-350 Super Duty models, this assembly ensures reliable braking and hub function under demanding conditions.

• Compatible with Ford Excursion, F-250 Super Duty, and F-350 Super Duty
• Includes disc brake rotor and hub assembly for integrated performance
• Mounting bolt hole quantity: 8 with 170 mm bolt circle diameter
• Nominal rotor thickness: 1.496 inches (38.000 mm)
• Discard rotor thickness: 1.417 inches (36.000 mm)
• Mounting bolt hole diameter: 0.603 inches (15.300 mm)
• Stud/lug hole quantity: 8 for secure wheel attachment

Detailed Product Specifications

This disc brake rotor and hub assembly features a nominal thickness of 1.496 inches (38.000 mm), providing a solid braking surface for consistent stopping power. The discard thickness is set at 1.417 inches (36.000 mm), indicating the minimum safe thickness before replacement is necessary. The assembly includes eight mounting bolt holes arranged on a 170 mm (6.693 inch) bolt circle diameter, ensuring precise fitment and secure installation. The mounting bolt hole diameter measures 0.603 inches (15.300 mm), compatible with the lug hardware on specified Ford truck models. With eight stud/lug holes, this assembly supports heavy-duty wheel configurations typical of Ford Excursion and Super Duty trucks.

About the Raybestos Specialty - Truck Product Line

The Specialty - Truck line by Raybestos is tailored for truck applications requiring durable and reliable brake components. This product line focuses on assemblies that meet the rigorous demands of heavy-duty trucks, combining rotor and hub components to simplify installation and maintain factory specifications. The 66785 assembly is part of this line, designed to provide consistent performance and fitment for Ford’s larger truck models.

Common Applications and Problem Solving

• Replacement for worn or warped disc brake rotors on Ford Excursion and Super Duty trucks
• Addresses issues with hub assembly wear affecting wheel alignment and stability
• Solves brake pulsation caused by rotor thickness below discard limits
• Restores proper mounting bolt alignment and secure wheel attachment
• Improves braking performance and safety on heavy-duty Ford trucks

Installation Notes and Tips

Ensure the mounting surfaces are clean and free of debris before installation. Verify the bolt hole pattern matches the vehicle’s hub assembly. Use a calibrated torque wrench to tighten mounting bolts to manufacturer specifications. Check rotor thickness with a micrometer to confirm it meets nominal thickness before installation. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

Raybestos Specialty - Truck assemblies are manufactured to meet or exceed OEM standards for durability and fitment. The 66785 disc brake rotor and hub assembly undergoes rigorous quality control to ensure consistent performance. Warranty coverage details should be confirmed with the product documentation or supplier, as it may vary by application and region.