That being said, here's a general overview of the process. This is not a complete, step-by-step guide, and variations may exist depending on specific axle configuration. Consult a repair manual specific to your 1985 Chevrolet dually's axle type (e.g., GM 10-bolt, 12-bolt, etc.) for detailed instructions and torque specifications.
Tools You'll Likely Need:
* Wheel Hub Removal Tool: This is crucial and specifically designed to press the hub off the axle. A standard slide hammer won't suffice in most cases.
* Socket Set & Wrenches: Various sizes for lug nuts, axle nuts, and other fasteners.
* Impact Wrench (Recommended): Makes removing the axle nut significantly easier.
* Bearing Separator: For removing the wheel bearings.
* Large Pry Bar (Potentially): May be needed to help break the hub loose.
* Torque Wrench: Essential for proper reassembly and preventing damage.
* Jack & Jack Stands: To safely lift and support the truck.
* Wheel Chocks: For safety.
* Penetrating Oil (PB Blaster, etc.): To loosen rusted or seized fasteners.
* Shop Rags/Cleaners: To keep things tidy and prevent contamination.
* Repair Manual: Absolutely necessary for your specific truck model and axle.
General Steps (Again, this is a simplified overview and may not apply to your exact situation):
1. Safety First: Chock the front wheels, engage the parking brake, and securely support the vehicle on jack stands. Remove the wheel.
2. Remove the Axle Nut: This is usually a very large nut. Use an impact wrench if possible. Penetrating oil may be helpful beforehand.
3. Remove the Wheel Hub Retaining Nut (if applicable): Some designs have a separate retaining nut behind the axle nut.
4. Remove the Brake Drum or Rotor: Depending on your brake system.
5. Remove the Wheel Bearing/Hub Assembly: This is where the hub removal tool becomes essential. It presses the hub off the axle. This step can be tricky and requires care to avoid damaging the axle or bearings.
6. Remove the Wheel Bearings: Use a bearing separator to carefully remove the bearings from the hub assembly.
7. Clean and Inspect: Thoroughly clean all components before reassembly. Inspect the bearings, seals, and axle for wear or damage.
Important Considerations:
* Axle Type: The procedure varies significantly depending on the type of axle in your truck. You *must* know your axle type before attempting this.
* Bearing Preload: Proper bearing preload is critical. Incorrect preload can lead to premature bearing failure. A repair manual will explain how to set this properly.
* Seals: Replace seals as needed during reassembly to prevent leaks.
* Torque Specifications: Follow the torque specifications in your repair manual precisely to prevent damage.
Again, this is a simplified overview and should not be considered a complete guide. Consult a repair manual specific to your 1985 Chevrolet dually for detailed instructions and torque specifications. If you're unsure about any step, it's best to seek professional help from a qualified mechanic. This job involves potentially serious consequences if done incorrectly.
