Here's a general outline of the process. This is not a complete guide, and variations exist depending on the year and model. Always refer to your specific repair manual.
Tools and Materials You'll Likely Need:
* Jack and jack stands: Safely supporting the truck is paramount.
* Wheel chocks: For added safety.
* Lug wrench: To remove the wheels.
* Impact wrench (highly recommended): Makes removing axle nuts much easier.
* Socket set: Various sizes will be needed.
* Wheel bearing puller: To remove the bearings.
* Bearing race and seal installer: To install the new seals and races without damage.
* Hammer and punches (brass is preferred): For carefully tapping components.
* Torque wrench: Crucial for proper tightening.
* New wheel bearing seals: Get the correct ones for your axle.
* New wheel bearings (possibly): Inspect them carefully – often replacing them with the seals is recommended to prevent future problems.
* Penetrating oil: To help loosen stubborn bolts.
* Grease: Appropriate for your wheel bearings.
* Clean rags and shop towels: For cleaning.
* Safety glasses and gloves: Essential for protecting yourself.
General Steps (Consult your repair manual for precise details):
1. Safety First: Securely jack up the truck and use jack stands. Chock the wheels. Disconnect the negative battery terminal.
2. Remove the Wheel and Brake Assembly: Remove the wheel, brake caliper (support it with a bungee cord or wire to avoid stressing the brake line), rotor, and possibly the backing plate depending on your model.
3. Remove the Axle Nut: This will likely require an impact wrench. This nut is extremely tight.
4. Remove the Axle Flange: This may require specialized tools and techniques depending on your axle type (Dana, etc.). This step often involves removing cotter pins and using a puller.
5. Remove the Wheel Bearing and Races: Carefully remove the old bearings and races using the appropriate puller. Be mindful of the order of components.
6. Inspect the Bearings and Axle: Carefully inspect the bearings and axle shafts for damage. If damaged, replace the bearings.
7. Clean the Axle Housing: Thoroughly clean the axle housing to remove any debris or old grease.
8. Install New Seals and Races: Carefully install the new races and seals using the appropriate installer tool. Avoid damaging the seals during installation.
9. Install New Bearings (if necessary): Pack the new bearings with grease.
10. Reassemble: Reassemble the axle flange, axle nut, rotor, caliper, and wheel in the reverse order of disassembly.
11. Torque Specifications: Use a torque wrench to tighten all components to the manufacturer's specifications found in your repair manual. This is critical.
12. Test Drive: Carefully test drive the vehicle after the repair. Listen for any unusual noises.
Important Considerations:
* Axle type: F-350 dually axles can vary significantly depending on the year and configuration. Knowing the specific axle type is essential for proper repair.
* Torque Specifications: Incorrect torque can lead to premature bearing failure or damage to the axle. Always consult your repair manual.
* Bearing preload: Proper bearing preload is crucial for proper operation. This usually involves using a dial indicator and following the instructions in your repair manual.
Again, this is a simplified overview. Attempting this repair without the proper knowledge, tools, and repair manual is strongly discouraged. If you're not comfortable with this level of automotive repair, take your truck to a qualified mechanic. The cost of a professional repair is far less than the potential damage caused by a mistake.
