Here's a general outline of the process:
1. Preparation:
* Safety First: Securely jack up the truck and support it with jack stands. Chock the wheels on the ground.
* Gather Tools: You'll need a socket set (including deep sockets), a wrench set, a hammer, a punch, possibly a slide hammer, a breaker bar, penetrating oil (like PB Blaster), and potentially a hub puller (specific to your axle). A wheel bearing packer is also helpful for reassembly.
* Remove the Wheel: Remove the wheel and tire assembly.
* Remove the Brake Drum: This typically involves removing the retaining clips or nuts on the drum and gently tapping the drum off the hub. If it's stuck, use a drum puller or carefully apply penetrating oil and tap around the circumference.
2. Removing the Hub:
* Locate the Axle Flange Nuts: These are typically large nuts on the axle flange (the part the wheel studs screw into).
* Remove the Axle Flange Nuts: Use a breaker bar and appropriate socket. These nuts can be very tight due to corrosion and years of use; penetrating oil is highly recommended and may require several applications.
* Remove the Axle Flange: Once the nuts are removed, the flange should come off relatively easily. If it's stuck, tap gently with a hammer and punch around the circumference.
* Inspect the Wheel Bearings and Seals: Carefully inspect the wheel bearings and seals for damage. These are likely to need replacement, especially if you are this far into the job.
* Remove the Hub: This is where the difficulty lies. Some hubs can be pulled off with a slide hammer or a simple puller, while others might require a specialized hub puller (available from auto parts stores). Consult your repair manual or a mechanic. The process will vary depending on the design. The hub may be pressed onto the axle shaft.
* Remove the Wheel Bearings: Once the hub is off, the wheel bearings should be removed. These are usually tapered roller bearings and require a bearing race and seal puller.
3. Reassembly:
* Clean and Inspect: Thoroughly clean all parts, inspect for wear and tear, and replace any damaged components (bearings, seals, etc.).
* Reassemble: Reassembly is the reverse of disassembly. Be sure to pack the wheel bearings with fresh grease using a bearing packer. The correct amount and type of grease is crucial for bearing longevity.
* Torque Specifications: Tighten all nuts and bolts to the manufacturer's specified torque settings. This information is crucial and can be found in your repair manual. Incorrect torque can lead to premature wear or failure.
Important Considerations:
* Repair Manual: A repair manual specific to your 1973 Dodge 1-ton truck is essential. It will provide detailed instructions, torque specifications, and diagrams specific to your vehicle's axle.
* Wheel Bearings: Replacing the wheel bearings is strongly recommended while you have the hub off. They are critical for safe operation and replacing them with new ones prevents future problems.
* Professional Help: If you're not comfortable performing this task yourself, take your truck to a qualified mechanic. Improperly removing or reinstalling the hub can lead to serious damage.
This process is complex, and this information is a general guide only. Always refer to your repair manual for the correct procedure and torque specifications for your specific vehicle. Improperly performing this repair can be dangerous. If you are not confident in your abilities, seek professional help.
