How to Use Drum Brake Tools
Drum brakes are a common component of many vehicles, especially in older models and certain applications like rear braking systems. Unlike disc brakes, which use a caliper to squeeze brake pads against a rotor, drum brakes function by expanding friction shoes against the inside of a cylindrical drum. This mechanism requires special tools to service, maintain, and replace the components effectively. In this article, we will discuss the essential drum brake tools and how to use them properly to ensure your braking system operates efficiently.
Essential Tools for Drum Brake Maintenance
1. Brake Tool Kit Most professional and DIY mechanics will benefit from having a comprehensive brake tool kit. This typically includes various tools such as a brake spring tool, wheel cylinder puller, and a shoe adjusting tool.
2. Brake Spring Tool This tool is used to remove and install the brake springs, which hold the shoes in place. Using your fingers to do this can be dangerous due to the tension in the springs, so a dedicated spring tool is crucial for safety.
3. Brake Shoe Adjusting Tool This tool helps in adjusting the brake shoe's position for proper clearance against the drum. It typically resembles a long screwdriver with a hooked end, allowing you to engage the adjustment mechanism easily.
4. Drum Brake Spacer Often, you will need to space the brake shoes correctly, so having a drum brake spacer can help you set the shoes at the right distance from the drum for optimal braking performance.
5. Torque Wrench For correctly installing the drum and other components, a torque wrench ensures that all fasteners are tightened to the manufacturer’s specifications, enhancing safety during operation.
Steps to Use Drum Brake Tools
1. Preparation
Before beginning the brake service, ensure you have the right tools and a clean workspace. Raise the vehicle with a jack and secure it on jack stands. Remove the wheel to access the drum brake assembly.
Using your hand or a mallet, carefully tap the drum to loosen it. Sometimes, the drum may be stuck due to rust or corrosion; if necessary, a drum puller can be used to gently pry it off without damaging the braking components.
3. Using the Brake Spring Tool
Once the drum is removed, locate the springs holding the brake shoes in place. Using the brake spring tool, carefully remove these springs. It’s important to ensure your fingers are clear of any potential snap-back from the springs, as they can be under significant tension.
4. Adjusting Brake Shoes
Using the brake shoe adjusting tool, rotate the adjustment wheel or star wheel found at the base of the brake shoes. This adjusts the shoes' position so they sit correctly against the drum when reinstalled. Make small adjustments, checking the spacing regularly until you achieve the desired distance.
5. Installing New Shoes (if necessary)
If you’re replacing worn brake shoes, now is the time to install the new components. Ensure they are positioned correctly, aligning with the hold-down springs and adjusters. Use the brake spring tool to carefully reattach the springs, ensuring everything is secure.
6. Reinstall the Brake Drum
Before replacing the drum, inspect it for any signs of damage or excessive wear. If it's in good condition, install it back onto the hub. Make sure it’s seated properly and spins freely.
7. Final Adjustments
With the drum in place, make any final adjustments to the brake shoes to ensure clearance is appropriate. Reinstall the wheel and lower the vehicle. Finally, pump the brake pedal a few times to ensure everything is properly seated and functioning.
Conclusion
Using drum brake tools correctly is vital to the safety and efficiency of your vehicle's braking system. Regular maintenance not only enhances performance but also extends the life of your brakes. With the right tools and a bit of knowledge, servicing drum brakes can be a straightforward task, allowing you to keep your vehicle in top shape. Always remember to follow safety protocols and consult your vehicle's manual for specific instructions related to your model.