Drum brakes are still found on the rear axles of millions of vehicles worldwide, and servicing them requires a specific set of tools that most general tool kits don't include. A dedicated drum brake service tool kit makes the job faster, safer, and far less frustrating. This guide walks you through what's in a drum brake kit, how each tool is used, and when to replace your drum brake components.
What Is a Drum Brake Service Tool Kit?
A drum brake service tool kit is a collection of specialized tools designed specifically for removing, installing, and adjusting drum brake components. Unlike disc brakes, drum brakes use a complex assembly of springs, adjusters, and hold-down hardware that requires specific tools to service safely and correctly.
What's Typically Included in a Drum Brake Kit
Spring Pliers (Brake Spring Tool)
Brake springs are under significant tension and can cause serious injury if they slip during removal or installation. Spring pliers are designed with hooked ends that grip the spring coils securely, allowing you to compress and release them in a controlled manner. Never attempt to remove brake springs with standard pliers.
Hold-Down Spring Tool
Hold-down springs secure the brake shoes to the backing plate. The hold-down spring tool has a slotted tip that engages the retaining pin, allowing you to compress and rotate the spring cap for removal and installation.
Brake Adjuster Tool (Spoon)
The star wheel adjuster controls the clearance between the brake shoes and drum. A brake spoon (adjuster tool) is a curved, flat tool that fits through the adjuster slot in the backing plate to rotate the star wheel and set the correct shoe-to-drum clearance.
Pry Bars
Flat pry bars are used to retract brake shoes, remove drums that are stuck due to rust or corrosion, and position components during assembly.
Step-by-Step: Drum Brake Service Procedure
- Safety first: Chock the wheels, engage the parking brake on the opposite axle, and support the vehicle on jack stands.
- Remove the wheel and set it aside.
- Remove the brake drum. If it's stuck, use a rubber mallet to tap around the circumference. If severely stuck, use the drum's threaded puller holes (if present) or a drum puller tool.
- Photograph the assembly before disassembly — drum brake assemblies vary by vehicle and having a reference photo is invaluable.
- Remove the return springs using the spring pliers. Note which spring goes where.
- Remove the hold-down springs using the hold-down spring tool.
- Remove the brake shoes and adjuster assembly.
- Clean the backing plate with brake cleaner and inspect for leaks from the wheel cylinder.
- Install new shoes in reverse order, lubricating the shoe contact points on the backing plate with brake lubricant (not on the friction surface).
- Adjust the star wheel so the drum slides on with slight resistance, then back off 3–5 clicks.
- Reinstall the drum and wheel, torque the lug nuts to spec, and pump the brake pedal to seat the shoes.
When to Replace Drum Brake Components
- Brake shoes: Replace when friction material is less than 1/16" (1.5mm) thick.
- Brake drum: Replace if worn beyond the maximum diameter stamped on the drum, or if deeply scored.
- Wheel cylinder: Replace if leaking or if the piston is seized.
- Springs and hardware: Replace with every brake shoe replacement — springs weaken over time and are inexpensive insurance.
The YISHUN 8-Piece Drum Brake Service Tool Kit
The YISHUN 8-Piece Drum Brake Service Tool Kit available at YATEXAUTO includes spring pliers, hold-down spring tools, adjusters, and pry bars — everything you need to service drum brakes on most passenger vehicles and light trucks. The tools are constructed from hardened steel for durability and feature ergonomic handles for comfortable use during extended jobs.
Conclusion
Drum brake service is a straightforward job when you have the right tools. A quality drum brake service kit pays for itself on the first job by making the work faster and safer. Shop our drum brake service tool kits at YATEXAUTO and get everything you need in one package.