What is the adjustment method for block brakes?
3 Answers
Loosen the screws on both sides; push the screws into position without tightening them. Tighten both sides inward, then release the brake to check and fix the gap.
Adjusting drum brakes is no trivial matter—it took me several attempts to get the hang of it. Before starting, ensure the car is parked on level ground with the handbrake fully engaged and the engine off—safety first. Then, jack up the vehicle, remove the wheel to expose the brake assembly, and locate the adjustment hole—usually on the side or back. Use a wrench to loosen the locknut, but avoid excessive force to prevent stripping. Next, insert a screwdriver and turn the star wheel clockwise or counterclockwise until you feel slight resistance when manually rotating the hub, indicating proper clearance (ideally 2–3mm). Tighten the nut, reinstall the wheel, lower the car, and test the brake pedal for normal travel and absence of unusual noises. Essential tools include a 10mm wrench and screwdriver—don’t cut corners. Beginners risk over-adjusting, leading to dangerous brake failure. During routine maintenance, check the wear on the brake shoes; replace them if they’re too thin to avoid emergencies. Patience is key—proper adjustment ensures responsive braking and accident prevention.
Before adjusting the drum brakes, I always think about safety. After pulling the handbrake to stop and stabilize, lift the car properly—don’t cut corners by using a proper jack. Locate the adjustment hole on the brake housing and loosen the nut; don’t mix up the tools—usually, a star wrench will do. When turning the star wheel, don’t go too fast: tighten it slightly by turning inward, or loosen it a bit counterclockwise. Manually spin the wheel to feel slight friction—too much gap means weak braking, while too little may cause lockup and overheating. After testing, drive a short distance to check braking performance and listen for any noise, ensuring the pedal feels normal in terms of firmness. Details like frequent rain causing water seepage and rust can make gap adjustment more laborious—it’s best to clean and lubricate the wheel axle in advance to prevent sticking. Personally, I recommend checking every six months, especially for older cars with faster wear. If braking distance increases, address it promptly to avoid dangerous emergency brake failures on the road—that’s life-threatening.
