How to Determine When to Replace Brake Drums?
3 Answers
Methods to determine when brake drums need replacement are: 1. Observe if the thickness of the brake drum is only one-third of the original; 2. Notice any abnormal noises when lightly applying the brakes; 3. Experience delayed brake response and weakened braking force. Brake drums consist of rotating parts, fixed parts, actuating parts, and positioning adjustment devices. The method for replacing brake drums is: 1. Lift the car and remove the tire; 2. Unscrew the fixing screws on the brake wheel cylinder and remove the brake wheel cylinder; 3. Remove the old brake drum and push back the brake wheel cylinder piston; 4. Clean the installation bracket of the brake disc and install the new brake drum.
I remember last year when I was driving down a slope, the steering wheel shook violently when I braked, making me feel dizzy. After stopping to check, I removed the wheels and saw deep grooves worn into the surface of the brake drum, with fine cracks along the edges. That's when I realized the ignored warning signs—the screeching noise every time I hit the brakes was terrifying. I immediately went to the garage and had the parts replaced. Since then, I've made it a habit to inspect the drum condition every 10,000 kilometers or so: checking for abnormal noises, longer pedal travel, or excessive wheel hub heat. During regular maintenance, I also remind the mechanic to measure the thickness—if it's too thin, replace it. Safety comes first—don't wait until an accident happens to regret it. Especially before long trips, always double-check to avoid breaking down halfway.
As someone who frequently drives on highways, I'm particularly concerned about brake issues. The signs indicating it's time to replace brake drums are quite obvious: First, if you feel the wheels shaking or vibrating when braking, almost like they're dancing, that's a clear signal. Second, listen for any sharp metallic scraping sounds – you'll notice them if you pay attention while driving. Once these symptoms appear, immediately find a flat area to stop, then manually check if the wheel hub feels excessively hot to the touch. If it's unusually hot, you should be alarmed. During my last visit to the 4S shop, the technician used calipers to measure the thickness and said replacement is mandatory when it's 2mm below the standard value. You can also visually inspect the drum surface for wear – never delay if you see deep grooves or cracks. Regular inspections are crucial; get maintenance every six months. When replacing, it's safer to renew the brake pads at the same time to avoid doubling your subsequent repair costs. Driving safety is no trivial matter – it's something you can't afford to neglect.