What Causes Brake Drum Overheating?
2 Answers
Brake drum overheating causes: 1. Damaged drum spring; 2. Other malfunctions preventing brake shoes from retracting; 3. Improper brake adjustment causing dragging and overheating. The brake drum is a cast iron component shaped like a tambourine, fixed to and rotating with the tire at the same speed. During braking, hydraulic pressure pushes the brake shoes against the inner edge of the drum, using friction to slow tire rotation and achieve braking. Drum brakes consist of a brake backing plate, wheel cylinder, brake shoes, related linkages, springs, pins, and the brake drum. With lower manufacturing costs and higher absolute braking force, drum brakes are commonly used on rear wheels of compact cars.
It's quite common for brake drums to heat up after long drives, thanks to my over ten years of driving experience. The most common reason is that the brake pads are worn too thin, generating heat quickly but dissipating poorly during friction, and frequent braking on downhill slopes exacerbates the issue. Other factors like insufficient brake fluid, system leaks, or improper shoe installation can also intensify heat buildup. If the wheel feels scalding to the touch or there's a burning smell, be highly alert—it could lead to reduced braking performance or even failure. I usually recommend stopping immediately to let it cool, doing a quick check on pad thickness; if they're thin, don't hesitate—head to a professional repair shop for a thorough inspection. Cultivate good habits like avoiding sudden braking and getting maintenance every six months to prevent most troubles. Remember, safety always comes first—don't let minor issues turn into major disasters.
