What Causes Disc Brake Lock-Up Without Rebound?
2 Answers
The reason for disc brake lock-up without rebound is: water ingress in the brake fluid, causing the caliper piston to rust, and replacing the caliper can resolve the issue. Disc brakes consist of a brake disc connected to the wheel and a brake caliper at the edge of the disc. During braking, high-pressure brake fluid pushes the brake pads to clamp the brake disc, thereby generating the braking effect. Motorcycles are composed of five main parts: the engine, transmission system, running gear, braking system, and electrical instrumentation. They are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring bikes. Road motorcycles can be divided into three major categories: supersport motorcycles, touring motorcycles, and American-style motorcycles.
I've been driving for over ten years and have encountered brake seizure twice. Last time after driving in the rain, the left front wheel completely locked up, leaving black skid marks all the way. Inspection revealed the caliper guide pins were rusted solid, with sludge and rust completely blocking the sliding channels. Another time after brake modification, the retraction was poor - careful examination showed the brake pads were installed too tightly, rubbing against the caliper bracket edges. This condition significantly increases fuel consumption, with tire temperatures rising to burning hot levels. If left unaddressed long-term, it can even groove the brake discs. My advice: don't push it - immediately visit a repair shop to disassemble the caliper, clean the guide pins and apply special lubricant. If necessary, even the brake lines may need replacement.