Causes and solutions for car brake lockup
(Baonghean.vn) - Brakes are a system that is prone to problems, of which brake lock is one of the difficult problems, especially when moving on the road. The cause sometimes comes from the car owner not knowing how to use and maintain it properly. Knowing and understanding the causes of brake lock is extremely necessary for drivers.
There are many causes of brake lockup, below are typical cases.
1. Excessive brake pad wear, plus the brake disc is worn or polished many times, making the brake disc thinner than the standard thickness. When braking, the brake piston is pushed out beyond the limit of travel, causing the piston or peach to not be able to return, but to press tightly against the brake drum or brake disc, causing the brake to lock.
When encountering this situation, the driver can temporarily handle it by removing the wheel, and also removing the brake drum (with drum brakes), then using a screwdriver to push the piston back to its original position and then taking the car to the garage for handling.
 |
2. For disc brakes, when the rubber layer protecting the brake caliper is torn, dirty water can get in and cause rust.When braking, due to the large oil pressure acting on the brake piston, the pin is pushed out, but due to the small return force, it cannot overcome the resistance due to the rusted pin, leading to brake lock.
At this time, it is necessary to remove the battery, clean it thoroughly, and apply grease to fix the above brake jamming phenomenon. The piston is rusted or pitted, the cause of brake jamming is similar and the solution is also to clean as above or replace.
 |
3. Due to external impact on the disc causing deformation, the brake disc does not rotate evenly.but there is a phenomenon of inversion. At that time, the brake pads are always in a state of pressing tightly against the brake disc surface, causing the brakes to lock.
The simplest temporary fix is to remove the seized brake pads until they are fully repaired.
4.During vehicle repair or maintenance,Brake pedal travel is adjusted too small, causing the brake pads to always press against the brake drum or brake disc. When the brake pedal is pressed, it will cause the brake to lock immediately. In the case of no free travel, the brake pads will always rub against the brake drum or brake disc, causing brake pad wear, fuel consumption and possibly leading to brake sticking, causing jamming.
 |
5.After washing the car, driving in the rain or being flooded,Water entering the brake causes the brake pads to expand.leading to brake pad clearance, brake pedal travel is reduced. When braking, it is easy to cause instantaneous locking. A common case with drum brakes is after washing the car or driving in the rain, the car is stored in the garage with the handbrake pulled. The wet brake pads are pressed tightly against the brake drum, causing a vacuum suction, leading to brake locking.
It is recommended to brake lightly to dry the brake pads before storing them in the garage, or not to pull the handbrake when the brakes are still wet. To prevent the car from rolling, the best way is to put the car in reverse (for manual transmission) and shift to P (automatic transmission). If the brakes are stuck in this situation, you can handle it by putting the car in reverse and jerking it until the brakes release.
 |
6.In addition to the above causes, some other cases can cause brake lock related to technical problems such asbrake pad return spring failure, brake master cylinder failureThese cases need to be checked and repaired at reputable garages.
