What Causes Brake Pulling?

[June]

Brake pulling can be caused by the following reasons: Uneven braking force: Inconsistent braking force between the left and right wheels on the same axle. Asynchronous braking caused by uneven clearance between the rear brake shoes and brake drums, or differences in contact area can also lead to uneven braking force on both sides. In such cases, adjust the left and right brake clearances according to specifications or polish the contact surfaces of the brake shoes. Uneven braking torque: Different braking torque on the left and right sides of the same axle, resulting in one-sided braking. Common causes include brake cylinder oil leakage, piston rust, oil contamination on drum brake shoes, or differences in surface roughness between brake discs and pads or drums and shoes. These issues should be addressed during inspection as needed. Uneven tire conditions: Differences in tire pressure, tread patterns, or wear levels between the two sides can cause the actual rolling radius of the wheels to differ, leading to unequal straight-line travel distances. This can cause the vehicle to pull to one side even when not braking. Unequal wheelbase: Improper body repair on accident-damaged vehicles can result in unequal wheelbase on both sides. Suspension components such as uneven or failed shock absorber springs, loose suspension ball joints, or deformed connecting rods can interfere with each other during braking, causing brake pulling. Additionally, incorrect four-wheel alignment can also lead to this phenomenon.