What Causes a Truck to Pull to One Side When Braking?

1 Answers
DaniellaRose
07/29/25 5:06pm
The reasons for braking deviation are as follows: 1. Uneven braking force on the left and right sides of the same axle: Different clearances between the rear brake shoes and drums on each side can cause asynchronous braking, or variations in contact area can also lead to uneven braking force. If this occurs, adjust the left and right brake clearances according to specifications or resurface the contact area of the brake shoes. 2. Different braking torque on the left and right sides of the same axle: This results in one-sided braking. Common causes include leaking brake wheel cylinders, rusted pistons, oil-contaminated drum brake shoes, or differing surface roughness between brake discs and pads or drums and shoes. Inspect and rectify these issues as needed. 3. Uneven tire pressure, tread patterns, or wear levels on both sides: This can cause the actual rolling radius of the wheels to differ, leading to unequal straight-line travel distances. In such cases, the vehicle may pull to one side even when not braking. 4. Improper body repair on a previously damaged vehicle resulting 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 the vehicle to pull to one side. Additionally, incorrect wheel alignment can also lead to this phenomenon.
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