What is leading trailing brake?

Leading / trailing drum brake is a basic type of drum brake design. The term “leading/trailing” means that only one shoe is “leading”, moving into the rotation of the drum and thus exhibiting a self-servo (or self-applying) effect.

Which brake shoe is the leading shoe?

The leading shoe (closest to the front of the vehicle) is known as the primary shoe. The trailing shoe is known as the secondary shoe. Hydraulic pressure from the master cylinder acts on the piston cup, pushing the pistons toward the shoes, forcing them against the drum.

What is effect of leading shoe when it is applied to a brake drum which is rotating in a forward direction the shoe is pushed?

Leading/trailing shoe type drum brake The other shoe is called the “trailing (secondary) shoe.” The leading shoe is pressed in the same direction as the rotation of the drums, and this rotation helps to press the shoes against the drum with greater pressure for stronger braking force.

What is the difference between leading and trailing brake shoes?

In drum braking systems, the leading shoe is one that rotates in the direction of the drum. The trailing shoe is on the other side of the assembly, and pulls away from the rotating surface. Leading-trailing shoe braking systems are just as capable of stopping reverse motion as they are at stopping forward.

What is a characteristic of a leading-trailing drum brake?

What would occur if the star wheel adjuster from the left side was put on the right side?

What would occur if the star wheel adjuster from the left side was put on the right side? The star wheel will function normally. The brake shoes will self-adjust away from the drum surface.

What is the difference between leading shoe and trailing shoe?

Leading-Trailing Shoe In drum braking systems, the leading shoe is one that rotates in the direction of the drum. The trailing shoe is on the other side of the assembly, and pulls away from the rotating surface.

How do you tell the difference between primary and secondary brake shoes?

No the primary aka front shoe is always the short one or the one with the least amount of friction material. The secondary or rear shoe always has the most friction material. Some discount brake reliners use the same size lining front and rear but use different friction material.

Why the leading brake shoe wears quicker than the trailing shoe?

The rate of lining wear of leading shoe is higher as it does more work than the trailing shoe. Therefore, leading shoe reaches its wear limit well before the trailing shoe, unless a thicker lining is used.

Are trailing shoes self energizing?

Leading and trailing shoe brakes are still selected on the rear wheels because they easily accommodate the handbrake mechanism and produce an extra self-energizing effect when the handbrake is applied.