What is a Dual Servo Brake?

[_travis]

Dual servo brake refers to a brake where both brake shoes act as servo shoes when the vehicle is moving forward. The arrangement of the fixed components in dual leading shoe, bidirectional dual leading shoe, and dual servo brakes is centrally symmetrical. A brake where both brake shoes act as servo shoes when the vehicle is moving forward is called a dual servo brake. A dual shoe brake refers to a brake where both shoes act as leading shoes when the brake drum rotates forward. Dual leading shoe: When the brake drum rotates forward, both shoes act as leading shoes, which is called a dual leading shoe brake. A brake where both brake shoes act as trailing shoes during forward braking is called a dual trailing shoe brake.