In drum braking systems, commonly used in automotive applications, Everyone drum consists of a important and a secondary brake shoe, trumped-up from steel, iron or aluminium. This, in turn, forces the secondary shoe to contact the brake drum.
Brake Lining
The primary brake shoe as well attaches the brake lining to a stationary unit, proclaimed as a backing plate. The meaningful brake shoe has a slightly shorter lining and a smaller surface field than the secondary brake shoe.
The revolve cylinder, under hydraulic strength, forces the shoes against the drum, creating a braking business.
Operation
The important, or substantial, brake shoe is the one that is adjacent to the front of a vehicle. The friction between the substantial brake shoe and the brake drum forces the shoe to lift slightly, under the bridle of an anchor pin.Reversal
If you are changing brake shoes, you should be aware that it is possible to incorrectly reverse the primary brake shoes. It is therefore wise to disassemble just one brake at a time, so that you have an intact brake for reference purposes.