Lesson 1/Learning Event 1
MECHANICAL BRAKE SYSTEMS
On wheeled vehicles, the energy supplied by the operator's foot
pushing down on the brake pedal is transferred to the brake mechanism
on the wheels by various means. A mechanical hookup was used on the
first motor vehicles. Now, mechanicallyoperated braking systems are
practically obsolete. However, mechanical hookups are still used for
a part of the braking systems in many vehicles.
PARKING BRAKE
The parking brake (auxiliary brake) is generally used to lock the
rear wheels or propeller shafts of a vehicle to prevent the vehicle
from rolling when it is parked. It can also be used to stop the
vehicle in an emergency if the service brakes fail. For this reason,
the parking brake is sometimes referred to as the emergency brake.
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