CONTROL SYSTEM OPERATION (Contd)
Parking Brake System Operation.
A mechanical and air-actuated brake system performs the following for all vehicles covered in this manual:
Keeps vehicle from rolling once it has stopped.
Slows down or stops vehicle movement.
Provides emergency stopping if there is a complete air system failure.
The mechanical brake system is covered below. The compressed air function of the brake system will be covered
in a following paragraph. Major components of the parking brake system are:
PARKING BRAKE WARNING LIGHT - Illuminates when parking brake is engaged.
PARKING BRAKE CONTROL LEVER - Is positioned up to engage parking brake and down to disengage
PARKING BRAKE CONTROL LEVER ADJUSTING KNOB - Permits operator to make minor tension
adjustment of parking brake.
PARKING BRAKE CABLE - Links parking brake lever to brakeshoe lever.
BRAKESHOE LEVER - Lever turns cam which pushes brakeshoes against drum.
PARKING BRAKE ADJUSTING NUT - Permits major tension adjustment between parking brake lever and