TM 9-2320-272-24-l
l-20. CONTROL SYSTEM OPERATION (Contd)
c. Parking Brake System Operation.
A mechanical and air-actuated brake system performs the following for all vehicles covered in this
manual:
(1) Keeps vehicle from rolling once it has stopped.
(2) Slows down or stops vehicle movement.
(3) 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:
Key Item and Function
7
PARKING BRAKE WARNING LIGHT - Illuminates when parking brake is engaged.
8
PARKING BRAKE CONTROL LEVER - Is positioned up to engage parking brake; down to
disengage parking brake.
9
PARKING BRAKE CONTROL LEVER ADJUSTING KNOB - Permits operator to make minor
tension adjustment of parking brake.
10
PARKING BRAKE CABLE - Links parking brake control lever to brakeshoe lever.
11
BRAKESHOE LEVER - Lever turns cam which pushes brakeshoes against drum.
12
PARKING BRAKE ADJUSTING NUT - Permits major tension adjustment between parking brake
lever and brakeshoes.
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