OPERATOR'S MANUAL
Table Of Contents
- How to Use This Manual
- Safety Signals
- Vehicle Safety
- How to Find What You Want
- A Special Word About Repairs
- Shop Manuals
- Preventive Maintenance Section
- Additional Sources of Information
- Start–Up
- Instruments and Controls
- Introduction
- Warning Lights and Buzzer
- Self Test
- Speedometer and Odometer
- Tachometer
- Coolant (Water) Temperature Gauge
- Engine Oil Pressure Gauge
- Dual Air Pressure Gauge (Air Reservoir)
- Fuel Gauge
- Voltmeter (option)
- Transmission Temperature Gauge (option)
- Air Filter Restriction Indicator (option)
- Headlight Switch
- Daytime Running Lights (option)
- Panel Lights
- ID and Clearance Lights
- Windshield Wipers/Washer
- Ignition Key Switch
- Parking Brake
- Cruise Control Switch
- Hand Throttle Control
- Heating and Air Conditioning
- Accessories
- Seats
- Steering Column and Mirrors
- Operating the Engine
- Operating the Transmission
- Using the Brake System
- Operating the Rear/Drive Axle
- More Driving Tips and Techniques
- Vehicle Recovery and Spring Brakes
- Shut–Down
- Introduction
- Maintenance Schedule and Lubrication
- Engine Maintenance
- Cooling System
- Brake System
- Air System
- Tires and Wheels
- Heater and Air Conditioner
- Electrical System
- Cab Maintenance
- Transmission and Clutch
- Steering and Driveline
- Front Axle and Suspension
- Rear Axle and Suspension
- Frame and Fifth Wheel
- Noise and Emission Control
- Consumer Information and Vehicle Identification
Using the Brake System Operating Instructions
– 72 –
PB1318 3/01 Model 330
Using the Parking Brake
The yellow diamond-shaped knob on the dash controls the
truck/tractor parking brakes. These are spring brakes that
you activate by releasing air pressure from their chambers.
When they are not in use, air pressure compresses the
springs and releases the brakes. Pulling the knob OUT
applies the parking brake, which exhausts air from the cham-
bers and allows the springs to extend and apply the brakes.
WARNING! Do not pull out the parking brake
valve while the vehicle is moving. Stopping with
the parking brake controls can cause a sudden
wheel lock-up, loss of control, or over-take by
following vehicles. You could be severely
injured.
WARNING! Do not leave the cab without apply-
ing the parking brake. The truck could roll and
cause an injury accident. Always apply the park-
ing brake before you leave the cab.
Before you leave the cab:
1. Apply all parking brakes. Pull out the Yellow Parking
Brake Control knob located on the dash. The Red (octa-
gon-shaped) Trailer Air Supply Control knob on tractors
will automatically pop out. (An optional dash warning
light will indicate when the brake is ON.)
2. Shift the transmission into PARK position:
• manual transmission, select First or Reverse gear
• automatic transmission, select Neutral.
3. Turn the key to OFF.
4. Remove the key.
Full Truck Parking Brake Control Knob
PARKING
BRAKE
PULL
TO APPLY
PUSH TO
RELEASE
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