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
Heating and Air Conditioning Operating Instructions
– 40 –
PB1318 3/01 Model 330
For Efficient Cooling:
1. Ensure all heater/air conditioner controls are off.
2. Start the engine. Allow time for warm–up.
NOTE: A cold compressor can cause refrigerant to
liquefy and warp the valve plates or cause a hydrau-
lic lock. Warm the engine before starting the air con-
ditioner.
3. Set the air conditioner for maximum cooling.
4. Close all windows.
5. Idle the engine between 1,000 and 1,500 rpm and turn
the fan switch to High.
6. After the cab temperature cools to a comfortable level,
adjust the fan speed and other controls to keep the
desired condition.
If the air conditioner does not cool the air, have the
unit checked at an Authorized Service Center.
NOTE: When the air conditioner isn’t in regular use,
operate it for at least 15 minutes at least once a
month or every 5,000 miles (8,000 km), whichever
comes first. This will lubricate the seals in the air
conditioning system.