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
Operating Instructions Instruments and Controls
Model 330 PB1318 3/01
– 29 –
Air Filter Restriction Indicator (option)
This gauge indicates the condition of the engine air cleaner
and is measured by inches of water. A clean filter should reg-
ister 7 in. of water and a filter whose life is over will register
approximately 25 in.
CAUTION: Do not continue to operate with the
Air Filter Restriction Gauge reading 25 in. (start
of red area). It could lead to damage to the
engine. Inspect the filter and replace if neces-
sary.
Holes in the paper element render an air cleaner useless and
may cause the Air Filter Restriction Gauge to give a false
reading, even if the element is clogged. Replace the element
if it is damaged. See
page 170
for information on Air Filter
Replacement.
Headlight Switch
The headlights are controlled by a toggle
switch on the left instrument panel. See
page 16
. When the headlights are ON,
the dash lights, side, and tail lamps are
also on.
For High Beam operation see
page 52
.
Air Filter Restriction Indicator
02583
RED
CAUTION
AREA