OPERATOR'S MANUAL

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Table Of Contents

How to Use This Manual
Safety Signals
- WARNING
- CAUTION
- NOTE
Vehicle Safety
How to Find What You Want
A Special Word About Repairs
Shop Manuals
Preventive Maintenance Section
Additional Sources of Information
- Installed Equipment — Operator's Manuals
- Truck Driver's Handbook
- Other Sources
Start–Up
- Introduction
- Door Lock and Keys
- Cab and Frame Access
- Hood Hold Downs and Tilt
- Hood Safety Cable
- Safe Vehicle Operation
- Vehicle Loading
- Emergency Equipment
- Driver's Check List
Instruments and Controls
- Introduction
  - Instrument Index
- Warning Lights and Buzzer
- Self Test
- Speedometer and Odometer
- Tachometer
- Coolant (Water) Temperature Gauge
  - Engine Overheating
- Engine Oil Pressure Gauge
- Dual Air Pressure Gauge (Air Reservoir)
  - Air Loss Emergency Procedure
- Fuel Gauge
- Voltmeter (option)
- Transmission Temperature Gauge (option)
- Air Filter Restriction Indicator (option)
- Headlight Switch
- Daytime Running Lights (option)
- Panel Lights
  - To Operate the Panel Lights:
- ID and Clearance Lights
- Windshield Wipers/Washer
- Ignition Key Switch
- Parking Brake
  - - for trucks with hydraulic brakes:
  - Using the Parking Brake
- Cruise Control Switch
- Hand Throttle Control
Heating and Air Conditioning
- Introduction
- Controls
- Heating
- Defogging
- Cooling
Accessories
- Radio
- Cigarette Lighter
- Ashtray
- Air Operated Horn (Option)
- Glove Compartment
- Dome Light
Seats
- Introduction
- Seat Adjustment
  - Standard Driver's Seat
  - Driver's Seat with Air Suspension (Option)
- Safety Restraint Belts
- Tether Belts
  - Fixed Tethers
  - Tether Adjustment
- Komfort–Lok® Latch
- During Pregnancy
- Passengers
- Belt Damage and Repair
Steering Column and Mirrors
- Introduction
- Turn Signal/High Beam Switch
  - Turn Signals
  - High Beam
- Emergency Flasher Switch
- Trailer Brake Hand Valve
- Adjustable Steering Column (option)
- Horn
- Mirrors
  - Power Mirror (Option)
  - Heated Mirrors (Option)
Operating the Engine
- Introduction
- Starting Procedure — Normal Temperature
  - Use of Accelerator
- Starting Procedure — Cold Weather
  - Engine Block Heater (Option)
  - Cold Weather Starting—Air Intake Heater
- Engine Warm–Up and Idling
  - Warm–Up Procedure
- Idling the Engine
- Engine Fan Switch (Option)
- Cruise Control (Option)
- Engine Shutdown System (Option)
Operating the Transmission
- Introduction
- Operating Manual Transmissions
  - 6, 9, 10, and 11–Speed Manual
  - Transmission Warm–Up
- Putting the Vehicle in Motion
- More Transmission Tips
- Operating Automatic Transmissions
  - The MD Automatic Transmission
Using the Brake System
- Introduction
- Using the Parking Brake
- Tractor and Trailer Air Supply Valve
- Brake Safety and Emergency
- Anti-Lock Braking System
- Trailer Brake Hand Valve
- Driving Bobtail or With an Unloaded Trailer
  - Bobtail Brake Proportioning System
- Engine Retarder (option)
  - Exhaust Brake
- Brake Components
- Hydraulic Brakes
Operating the Rear/Drive Axle
- Introduction
- Interaxle Differential Lock
  - Inter–Axle Differential Lock Operation
More Driving Tips and Techniques
- Introduction
- Coasting
- Descending a Grade
- Economical Driving
- Safe Driving
- Air Suspension Height/Air Pressure
  - Setting Ride Height
  - Driving with Deflated Air Springs
- Fifth Wheel
Vehicle Recovery and Spring Brakes
- Introduction
- Vehicle Recovery Guidelines
  - Recovery Rigging
  - Returning Vehicle to Service
- Spring Brakes — Manual Release
- Freeing the Vehicle from Sand, Mud, Snow and Ice
  - Tire Chains
Shut–Down
- Introduction
- Final Stopping Procedures
- Before Stopping the Engine
  - Turbocharger
- Refuelling
  - Location of Fuel Shut–Off Valves
Introduction
- Safety Precautions
- Environmental Protection and Material Hazards
- How to Order Parts
Maintenance Schedule and Lubrication
- Introduction
- Preventive Maintenance Intervals and Schedule
  - Maintenance Intervals
  - Maintenance Schedule
- Lubrication Specifications
- Oil Reservoirs
- Lubrication Chart
Engine Maintenance
- Engine Lubrication
- Fuel System
- Accessory Drive Belts
- Engine Fan
- Exhaust System
Cooling System
- Introduction
- Radiator and Hose Clamps
- Topping Up
- Adding Coolant
- Change and Refilling
- Engine (Block) Heater (option)
Brake System
- Introduction
- Lubrication
- Checks and Adjustments
- Hydraulic Brake System
- Anti–Lock Braking System (ABS)
Air System
- Introduction
- Scheduled Maintenance
- Air Tanks
- Dual Air Gauge and Air Leaks
- Air Compressor
- Air Dryer
- Air Intake System
- Air Filter Replacement
Tires and Wheels
- Introduction
- General Safety Requirements
- Tire Inspection and Replacement
- Tire Inflation and Loading
- Wheel Mounting and Fastening
- Disc Wheels
- Demounted Rims
- Comparing Hub Piloted and Ball Seat Parts
- Tire Replacement
- Matching Tires
- Wheel and Tire Replacement for Trucks with Hydraulic Brakes
Heater and Air Conditioner
- Introduction
- Special Precautions
- Heater
- Air Conditioner
Electrical System
- Location Of Fuses
- Adding Electrical Options
- Truck-Body Connection
- Batteries
- Battery Care
- Jump Starting Vehicles
- Battery Charging
- Bulb Replacement
- Electrical and Alternator Precautions
Cab Maintenance
- Exterior Maintenance
- Cleaning, Protection and Weather–Stripping
- Safety Restraint System — Inspection
- Windshield Wiper/Washer
- Washer Reservoir
Transmission and Clutch
- Introduction
- All Transmissions
- Manual Transmissions
- Clutch System Introduction
- Clutch Adjustment — Normal Wear
- Automatic Transmissions
Steering and Driveline
- Power Steering
- Fluid Level and Refill
- Steering Driveline
- Driveshaft and U-Joints
Front Axle and Suspension
- Inspection
- Axle Lubrication
- Suspension Lubrication
- Torque
Rear Axle and Suspension
- General Maintenance
- Visual Inspection
- Rear Axle Lubrication
- Rear Suspension Fasteners
Frame and Fifth Wheel
- Introduction
- Fifth Wheel Maintenance
- Sliding Fifth Wheel
Noise and Emission Control
- Noise Emission Warranty
- Inspection and Maintenance Instructions
- Maintenance Log
Consumer Information and Vehicle Identification
- Reporting Safety Defects
- Vehicle Identification
  - Chassis Number Locations
- Complete Vehicle Certification Label
- Incomplete Vehicle Certification Label
- Component Identification

Operating Instructions More Driving Tips and Techniques

Model 330 PB1318 3/01

– 103 –

WARNING! Be extremely careful when deflating

the air springs. The rear of the vehicle will drop

about 3-1/2 inches (88 mm) when the air springs

are deflated. Make sure that no persons or

objects that could be injured or damaged are

under the vehicle.

To minimize the risk of damage or injury, do not

use the dump valve to deflate the air springs.

Operate the height control valve(s) manually to

ensure positive control of air spring deflation.

3. Lower and hold the valve control arm(s) 45 degrees until

the air has been exhausted from the air springs (about

30 seconds).

WARNING! keep away from the air springs as

they are being inflated.

NOTE: On dual-valve systems, begin with the LH

valve on next step.

4. Raise and hold the control arm on the valve (allow for

some delay time) and inflate the air springs until air pres-

sure provides the average air spring height. (Note: For a

dual-valve system, this will be the average height of all of

the rear air springs on a side.)

TYPICAL HEIGHT CONTROL VALVE

TOP VIEW

REAR VIEW

ALIGNMENT PIN

OR DOWEL

CONTROL

ARM

LINK

BOLT

FROM DUMP

VALVE

SWITCH

FORWARD

SUPPLY FROM

FORWARD AIR

TA NK

EXHAUST

AIR BAG

DELIVERY TO

RH AIR BAG(S)

MOUNTING

NUTS

LINK ROD

DELIVERY TO LH

AIR BAG(S)

02941