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

– iv –

Model 330

Air Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Dual Air Gauge and Air Leaks . . . . . . . . . . . . . . . . . . . 166

Air Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Air Dryer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Air Intake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Air Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 170

Tires and Wheels

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

General Safety Requirements . . . . . . . . . . . . . . . . . . . 172

Tire Inspection and Replacement . . . . . . . . . . . . . . . . . 173

Tire Inflation and Loading . . . . . . . . . . . . . . . . . . . . . . . 173

Wheel Mounting and Fastening . . . . . . . . . . . . . . . . . . 176

Disc Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Demounted Rims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Comparing Hub Piloted and Ball Seat Parts . . . . . . . . 179

Tire Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Matching Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Wheel and Tire Replacement for Trucks with Hydraulic

Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Heater and Air Conditioner

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Air Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Electrical System

Location Of Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Adding Electrical Options . . . . . . . . . . . . . . . . . . . . . . . 185

Truck-Body Connection . . . . . . . . . . . . . . . . . . . . . . . . 185

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Battery Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Jump Starting Vehicles . . . . . . . . . . . . . . . . . . . . . . . . 187

Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Electrical and Alternator Precautions . . . . . . . . . . . . . 194

Cab Maintenance

Exterior Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 195

Cleaning, Protection and Weather–Stripping . . . . . . . 196

Safety Restraint System — Inspection . . . . . . . . . . . . 198

Windshield Wiper/Washer . . . . . . . . . . . . . . . . . . . . . . 201

Washer Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Transmission and Clutch

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

All Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Manual Transmissions . . . . . . . . . . . . . . . . . . . . . . . . 202

Clutch System Introduction . . . . . . . . . . . . . . . . . . . . . 203

Clutch Adjustment — Normal Wear . . . . . . . . . . . . . . 204

Automatic Transmissions . . . . . . . . . . . . . . . . . . . . . . 205

Steering and Driveline

Power Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Fluid Level and Refill . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Steering Driveline . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Driveshaft and U-Joints . . . . . . . . . . . . . . . . . . . . . . . . 208

Front Axle and Suspension

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Axle Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Suspension Lubrication . . . . . . . . . . . . . . . . . . . . . . . . 210