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
Preventive Maintenance Front Axle and Suspension
Model 330 PB1318 3/01
– 209 –
FRONT AXLE AND SUSPENSION
Inspection
For all vehicles, mandatory maintenance procedures include
retightening all U–bolts and inspecting the suspension for
loose fasteners, abnormal wear, or damage. However, even
with proper maintenance, the service life of leaf springs is
affected by many factors, such as: fatigue, vehicle gross
weight, type of load, road conditions, and vehicle speed.
• Check for cracks, wear marks, splits, or other defects on
the surface of the spring. Defective parts must be
replaced. Because repaired springs cannot be fully
restored to their original service life, replace the com-
plete assembly if cracks or other defects are detected.
• Visually inspect shock absorbers and rubber bushings.
See the Medium Duty Maintenance Manual for further
information on servicing the front suspension.
Axle Lubrication
• Change bearing lubrication when seals are replaced, or
brakes are relined. See Table 2, “Recommended Mainte-
nance Intervals,” Page 121.
Front Suspension
00439
SPRING AND
SHACKLE PINCH
BOLTS
SPRING
ANCHOR
PINS
U-BOLTS
SPRING
ANCHOR PIN