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
Tires and Wheels Preventive Maintenance
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PB1318 3/01 Model 330
Table 14 Comparing Hub-piloted and Ball-seat Wheels
HUB–PILOTED MOUNT
BALL–SEAT MOUNT
Hub, Drum, and Stud Assembly
Hub-piloted mountings use M22 x 1.5 metric threads (about 7/8 in.
diameter). The stud stands out at least 1.94 in. beyond the brake drum.
All studs are right-hand threads. Pilot bosses (machined surfaces) on
the hub, fit tightly to the wheel center bore.
Ball-seat (stud-piloted) mountings use 3/4x16 or 1-1/8x16 threads. The
dual mounting studs provide 1.30 in. –1.44 in. standout. Right-hand
and left-hand threads are required. Inner and outer wheel nuts center
the wheels by seating against wheel ball seats.
Wheels
Hub-piloted wheels have stud holes reamed straight through (no ball
seats). Center bore diameter is 8-21/32 in.
Ball-seat wheels have spherical chamfers machined on each stud hole.
Center bore diameter is 8-23/32 in.
Wheel Nuts
Hub-piloted wheel nuts have a hex body and a flange for clamping
against wheel face. Hex size is 1-5/16 in. (33 mm).
Ball-seat inner and outer wheel nuts mate with spherical chamfers on
wheels. The inner nut has 13/16 in. square end. The outer nut has a
1-1/2 in. hex.
00187
00203