MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company
MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company
Tires and Wheels Preventive Maintenance Table 14 Comparing Hub-piloted and Ball-seat Wheels HUB–PILOTED MOUNT BALL–SEAT MOUNT 00187 00203 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. – 180 – PB1318 3/01 Model 330
Preventive Maintenance Tire Replacement Front: replace front tires when less than 4/32 in. of tread depth remains. Check depth at three places equally spaced around the tire. Drive Axles or Trailers: replace tires on drive axles when less than 2/32 in. of tread depth remains in any major groove. Check depth at three places equally spaced around the tire. WARNING! Do not install regrooved or reinforcement-repaired tires on steering axles. They could fail unexpectedly and cause you to lose control of your vehicle resulting in an injury accident. WARNING! Do not replace original equipment tires with load ratings less than the original tires. Doing so could lead to unintentional overloading of the tire, which could cause a failure resulting in loss of vehicle control and an injury accident. Tires and Wheels NOTE: To prolong the tires’ life and make them safer, have their radial and lateral run-out checked at your Peterbilt Dealer. And of course have the tires balanced any time you change a tire. Matching Tires Be sure to buy matched tires for your vehicle, especially on the rear axles. Mismatched tires can cause stress between axles and cause the temperature of the axle lubricant to get too hot. Matched tires will help the driveline last longer and will give you better tire mileage. WARNING! Do not mismatch tires, it can be dangerous. Never mix tires of different design such as steel belted radials and bias ply tires, etc. Mixing tire types and sizes will adversely affect the road-holding ability of both types of tires and can lead to loss of vehicle control and serious personal injury. Make sure, too, that you use the right size tires on each wheel. Some trucks require different sizes on front and rear wheels. For safety, always use the recommended size and type of tires. Model 330 PB1318 3/01 – 181 –
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Preventive Maintenance<br />
Tire Replacement<br />
Front: replace front tires when less than 4/32 in. of tread<br />
depth remains. Check depth at three places equally spaced<br />
around the tire.<br />
Drive Axles or Trailers: replace tires on drive axles when<br />
less than 2/32 in. of tread depth remains in any major groove.<br />
Check depth at three places equally spaced around the tire.<br />
WARNING! Do not install regrooved or reinforcement-repaired<br />
tires on steering axles. They<br />
could fail unexpectedly and cause you to lose<br />
control of your vehicle resulting in an injury<br />
accident.<br />
WARNING! Do not replace original equipment<br />
tires with load ratings less than the original<br />
tires. Doing so could lead to unintentional overloading<br />
of the tire, which could cause a failure<br />
resulting in loss of vehicle control and an injury<br />
accident.<br />
Tires and Wheels<br />
NOTE: To prolong the tires’ life and make them<br />
safer, have their radial and lateral run-out checked at<br />
your <strong>Peterbilt</strong> Dealer. And of course have the tires<br />
balanced any time you change a tire.<br />
Matching Tires<br />
Be sure to buy matched tires for your vehicle, especially on<br />
the rear axles. Mismatched tires can cause stress between<br />
axles and cause the temperature of the axle lubricant to get<br />
too hot. Matched tires will help the driveline last longer and<br />
will give you better tire mileage.<br />
WARNING! Do not mismatch tires, it can be dangerous.<br />
Never mix tires of different design such<br />
as steel belted radials and bias ply tires, etc.<br />
Mixing tire types and sizes will adversely affect<br />
the road-holding ability of both types of tires and<br />
can lead to loss of vehicle control and serious<br />
personal injury.<br />
Make sure, too, that you use the right size tires on each<br />
wheel. Some trucks require different sizes on front and rear<br />
wheels. For safety, always use the recommended size and<br />
type of tires.<br />
Model <strong>330</strong> PB1318 3/01 – 181 –