MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company
MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company
Rear Axle and Suspension WARNING! Do not replace U–bolts and nuts with common U–bolts or standard nuts. These parts are critical to vehicle safety. If the wrong U–bolts or nuts are used, the axle could loosen or separate from the vehicle and cause a serious injury accident. Use only U–bolts and nuts of SAE Grade 8 specification or better. WARNING! Do not operate the vehicle if the U– bolts are not properly tightened. Loose U–bolts do not properly secure the axle to the suspension. This could cause loss of vehicle control and an injury accident. Loose U–bolts can also cause uneven tire wear and poor alignment. Suspension alignment should be checked when any one of the following conditions exist: • Discovery of loose suspension fasteners (Any torque below the recommended torque value.). • Discovery of elongated holes in a suspension component. • Bushing replacement. • Excessive or abnormal tire wear. NOTE: To ensure an accurate torque reading, use properly maintained and calibrated torque wrenches. Preventive Maintenance Grade 5 Capscrew Torque Specifications Capscrew Body Torque Size (inches-thread) Lb. ft. N.m. 1/4-20 6—9 8—12 -28 7—10 9.5—14 5/16-18 13—18 18—24 -24 14—20 19—27 3/8-16 22—32 30—43 -24 25—40 34—54 7/16-14 35—50 47—68 -20 39—56 53—76 1/2-13 54—77 73—104 -20 58—87 79—118 9/16-12 78—111 105—151 -18 87—124 118—168 5/8-11 108—154 147—209 -18 122—174 166—236 3/4-10 192—273 260—370 -16 214—305 290—414 7/8-9 309—441 419—598 -14 341—486 462—659 1 -8 464—662 629—898 1-12 508—724 689—982 – 216 – PB1318 3/01 Model 330
Preventive Maintenance Grade 8 Capscrew Torque Specifications Capscrew Body Torque Size (inches-thread) Lb. ft. N.m. 1/4-20 9—12 12—16 -28 10—14 14—19 5/16-18 18—25 24—34 -24 20—28 27—38 3/8-16 31—44 42—60 -24 35—50 47—68 7/16-14 50—71 68—96 -20 56—80 53—108 1/2-13 76—109 103—149 -20 86—123 117—167 9/16-12 110—158 149—214 -18 123—176 167—239 5/8-11 153—218 208—296 -18 173—247 235—335 3/4-10 271—386 367—523 -16 303—431 411—583 7/8-9 437—624 593—846 -14 482—589 654—799 1 -8 656—935 889—1268 1-12 718—1023 973—1386 Rear Axle and Suspension The torque values in the previous tables are based on the use of clean and dry threads. For standard capscrews: 1. Always use the torque values listed the capscrew table. 2. Reduce torque by 10% when engine oil is used as a lubricant. 3. Reduce torque by 20% if new plated capscrews are used. Model 330 PB1318 3/01 – 217 –
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- Page 247 and 248: Other Publications MEDIUM DUTY Main
Preventive Maintenance<br />
Grade 8 Capscrew Torque Specifications<br />
Capscrew Body<br />
Torque<br />
Size<br />
(inches-thread)<br />
Lb. ft. N.m.<br />
1/4-20 9—12 12—16<br />
-28 10—14 14—19<br />
5/16-18 18—25 24—34<br />
-24 20—28 27—38<br />
3/8-16 31—44 42—60<br />
-24 35—50 47—68<br />
7/16-14 50—71 68—96<br />
-20 56—80 53—108<br />
1/2-13 76—109 103—149<br />
-20 86—123 117—167<br />
9/16-12 110—158 149—214<br />
-18 123—176 167—239<br />
5/8-11 153—218 208—296<br />
-18 173—247 235—335<br />
3/4-10 271—386 367—523<br />
-16 303—431 411—583<br />
7/8-9 437—624 593—846<br />
-14 482—589 654—799<br />
1 -8 656—935 889—1268<br />
1-12 718—1023 973—1386<br />
Rear Axle and Suspension<br />
The torque values in the previous tables are based on the<br />
use of clean and dry threads.<br />
For standard capscrews:<br />
1. Always use the torque values listed the capscrew table.<br />
2. Reduce torque by 10% when engine oil is used as a<br />
lubricant.<br />
3. Reduce torque by 20% if new plated capscrews are<br />
used.<br />
Model <strong>330</strong> PB1318 3/01 – 217 –