PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —152— 22-01691 (R02/02)
Standard Capscrew Torque Specifications
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.
Frame Fasteners
1. Go around your Peterbilt vehicle as per the Preventive Mainte-
nance Schedule and tighten all frame fasteners with a torque
wrench.
2. Always use the torque values listed in frame fastener table.
3. Always torque fasteners from the nut end.
SAE Grade
Number
58
Capscrew Body
Size
(inches-thread)
Torque Torque
Lb. ft. N.m. Lb. ft. N.m.
1/4-20 6 - 9 8 - 12 9 - 12 12 - 16
-28 7 - 10 9.5 - 14 10 - 14 14 - 19
5/16-18 13 - 18 18 - 24 18 - 25 24 - 34
-24 14 - 20 19 - 27 20 - 28 27 - 38
3/8-16 22 - 32 30 - 43 31 - 44 42 - 60
-24 25 - 40 34 - 54 35 - 50 47 - 68
7/16-14 35 - 50 47 - 68 50 - 71 68 - 96
-20 39 - 56 53 - 76 56 - 80 76 - 108
1/2-13 54 - 77 73 - 104 76 - 109 103 - 149
-20 58 - 87 79 - 118 86 - 123 117 - 167
9/16-12 78 - 111 105 - 151 110 - 158 149 - 214
-18 87 - 124 118 - 168 123 - 176 167 - 239
5/8-11 108 - 154 147 - 209 153 - 218 208 - 296
-18 122 - 174 166 - 236 173 - 247 235 - 335
3/4-10 192 - 273 260 - 370 271 - 386 367 - 523
-16 214 - 305 290 - 414 303 - 431 411 - 583
7/8-9 309 - 441 419 - 598 437 - 624 593 - 846
-14 341 - 486 462 - 659 482 - 589 654 - 799
1 -8 464 - 662 629 - 898 656 - 935 889 - 1268
1-12 508 - 724 689 - 982 718 - 1023 973 - 1386
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