PART 8: MAINTENANCE AND SERVICE
Standard Capscrew Torque Speci
fi
cations
Standard Capscrew Torque Speci
fi
cations
SAE Grade
Number
5
8
Torque
Torque
Capscrew
Body Size
(inch-
esthread)
Lb. ft.
N.m.
Lb. ft.
N.m.
1/4-20
6 - 9
8 - 12
9 - 12
12 - 16
1/4-28
7 - 10
9.5 - 14
10 - 14
14 - 19
5/16-18
13 - 18
18 -24
18 - 25
24 -34
5/16-24
14 - 20
19 - 27
20 -28
27 - 38
3/8-16
22 - 32
30 - 43
31- 44
42 - 60
3/8-24
25 - 40
34 - 54
35 - 50
47 -68
7/16-14
35 - 50
47 - 68
50 - 71
68 - 96
7/16-20
39 - 56
53 - 76
56 - 80
76 - 108
1/2-13
54 - 77
73 - 104
76 - 109
103 - 149
1/2-20
58 - 77
79 - 118
86 -123
117 - 167
9/16-12
78 - 111
105 - 151
110 -158
149 - 214
9/16-18
87 - 124
118 - 168
123 -176
167 - 239
5/8-11
108 - 154
147 - 209
153 -218
208 - 296
SAE Grade
Number
5
8
Torque
Torque
Capscrew
Body Size
(inch-
esthread)
Lb. ft.
N.m.
Lb. ft.
N.m.
5/8-18
122 - 174
166 - 236
173 -247
235 - 335
3/4-10
192 - 273
260 - 370
271 -386
367 - 523
3/4-16
214 - 305
290 - 414
303 - 431
411 - 583
7/8-9
309 - 441
419 - 598
437 - 624
593 - 846
7/8-14
341 - 486
462 - 659
482 - 589
654 - 799
1-8
464 - 662
629 - 898
656 - 935
889 - 1268
1-12
508- 724
698 - 982
718 - 1023
973 - 1386
The torque values in the previous tables are based on the
use of clean and dry threads.
Frame Fasteners
• Go around your vehicle as per "PART 8: MAINTE-
NANCE AND SERVICE" and tighten all frame fasten-
ers with a torque wrench.
• Always use the torque values listed in the frame fas-
tener table.
R(08/07)
Y53-6015
– 179 –
Summary of Contents for Peterbilt 320
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Page 210: ...PART 11 SUBJECT INDEX Windshield Washer Reservoir 29 206 Y53 6015 R 08 07 ...
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