Bolt Torque - Crown 4S Operator's Manual

7.2

BOLT TORQUE

CHECKING BOLT TORQUE
The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to the torques
specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt torque chart as a guide.
Replace hardware with the same strength bolt.
Imperial Torque Specifications
Bolt
Dia.
SAE 2
"A"
Nm Ft-Lbs
1/4 8 6
5/16 13 10
3/8 27 20
7/16 41 30
1/2 61 45
9/16 95 60
5/8 128 95
3/4 225 165
7/8 230 170
1 345 225
SAE-2
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise specified.
Therefore, do not grease or oil bolts or capscrews unless otherwise specified in this manual. When using locking ele-
ments, increase torque values by 5%.
WHEEL LUG NUT TORQUE:
Use the tightening pattern shown below, to ensure the even
tightening of the lug nuts on each wheel.
* Torque value for bolts and capscrews are identified by their head markings.
Bolt Torque*
SAE 5 SAE 8
Nm Ft-Lbs Nm Ft-Lbs
12 9 17
25 19 36
45 33 63
72 53 100
110 80 155
155 115 220
215 160 305
390 290 540
570 420 880
850 630 1320
SAE-5 SAE-8
Bolt Bolt Torque
Dia Nm
1/2" 136
9/16" 203
47
Metric Torque Specifications
Bolt
Dia.
8.8
"A"
Nm
12 M4 3
27 M5 6
45 M6 10
75 M8 25
115 M10 50
M12
165 90
220 M14 140
400 M16 225
650 M20 435
970 M24 750
Ft-Lbs
100
150
Bolt Torque*
10.9
Ft-Lbs Nm Ft-Lbs
2.2 4.5 3.3
4 9 7
7 15 11
18 35 26
37 70 52
66 125 92
103 200 148
166 310 229
321 610 450
553 1050 774
10.9