MAINTENANCE AND SERVICING
5.2 Torque Specifications
The following tables give correct torque values for various bolts, cap screws, and hydraulic fittings.
• Tighten all bolts to the torques specified in chart (unless otherwise noted throughout this manual).
• Replace hardware with the same strength and grade bolt.
• Check tightness of bolts periodically, using the tables below as a guide.
• Torque categories for bolts and cap screws are identified by their head markings.
5.2.1 S AE Bolt Torque Specifications
Torque values shown in this table are valid for non-greased, or non-oiled threads and heads. Therefore, do NOT
grease or oil bolts or cap screws unless otherwise specified in this manual.
Table 5.1 SAE Grade 5 Bolt and Grade 5 Free
Spinning Nut
Torque (f t·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20 *106 *117
11 .9 13.2
5/16-18 *218 *241
24.6 27.1
3/8-16
32 36 44 48
7/16-14
52
57
70
77
1/2-13
79 87 106 118
9/16
-12
114 126 153 170
5/8-11
157 173 212 234
3/4-10
281 311 380 420
7/8
-9
449 496 606 669
1-8 611 676 82 5 912
Figure
5.1: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
169890 186 Revision A
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