Reference; Torque Specifications; Sae Bolt Torque Specifications - MacDon M Series Unloading And Assembly Instructions

6 Reference

6.1 Torque Specifications
The following tables provide correct torque values for various bolts, cap screws, and hydraulic fittings.
• Tighten all bolts to torque values specified in charts (unless otherwise noted throughout this manual).
• Replace hardware with same strength and grade of bolt.
• Use torque value tables as a guide and periodically check tightness of bolts.
• Understand torque categories for bolts and cap screws by using their identifying head markings.
6.1.1 SAE Bolt Torque Specifications
Torque values shown in following tables 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 6.1 SAE Grade 5 Bolt and Grade 5 Free
Spinning Nut
Torque (N·m)
Nominal
Size (A)
Min.
1/4-20 11.9
5/16-18 24.6
3/8-16 44
7/16-14 70
106
1/2-13
153
9/16-12
5/8-11 212
3/4-10 380
7/8-9 606
1-8 825
147962
Torque (ft·lbf)
(*in·lbf)
Max. Min. Max.
13.2 *106 *117
27.1 *218 *241
48 32
77 52
118 79
170 114 126
234 157 173
420 281 311
669 449 496
912 611 676
36
57
87
Figure 6.1: Bolt Grades
A - Nominal Size
C - SAE-5
357
B - SAE-8
D - SAE-2
Revision A