Torque Specifications; Sae Bolt Torque Specifications - MacDon D65 Operator's Manual

8.2 Torque Specifications
The following tables provide the correct torque values for various bolts, cap screws, and hydraulic fittings.
• Tighten all bolts to the torque values specified in the charts (unless otherwise noted throughout this manual).
• Replace hardware with the same strength and grade of bolt.
• Use the 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.
8.2.1 SAE Bolt Torque Specifications
Torque values shown in the 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 8.2 SAE Grade 5 Bolt and Grade 5 Free
Spinning Nut
Torque (ft·lbf)
Nominal
(*in·lbf)
Size (A)
Min.
1/4-20 *106
5/16-18 *218
3/8-16 32
7/16-14 52
1/2-13 79
114
9/16-12
5/8-11 157
3/4-10 281
7/8-9 449
1-8 611
147725
REFERENCE
Torque (N·m)
Max. Min. Max.
11.9 13.2
*117
*241 24.6 27.1
36 44
57 70
87 106 118
126 153 170
173 212 234
311 380 420
496 606 669
676 825 912
48
77
Figure 8.1: Bolt Grades
A - Nominal Size
C - SAE-5
254
B - SAE-8
D - SAE-2
Revision A