Torque Specifications; Sae Bolt Torque Specifications - MacDon R85 Operator's Manual

7.2 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.
7.2.1 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 7.1 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
32
3/8-16
7/16-14 52
1/2-13 79
9/16-12 114
5/8-11 157
3/4-10 281
449
7/8-9
1-8 611
169455
MAINTENANCE AND SERVICING
Torque (N·m)
Max. Min. Max.
*117 11.9
*241 24.6
36 44
57 70
87 106
126 153
173 212
311 380
496 606
676 825
13.2
27.1
48
77
118
170
Figure 7.1: Bolt Grades
234
A - Nominal Size
C - SAE-5
420
669
912
96
B - SAE-8
D - SAE-2
Revision F