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
169457
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
100
B - SAE-8
D - SAE-2
Revision G