Maintenance Specifications; Recommended Torques - MacDon R85 Operator's Manual

7.3 MAINTENANCE SPECIFICATIONS

7.3.1

Recommended Torques

•
Tighten all bolts to the torques specified in
chart unless otherwise noted throughout this
manual.
•
Check tightness of bolts periodically, using
bolt torque chart as a guide.
•
Replace hardware with the same strength
bolt.
•
Torque figures are valid for non-greased or
non-oiled threads
otherwise specified. Do not grease or oil
bolts or capscrews unless specified in this
manual.
•
When using locking elements, increase
torque values by 5%.
7.3.1.1 SAE Bolts
NC BOLT TORQUE*
BOLT
DIA.
SAE 5
"A"
in. lbf·ft
1/4 9
5/16 18
3/8 32
7/16 50
1/2 75
9/16 110
5/8 150
3/4 265
7/8 420
1 640
* Torque categories for bolts and capscrews are identified by their
head markings.
Form # 169455
MAINTENANCE AND SERVICE
and heads unless
SAE 8
N·m lbf·ft N·m
12 11 15
24 25 34
43 41 56
68 70 95
102 105 142
149 149 202
203 200 271
359 365 495
569 600 813
867 890 1205
SAE-5 SAE-8
7.3.1.2 Metric Bolts
BOLT
DIA.
"A"
lbf·ft
M3 0.4
M4 2.2
M5 4
M6 7
M8 18
M10 37
M12 66
M14 103
M16 166
M20 321
M24 553
M30 1103
M36 1917
* Torque categories for bolts and capscrews are identified by their
head markings.
40
NC BOLT TORQUE*
8.8 10.9
N·m lbf·ft N·m
0.5 1.3 1.8
3 3.3 4.5
6 7 9
10 11 15
25 26 35
50 52 70
90 92 125
140 148 200
225 229 310
435 450 610
750 774 1050
1495 1550 2100
2600 2710 3675
Revision A