7
Bolt Torque Specifications
TIGHTENING WHEEL NUTS:
Torque 9/16”-18 lug nuts on wheels to 170 ft-lbs during initial operation of the header wagon. Check
for proper torque after every 10 hours of use. Failure to do so may damage wheel nut seats. Once seats are damaged it will become
impossible to keep nuts tight.
Always tighten hardware to these values unless a different torque or tightening procedure is listed for specific application. Fasteners must
always be replaced with the same grade as specified in the manual parts list. Always use the proper tool for tightening hardware. Make
sure fastener threads are clean and you start thread engagement properly.
Use these values when tightening all bolts and nuts with
the exception of wheel nuts.
Stud and Wheel Nut Torque Specifications
Stud
Tightening Torque
1/2”-20
80 ft-lbs
9/16”-18
170 ft-lbs
5/8”-18
350 ft-lbs
3/4”-16
400 ft-lbs
20mm
475 ft-lbs
22mm
640 ft-lbs
Always tighten hardware to these values unless a different torque or tightening procedure is listed for specific application. Fasteners must
always be replaced with the same grade as specified in the manual parts list. Always use the proper tool for tightening hardware. Make
sure fastener threads are clean and you start thread engagement properly.
Use these values when tightening all studs and wheel
nuts.
SAE Fasteners
Coarse Thread Series
Grade 5
Grade 8
Diameter and Pitch (Inches) Dry
Oiled
Dry
Oiled
1/4”-20
8 ft-lbs
6 ft-lbs
12 ft-lbs 9 ft-lbs
5/16”-18
17
13
25
18
3/8”-16
31
23
44
33
7/16”-14
49
37
70
52
1/2”-13
75
57
106
80
9/16”-12
109
82
154
115
5/8”-11
150
113
212
159
3/4”-10
267
200
376
282
7/8”-9
429
322
606
455
1”-8
644
483
909
681
Fine Thread Series
Diameter and Pitch (Inches) Dry
Oiled
Dry
Oiled
1/4”-28
10 ft-lbs 7 ft-lbs
14 ft-lbs 10 ft-lbs
5/16”-24
19
15
27
20
3/8”-24
35
26
49
37
7/16”-20
55
41
78
58
1/2”-20
85
64
120
90
9/16”-18
121
91
171
128
5/8”-18
170
127
240
180
3/4”-16
297
223
420
315
7/8”-14
474
355
669
502
Summary of Contents for 4WS15
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