7
Bolt Torque Chart
TIGHTENING WHEEL NUTS: During initial operation of the Soil Conditioner, tighten 1/2”-20 gauge wheel studs and nuts to torque 80
ft-lbs. 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.
SAE Fasteners
Always tighten hardware to these values unless a dierent torque or tightening procedure is listed for specic application. Fasteners must
always be replaced with the same grade as specied 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 Specications
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 dierent torque or tightening procedure is listed for specic application. Fasteners must
always be replaced with the same grade as specied 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.
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
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