8
Bolt Torque Chart
TIGHTENING WHEEL NUTS: Standard 3/4” wheel studs and nuts should be tightened to torque 400 ft-lbs. During initial operation of
the grain cart and then checked 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 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
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.
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 30 23 45 35
7/16”-14 50 35 70 55
1/2”-13 75 55 110 80
9/16”-12 110 80 150 110
5/8”-11 150 110 220 170
3/4”-10 260 200 380 280
7/8”-9 430 320 600 460
1”-8 640 480 900 680
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 14 29 20
3/8”-24 35 25 50 40
7/16”-20 55 40 80 60
1/2”-20 90 65 120 90
9/16”-18 120 90 170 130
5/8”-18 180 130 240 180
3/4”-16 300 220 420 320
7/8”-14 470 360 660 500
Stud Tightening Torque
1/2”-20 120 ft-lbs
9/16”-18 170 ft-lbs
5/8”-18 300 ft-lbs
3/4”-16 400 ft-lbs
20mm 475 ft-lbs
22mm 640 ft-lbs
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