John Deere stx38 - Manual (Page 14)

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3/20/97
METRIC FASTENER TORQUE VALUES SPECIFICATIONS AND INFORMATION
METRIC FASTENER TORQUE VALUES
Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9
Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a
SIZE N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft
M6 4.8 3.5 6 4.5 9 6.5 11 8.5 13 9.5 17 12 15 11.5 19 14.5
M8 12 8.5 15 11 22 16 28 20 32 24 40 30 37 28 47 35
M10 23 17 29 21 43 32 55 40 63 47 80 60 75 55 95 70
M12 40 29 50 37 75 55 95 70 110 80 140 105 130 95 165 120
M14 63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 109
M16 100 73 125 92 190 140 240 175 275 200 350 225 320 240 400 300
M18 135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410
M20 190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580
M22 260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800
M24 330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000
M27 490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500
M30 675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M33 900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
TS1163
4.8
8.8 9.8
10.9
12.9
5 10
12
Property
Class
and
Head
Markings
Property
Class
and
Nut
Markings
4.8
4.8
5
5
8.8
8.8
9.8
9.8
10.9
10.9 12.9
12.9
12.9
12
12 10 10
10
10 10
DO NOT use these hand torque values if a different
torque value or tightening procedure is given for a
specific application. Torque values listed are for
general use only and include a ±10% variance factor.
Check tightness of fasteners periodically. DO NOT use
air powered wrenches.
Shear bolts are designed to fail under predetermined
loads. Always replace shear bolts with identical grade.
Fasteners should be replaced with the same class.
Make sure fastener threads are clean and that you
properly start thread engagement. This will prevent
them from failing when tightening.
When bolt and nut combination fasteners are used,
torque values should be applied to the NUT instead of
the bolt head.
Tighten toothed or serrated-type lock nuts to the full
torque value.
a “Lubricated” means coated with a lubricant such
as engine oil, or fasteners with phosphate and oil
coatings. “Dry” means plain or zinc plated (yellow
dichromate - Specification JDS117) without any
lubrication.
Reference: JDS—G200.