Kemper Champion C 1200, Operating Manual

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38 Maintenance and inspection C 1200
Torques for metric bolts
Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9
oiled* dry* oiled* dry* oiled* dry* oiled* dry*
Dimension Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft
M 6 4,8 3,5 6 4,5 9 6,5 11 8,5 13 9,5 17 12 15 11,5 19 14,5
M 8 12 8,5 15 11 22 16 28 20 32 24 40 30 37 28 47 35
M 10 23 17 29 21 43 32 55 40 63 47 80 60 75 55 95 70
M 12 40 29 50 37 75 55 95 70 110 80 140 105 130 95 165 120
M 14 63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 190
M 16 100 73 125 92 190 140 240 175 275 200 350 255 320 240 400 300
M 18 135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410
M 20 190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580
M 22 260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800
M 24 330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000
M 27 490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500
M 30 675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M 33 900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M 36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
The tightening torques are indicated in the table are approximately values and do NOT apply wherever
other tightening torques are quoted in this manual. Bolts and nuts have to be checked periodically for
tightness. The shear bolts are designed in such a way that they break if exposed to a determined load.
When replacing shear bolts use only bolts of the same property class.
When replacing bolts and nuts be sure that the replacement are the same or higher property class.
Bolts and nuts of higher property class have to be tightened to the same torque as the original parts.
Be sure that the threaded portions are clean and the bolts are correctly installed. This will prevent
damage to the bolts to the bolts when same are tightened. Lock nuts (not bolts!) with plastic layer or
steel nuts with flange have to be pulled up to app. 50 % of the value indicated in the table for “dry”
bolts. Toothed or castellated nuts have to be tightened to full torque.
* “Oiled” means that the bolts are provided with a lubricant such as engine oil or that bolts with
phosphate coating or oiled bolts are used. “Dry” means that the unlubricated standard or galvanized
bolts are used.