Service Manual User guide

General Maintenance
3-12 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Fig. 3-2: Metric Class Identification
Table 3-6: General Torques for Metric Bolts, Capscrews, and Nuts
Size Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9
Ft-lbs Nm Ft-lbs Nm Ft-lbs Nm Ft-lbs Nm
M6 3.5 4.8 6.5 9 9.5 13 11.5 15
M88.512162224322837
M101723324347635575
M12294055758011095130
M14 47 63 88 120 130 175 150 205
M16 73 100 140 190 200 275 240 320
M18 100 135 195 260 275 375 325 440
M20 140 190 275 375 400 530 460 625
M22 190 260 375 510 540 725 625 850
M24 250 330 475 650 675 925 800 1075
M27 360 490 700 950 1000 1350 1150 1600
M30 490 675 950 1300 1350 1850 1600 2150
M33 675 900 1300 1750 1850 2500 2150 2900
M36 850 1150 1650 2250 2350 3200 2750 3750
Y1--2
4.8
4.8
4.8
9.88.8
9.8
8.8
12.9
10.9
12.9
12.9
12
10
10
12
10
10
5
5
AND HEAD MARKINGS
PROPERTY CLASS
AND NUT MARKINGS
PROPERTY CLASS
5
8.8
10
10.9 10
12.9 12
9.8