Maintenance
83
Screw connections
Re-tightening the bolts
All bolts must be re-tightened:
•
After the first hours of operation
•
Depending on the frequency of use
•
But at least once a season
Tightening torques, gen-
eral
Tighten all screw connections using the information provided in the ta-
ble. If other tightening torques are necessary, they are specified in the
chapter »Maintenance«. The minimum quality of the bolts is “8.8”.
Bolt size
Bolt quality
„8.8“
„10.9“
„12.9“
Tightening torques in Nm
M6
9,9
14
17
M8
24
34
41
M10
48
68
81
M12
85
120
145
M16
210
290
350
M20
425
610
710
M24
730
1050
1220
M12x1.5
75
89
125
M14x1.5
125
150
205
M16x1.5
190
220
310
M18x1.5
270
320
450
M20x1.5
380
450
630
M22x1.5
510
600
850
M24x1.5
670
800
1120
M27x1.5
990
1170
1640