Maintenance
47
Inspection
Screwed assembly
Regularly check wheel nuts for tightness and the hub clearance
adjustment.
All bolts must be re-tightened:
•
After initial use.
•
Depending on the intervention frequency.
•
At least once a season.
Standard tightening
torques
Unless otherwise specified, all screwed assemblies should be
tightened in accordance with the table below. The values shown apply
to rigid assemblies with normal thread pitches and no bearing washer.
Values provided for assembly with no special lubrication:
Fasteners
Diameter
of the screw
Quality 8.8
Quality 10.9
Quality 12.9
N.m
ft.lbf
N.m
ft.lbf
N.m
ft.lbf
3
1.41
1.04
2.07
1.53
2.43
1.79
4
3.22
2.38
4.74
3.50
5.5
4.06
5
6.4
4.72
9.4
6.94
11
8.12
6
11.1
8.19
16.3
12.03
19.1
14.10
8
27
20
39
29
46
34
10
53
39
78
58
92
68
12
92
68
136
100
159
117
14
148
109
218
161
255
188
16
232
171
341
252
399
294
18
330
244
469
346
549
405
20
471
348
667
492
781
576
22
648
478
920
679
1077
795
24
809
597
1148
847
1343
991
27
1201
886
1706
1259
1997
1474
30
1628
1201
2311
1706
2704
1996
33
2216
1635
3148
2323
3684
2719
36
2840
2096
4036
2979
4723
3486
39
3697
2728
5255
3878
6150
4539
Use only the screws supplied
The securing screws supplied are special screws that have to
meet particular requirements. Commercially available screws will
not stand up to the stresses on the machine. If you use inappro-
priate screws or if you do not tighten them to the recommended
torque, the machine could be damaged.
Using the machine with loose mechanical fasteners could damage
the machine and cause accidents.