Maintenance
92
Screwed
connections
On this machine, screws with a minimum quality of “8.8” (can be seen
on the screw head) are used.
Tightening bolts
All bolts must be retightened:
•
After the first 5 hours of operation.
•
According to the frequency of use.
•
At least once a season.
Screw and bolt
tightening torques
Note the strength class specification for screws, nuts and bolts. Refer
to the table for the corresponding tightening torque. Securely tighten
screws, nuts and bolts to the specified values, provided that no other
value is specified. The torque specifications refer to a dry coefficient
of friction (0.12).
Tighten safety bolts and lock nuts to a 10% higher value.
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WARNING
Use original parts
Machine components have special properties that are essential
for the stability and correct operation of the machine. Only spare
parts and accessories supplied by the manufacturer have been
tested and approved. Other products may adversely affect the
correct operation of the machine and safety. The use of non-OEM
replacement parts renders the manufacturer's guarantee null and
void and frees the manufacturer from all liability.
Specification of strength class
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WARNING
Use the correct screw and bolt tightening torque
Securely tighten screws, nuts and bolts to the specified torques.
Damage to the machine and serious or fatal injury may be caused
as a result.
8.8
10.9
12.9
M 6
9.9 Nm (7.3 ft.lbs)
14 Nm (10.3 ft.lbs)
17 Nm (12.5 ft.lbs)
M 8
24 Nm (17.7 ft.lbs)
34 Nm (25 ft.lbs)
41 Nm (30.3 ft.lbs)
M 10
48 Nm (35.4 ft.lbs)
68 Nm (50.2 ft.lbs)
81 Nm (59.8 ft.lbs)
M 12
85 Nm (62.7 ft.lbs)
120 Nm (88.6 ft.lbs)
145 Nm (104 ft.lbs)
M 14
135 Nm (99.6 ft.lbs)
190 Nm (140 ft.lbs)
230 Nm (166 ft.lbs)
M 16
210 Nm (155 ft.lbs)
290 Nm (214 ft.lbs)
350 Nm (258 ft.lbs)
M 20
410 Nm (302 ft.lbs)
580 Nm (428 ft.lbs)
690 Nm (509 ft.lbs)