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8.9
Checking tightness of fastening bolts
Note
Replace damaged headless bolts with new bolts of the same type and strength class.
Switch off the power supply to the drive unit. Check all fastening bolts for tightness using a
torque wrench.
The general tolerance for the tightening torque is 10 %. The tightening torque is based on a
friction coefficient of μ = 0.14.
Table 8- 9
Thread size
M4
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
8.10
Inspecting the gearbox
Carry out a scheduled inspection of the gearbox once a year in accordance with the possible
criteria listed in General notes about maintenance work (Page 65).
Check the gearbox in accordance with the criteria set out in General information and safety
notes (Page 7).
Touch up damaged paintwork carefully.
BA 2030
Operating Instructions, 11/2017, A5E37880173A/RS-AE
ATEX version gearboxes
Loose parts can cause sparks through impact.
Entry of foreign bodies can cause sparks.
Tightening torques for fastening bolts
Tightening torque for strength class
8.8
[Nm]
3
6
10
25
50
90
210
450
750
1 500
2 500
Service and maintenance
8.9 Checking tightness of fastening bolts
10.9
[Nm]
4
9
15
35
70
120
295
580
1 000
2 000
3 600
12.9
[Nm]
5
10
18
41
85
145
355
690
1 200
2 400
4 200
85
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