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Service and maintenance
8.8 Inspecting the gearbox
The general tolerance for the tightening torque is 10 %. The tightening torque is based on a
friction coefficient of μ = 0.14.
Table 8- 6
Thread size
M4
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
8.8
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 41).
Check the gearbox in accordance with the criteria set out in General information and safety
notes (Page 9).
Touch up damaged paintwork carefully.
56
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
10.9
[Nm]
4
9
15
35
70
120
295
580
1 000
2 000
3 600
Operating Instructions, 10/2016, A5E38123453A/RS-AB
12.9
[Nm]
5
10
18
41
85
145
355
690
1 200
2 400
4 200
BA 2515
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