V Range 502 l652 l802 Maintenance Manual
MA1:4 Chapter - Scheduled Maintenance
Security of Equipment
As part of the maintenance programme it is recommended to check the security of various components
(see ‘B’ Service in Operators Guide).
HS-031
FA-0051 Tightening Torque
Bolts with metric coarse thread Bolts with metric fine thread
Zinc Plated or Dacromet Bolts/setscrews & Nuts (Friction coefficient 0.12 assembled dry) or
Stainless Steel (Friction coefficient 0.1 assembled lubricated with Molycote grease)
Generally bolts and nuts of the same grade material are used together.
Property Class
Thread 8.8 Steel 10.9 Steel
12.9 Steel
M 8 x 1 25 Nm 35 Nm 45 Nm
M 10 x 1,25 50 Nm 75 Nm 85 Nm
M 12 x 1,25 90 Nm 135 Nm 155 Nm
M 12 x 1,5 90 Nm 125 Nm 150 Nm
M 14 x 1,5 140 Nm 205 Nm 245 Nm
M 16 x 1,5 215 Nm 320 Nm 370 Nm
M 18 x 1,5 325 Nm 460 Nm 545 Nm
M 20 x 1,5 450 Nm 645 Nm 755 Nm
M 22 x 1,5 610 Nm 870 Nm 1020 Nm
M 24 x 2 765 Nm 1095 Nm 1280 Nm
M 27 x 2 1150 Nm 1600 Nm 1950 Nm
M 30 x 2 1600 Nm 2250 Nm 2700 Nm
Property Class
Thread
4.8/5.6 Steel 8.8 Steel
A1- 50 S/S
10.9 Steel
A2-70 S/S
12.9 Steel
A4- 80 S/S
0.13 Nm 0.35 Nm 0.5 Nm 0.6 Nm
M 2
0.1 Nm 0.23 Nm 0.3 Nm
0.60 Nm 1.3 Nm 1.8 Nm 2.1 Nm
M 3
0.4 Nm 0.8 Nm 1.1 Nm
1.4 Nm 3.0 Nm 4.5 Nm 5.0 Nm
M 4
0.86 Nm 1.85 Nm 4.0 Nm
2.8 Nm 6 Nm 8.5 Nm 10 Nm
M 5
1.6 Nm 3.6 Nm 4.8 Nm
4.3 Nm 10 Nm 16 Nm 20 Nm
M 6
2.9 Nm 6.3 Nm 8.5 Nm
11.5 Nm 25 Nm 35 Nm 40 Nm
M 8
7.1 Nm 15 Nm 20 Nm
23 Nm 48 Nm 70 Nm 80 Nm
M 10
14 Nm 30 Nm 40 Nm
40 Nm 84 Nm 120 Nm 140 Nm
M 12
24 Nm 50 Nm 70 Nm
60 Nm 135 Nm 195 Nm 230 Nm
M 14
38 Nm 82 Nm 110 Nm
95 Nm 205 Nm 300 Nm 355 Nm
M 16
58 Nm 125 Nm 165 Nm
130 Nm 290 Nm 420 Nm 485 Nm
M 18
82 Nm 175 Nm 235 Nm
185 Nm 410 Nm 580 Nm 680 Nm
M 20
115 Nm 245 Nm 375 Nm
250 Nm 560 Nm 800 Nm 940 Nm
M 22
157 Nm 337 Nm 450 Nm
320 Nm 710 Nm 1000 Nm 1180 Nm
M 24
1050 Nm 1480 Nm 1750 Nm
M 27
1420 Nm 2030 Nm 2380 Nm
M 30
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Version 00 25/10/2010
These torques apply unless specified on the drawing.
For steel bolts used in conjunction with aluminium parts the
follwing rule applies:
Use the next lower value from the column for property class 10.9.
This directive is valid for all thread diameters and grades.
(e.g. M10 grade 10.9 bolt clamping aluninium parts should be
torque to 35 Nm not 70 Nm)
