Magni RTH 4.18, Use And Maintenance Manual

Page: 79 / 127

MAINTENANCE 79
MAINTENANCE
General information
Tightening torques
Unsuitable bolts or those of incorrect size can cause
damage, faults and injuries.
Take care to avoid mixing metric nuts and bolts with
nuts and bolts in inches.
The tightening torques shown below are meant as
general reference. Exceptions are indicated on a case by
case basis.
Before fitting any component, make sure it is as good
as new. Bolts and threads must not be worn or
damaged. The threads must not have burrs or be
chipped.
The components must not be rusty or corroded.
Clean the components with a non corrosive detergent.
Do not grease the threads of the bolts unless
otherwise specified.
Metric nuts and bolts
Diameter Tightening torque
M6 12 ± 3 Nm
M8 28 ± 7 Nm
M10 55 ± 10 Nm
M12 100 ± 20 Nm
M14 160 ± 30 Nm
M16 240 ± 40 Nm
M20 460 ± 60 Nm
M24 800 ± 100 Nm
M30 1600 ± 200 Nm
M36 2700 ± 300 Nm
Nuts and bolts in inches
Diameter Tightening torque
1/4 12 ± 3 Nm
5/16 25 ± 6 Nm
3/8 47 ± 9 Nm
7/16 70 ± 15 Nm
1/2 105 ± 20 Nm
9/16 160 ± 30 Nm
5/8 215 ± 40 Nm
3/4 370 ± 50 Nm
7/8 620 ± 80 Nm
1 900 ± 100 Nm
1 1/8 1300 ± 150 Nm
1 1/4 1800 ± 200 Nm
1 3/8 2400 ± 300 Nm
1 1/2 3100 ± 350 Nm
Tube clamps
For fitting on a new tube:
Width Tightening torque
7.9 mm 0.9 ± 0.2 Nm
13.5 mm 4.5 ± 0.5 Nm
15.9 mm 7.5 ± 0.5 Nm
For a second assembly:
Width Tightening torque
7.9 mm 0.7 ± 0.2 Nm
13.5 mm 3.0 ± 0.5 Nm
15.9 mm 4.5 ± 0.5 Nm