Yamaha WaveRunner VXR VX1800A, Service Manual

Page: 53 / 318

Specified tightening torque
2-12
Specified tightening torque
Specified tightening torques are provided for
specific nuts, bolts, and screws. Tightening
torque specifications are provided in the ex-
ploded diagrams and in the related detailed in-
structions. When tightening these fasteners,
follow the tightening torque specifications indi-
cated throughout the manual to meet the de-
sign aims of the watercraft.
Torque wrench reading (setting
value)
The correct setting value of the torque wrench
varies depending on its length.
When tightening bolts, nuts, or parts using the
SST as an extension to the torque wrench, use
the following calculation formula to obtain the
correct setting value.
When tightening bolts, nuts, or parts using
an extension to the torque wrench, do not
set the torque wrench to the specified tight-
ening torque. If an extension is attached to
the torque wrench, the actual tightening
torque will be greater than the setting value
on the torque wrench.
Torque wrench setting value
= T ÷ (A m + B m)
×
B m
General tightening torque
This chart indicates the tightening torques for
standard fasteners with a standard ISO thread
pitch.
T Specified tightening torque (Nm)
A m SST length (m)
B m Torque wrench length (m)
B m A m
Width
across
flats (A)
Thread
size (B)
General torque speci-
fications
Nm kgf·m ft·lb
8 mm M5 5 0.5 3.7
10 mm M6 8 0.8 5.9
12 mm M8 18 1.8 13.3
14 mm M10 36 3.6 26.6
17 mm M12 43 4.3 31.7