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16.Before use
■Check followings before using the Super Power Wrench.
16-1. Selecting Suitable Model
Check the instructions on nut and bolt torque before tightening.
When the torque is NOT noted, check with the manufacturer or decide on the
torque referring to the instructions that come with the screws.
Reference
T=K･D･N
T：Torque (N･m)
K：Torque coefficient
D：Bolt shaft diameter (mm) N：Axial tension (kN)
Caution for Loosening
It is often the case that more than double of tightening torque is needed for
loosening, due to gathered rust or deteriorated threads.
When tightening torque is about the same as the max, output torque of the
wrench, it may not be able to loosen bolt/nut. In that case, it is better to use
models with a bigger torque range.
In case the rust is heavy, apply penetrating type lubricant, below on threads
and wait approximately 10 minutes before loosening.
Do not forget to wipe out lubricant completely before re-tightening to prevent
bolt from being come loose.
16-2. Inspection
Check that there is no obvious deformation of the wrench, reaction arm,
socket, and other accessories.
Do not use the product if there are any abnormalities.
Make sure that the reaction arm is properly fastened with hexagon socket
head cap screws.
If not, tighten the screws with the attached hexagonal L wrench.
For more information, see
“
Changing parts
”
(
➭
P.42).
16-3. Selecting a Socket
To prevent the unit from falling over, attach the socket compatible with
the nuts and bolts you are using.
