Other Uses For Torque Wrench Extension Tools; Tightening Torque Specifications (Metric) - Doosan DX140R Shop Manual

and torque
inaccurate:
• If the extension itself absorbs some of the tightening
force and starts to bend or bow out.
• If an extension has to be fabricated that is not
perfectly straight (for example, an extension made to
go around an obstruction, to allow access to a difficult
to tighten fastener), the materials and methods used
must be solid enough to transmit full tightening
torque.
Other Uses for Torque Wrench Extension
Tools
Torque wrench extensions are sometimes made up for reasons
other than increasing leverage on a fastener.
For example, a torque wrench and extension can be used to
measure adjustment "tightness" of a linkage or assembly.
Specially fabricated extensions can be used to make very
precise checks of the force required to engage or disengage a
clutch mechanism, release a spring-applied brake assembly, or
"take up" free play in most any movable linkage.
Once the value of the adjustment force is established, repeated
checks at regular intervals can help to monitor and maintain
peak operating efficiency. These types of adjustment checks are
especially useful if physical measurements of linkage travel are
difficult to make or will not provide the needed degree of
precision and accuracy.
To allow the assembly or mechanism to accept a torque wrench,
welding a nut or other adapter on the end of a linkage shaft or
other leverage point will allow turning the shaft or assembly
manually.

Tightening Torque Specifications (Metric)

(For coated threads, prelubricated assemblies.)
Standard Torques
wrench. Readings may also be
SP000813
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