Echo DCS-2500TN Operator's Manual page 49

DCS-2500TN
Tension and Compression in Timber
If you have misjudged the effects of tension and compression,
and cut from the wrong side, the timber will pinch the guide bar
and chain, trapping it. If the chain should become jammed and
the saw can not be removed from the cut do not force it out. Stop
the saw, force a wedge into the cut to open it up. Never force the
saw when it is jammed. Do not force the saw into the cut. A dull
chain is unsafe and will cause excessive wear to the cutting
attachments. A good way to tell when the chain is dull is when
fine saw dust comes out instead of chips.
A length of timber lying on the ground will
be subject to tension and compression,
depending at which points the major
support is. When timber is supported at
its ends the compression side is at the
top and the tension side is at the bottom.
To cut between these support points,
make the first cut downwards
approximately 1/3rd the timber diameter.
The second cut is made upwards and
should meet the first cut. (1. hinge, 2.
open, 3. closed)
Heavy Stress
When the timber is supported at
one end only, make the first cut
upwards approximately 1/3rd the
timber diameter. The second cut is
made downwards and should meet
the first cut. (4. 1/3 diameter to
avoid split, 5. weakening cut to
finish)
X7508220500
© 7/23 ECHO Incorporated
OPERATION
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