Types Of Cutting; Basic Tutting Technique; Tree Felling Techniques - Sears Craftsman 358.356091 Important Manual

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TYPES OF CUTTING
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A. BASlC CUTTING TECHNIQUE
1. IMPORTANT POINTS.
a. Cut wood only. Do not cut metal, plastics,
masonry, n on-wo_ buiiomgmatedais,et_ Donor
useyoursawto pryor shoveaway limbs, rootsor
otherobjects.
b. Stop the saw if the chain strikes a foreign
object. Inspect the unit and repair or replace
parts as necessary.
_ c. Keep the chain out of dirt and sand. Even a
small amount ofdirt will quickly dull a chain and
..... thus, increase the possibilityof kickback.
A KICKBACK WARNING
Kickbackcan occur when the moving chain contacts an
object at the upper pc rtion of the tip of the guide bar or
when the wood closes in and pinches the saw chain in
the cut. Contact at the upper portion of the tip of the
guide barcan cause the chain to dig into the object and
stop the chain for an instant. The resuit is a lightning
fast, reverse reaction which kicks the guide bar up and
back toward the operator, ff the saw chain is pinched
along the top of the guide bar, the guide bar can be
driven rapidly back toward the operator. Either of these
reactions can cause loss of saw control which can
result in serious injury.
2. UNDERSTAND REACTIVE FORCES
Pinch-Kickbackand Pull-in occur when the chain
is suddenly stopped bybeing pinched, caught, or
by contacting a foreign object in the wood. This
resultsin a reversalofthe chain force used tocutwood
and causesthe saw tomovein the Opposite directionof
chain rotation.Eitherreaction can resultin lossofcon-
trql and possible serious injury.
= Pinch-Kickback
--occurs when the chain, on top of the bar issuddenly
stopped when the top of the bar is used for cutting.
--rapidly drives the saw straight back toward the
operator.
• Pull-In-
--can occur when the chain on the bottom of the
bar is suddenly stopped.
--pulls the saw rapidly forward.
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B. TREE FELLING TECHNIQUES
1. PLAN YOUR SAWING OPERATION CARE-
FULLY IN ADVANCE
a. Clear the work area. You need a clear area all
around the tree where youcan have secure
footing.
b. Study the natural conditions that can cause
the tree to fall in a particular direction:
1.) TheWIND direction and spe_d.
2.) The LEAN ofthe tree.
3.) WEIGHTED with BRANCHES on one side.
4.) SurroundingTREES and OBSTACLES.
c. Look for decay and rot. If the trunk is rotted,
it could snap and fall toward the operator.
3.
PROCEDURE
Practice cuttinga few small logsusingthefollowing techni-
que toget the "feel" of usingyour saw beforeyou begina
maior sawingoperation.
a. Accelerate the engine to full throttle just before
entering the cut by squeezing the throttle trigger.
b. Begin cutting with the spur against the log.
Figure27.
-. c. Keep the engine at full throttle the entire time you
are cutting.
d. Allow the chain to cut for you; exert only light
downward pressure. If you force the cut, damage to
the bar,chain, or engine can result. "
e. Release the throttle trigger as soon as the cut is
co ' _t. ai1_n theenn_nnt_idle if" u h_
mp ed, ..... g .... u....... yo runt]
saw at full throttle without a cutting load, unnecessai3
wear can occur to the chain, bar, and engine.
t
f. Donot put pressure on the saw atthe endof thecu.
to avoidlosingcontrolwhen the cut is complete.
g. Stop the engine before setting the saw down aftea
cutting.
/(
BEGIN CUTTING WITH THE
: _' /-/'. AGAINST LOG,.
F_ure27
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d. Check for broken or dead branches whi(
could fall on you while cutting.
e. Make sure thereis enough room for thetree
fall. Maintain a distanceof 21/2tree lengthsfro
the nearest person or otherobjects.Engine noi=
can drown out warning call.
f. Remove dirt, stones, loose bark, hall
staples, and wire from the tree where cu
are to be made:
g. Plan to stand on the up-hill side when cl
ting on a slope.
h. Plan a,,clear retreat path to the rear ar
diagonal to the line of fall. Figure 28,
t4