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TYPES OF CUTTING
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A. BASIC CUTTING TECHNIQUE
1. IMPORTANT POINTS.
a. Cut wood only. Do not cut metal, plastics,
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 of dirt will quickly dull a chain and thus, increase the possibilityof kickback.
KICKBACK WARNING
Kickback can occur when the moving chain contacts an object at the upper portion 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 guidebarcan cause the chain to dig into the object and stop the chain for an instant. The result is a lightning fast, reverse reaction which kicks the guide bar up and back toward the operator. If 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
and causes the saw to move in the oppositedirection of chain rotation. Either reaction can resultin loss ofcon-
troland possible serious injury.
•
--occurswhen 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
•
-can occur when the chain on the bottom of the bar is suddenly stopped.
-pulls the saw rapidly forward.
B.TREE FELM'NGTECHNIQUES
1.PLAN YOUR SAWING OPERATION CARE- FULLY IN ADVANCE
a.Clearthe work area. You need a clear area all around the tree where you can have secure footing.
b.Study the natural conditions that can cause thetreeto fall in a particular direction:
1 .) The WIND direction and speed.
2.) The LEAN ofthetree.
3.) WEIGHTED with BRANCHES on one side.
4.) Surrounding TREES and OBSTACLES.
c.Look for decay and rot. If the trunk is rotted, itcould snap and fall toward the operator.
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3.PROCEDURE
a.Accelerate the engine to full throttle just before entering the cut by squeezing the throttle trigger.
b. Begin cutting with the saw frame or spur against the wood. Figure 15,
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 completed, allowing the engine to idle. If you run the saw at full throttle without a cutting load, unnecessary wear can occur to the chain, bar,and engine.
f.Do not put pressure on the saw at the end of the cut to avoid losing controlwhen the cut is complete.
g.Stop the engine before setting thesaw down after cutting.
Practice cuttinga few small logs usingthe following techni- que toget the ,feel" of using your saw before you begin a major sawingoperation.
BEGIN CUTTING WITH
THE SPUR OR
SAW FRAME AGAINST
THE LOG
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Figure 15
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d. Check for broken or dead branches which could fall on you while cutting.
e, Makesure thereis enoughroom forthe treeto fall. Maintain a distance of 21/2tree lengths from the nearest person or other objects. Engine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails,
staples, and wire from the tree where cuts areto be made.
Plan to standOn the uphill side when cut- ting on a slope.
Plan a clear retreat path to the rear and diagonal to the line of fall. Figure 17.
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