Craftsman 358.351080 - Manual (Page 4)

SAFETY RULES
Never Reverse
Hand Positions
Thumb On
Under Side Of
Handlebar
Elbow
Locked
Stand To
The Left
Of The Saw
Figure 4
REDUCE THE CHANCE OF KICKBACK
• Recognize ttiat kickback can happen. With a basic
understanding of kio№ack, you can reduce the element of
surprise which contributes to accidents.
• Never let the moving chain contact any object at the flp
of the guide bar. Figure 2.
• Keep ^ woiidng area free from obstructions such as
other trees, branches, roci<s, fences, stumps, etc. Figures.
Eiitninate or avoid any obstruction that your chain could hit
v/htie you are cutting through a particular log or branch.
• Keep your chain sharp and property tensioned. A loose
or dull chain can increase the chance of kic^cback to occur.
Follow TOnufacturer’s chain sharpening and mantenance
instructions. Check tension at regular intervals with the
engine slopped, never with the engine running. Make sure
the bar clamp nuts are securely tightened after tensioning
the chain.
• Begin and continue cutting at full ttirottle. If the chain is
mowng at a slower speed, there is greater chance for kfdc-
back to occur.
' Cut one log at a time.
' Use extreme caution when re-entering a previous cut.
’ Do not attempt plunge cuts.
' Watdi for shifting logs
or other forces that could close a
cut and pinch or fall into chain.
Use
the Reduced-Kickback Guide Bar and Low-
Ktckbadc Chain speeded for your saw.
MAINTAIN CONTROL
• Keep a good, finn grip on the saw with both hands
when the engine is running and don’t let go. Rgure 4.
A firm grip can neutralize kickback and he^ you maintain
control of the saw. Keep the fingers of your left hand encir-
ding and your left thumb under the front handlebar. Keep
your right hand comptetety around the rear handle whether
you are right handed or left handed. Ifeep >our left arm
straight vrith the elbow locked.
• Position your left hand on the front handlebar so it is
in a sbaight line with your right hand on the rear han­
dle when mafdng bucMng cuts. Figure 4. Never reverse
right and left hand positions for any tjpe of cutting.
• Stand with your weight evenly taianced on both feet
• Stand slightly to the left side of toe saw to keep your
body from being in a direct line vnth toe cutting chain.
Figure 4.
• Do not overreach. You could be drawn or thrown off bal­
ance and tose control of the saw.
• Do not cut above shoulder he^ht It is difflojft to main­
tain control of saw above shoulder height
UNDERSTANDING REACTIVE FORCES
Pindi-Kickback and Pull-In occur when tire chain is sud-
derdy stopped by being pinched, caught, or by contact­
ing a foreign object in the wood.
This stopping of the chain
results in a reversal of the chain force used to cut wood and
causes the saw to move in the opposite direction of tiie chain
rotation. Either reaction can resuit in toss of control and pos­
sible serious injury.
• PindvKickbadc
- occurs when chain on lop of guide bar is suddenly
stopped.
- rap/y/y drives saw straight bad< toward operator.
• PulHn
- occurs when the chain on the bottom of the guide bar is
suddenly stopped.
- pulls the saw rapidly forward.
KICKBACK SAFETY FEATURES
A
WARNING:
THE FOLLOWING FEATURES ARE INCLUDED
ON YOUR SAW TO HELP REDUCE THE HAZ­
ARD OF KICKBACK; HOWEVER, SUCH FEA­
TURES WILL NOT TOTALLY EUMINATE THIS
DANGEROUS REACTION. AS A CHAIN SAW
USER, DO NOT RELY ONLY ON SAFETY
DEVICES. YOU MUST FOLLOW ALL SARETY
PRECAUTIONS, INSTRUCTIONS, AND MAIN­
TENANCE IN THIS MANUAL TO HELP AVOID
KICKBACK AND OTHER FORCES WHICH CAN
RESULT IN SERIOUS INJURY.
inch displacement specified in ANSI B175.1-1991.
’ Handguard, designed to reduce the chance of your left
hand contactiog the.chain if your hand siips off the front
handlebar.
Position of front and rear handlebars,
designed with
distance between handles and “in-line" wth each other.
The spread and “iri-line" position of the hands provided
this design work together to give balance and resistance
in contioliing the pivot of the saw back toward the opera­
tor if kickback occurs.
ANSI B175.1-1991 — Saiety requireinonts for gasoline powered chain
saws as set by the American Nation^ Siandands Institute, inc.,
StarKiaiT!B175.1-1991.
' Reduced-Kicitoack Guide Bar, designed with a small
radius tip which reduces the size of the' kickback danger
zorie on the guide bar tip. Rgure 5. A Reduced-Kickback
Guide Bar is one which has been demonstrated to signif­
icantly reduce toe number and seriousness of kickbacks
when tested in accordance with ANSI B175.1-1991.
Low-Kickback
Chain, designed with a contoured depth
gauge and guard link which deflect kickback force and
allow wood to gradually ride into the cutter. Figure S. Low-
Kickback Chain is chain which has met kickback perfor­
mance requirements of ANSI B175.1-1991 when tested
on a representative sample of chain saws below 3.8 cubic
fta^iuceii iGckbiick
Symmefneaf Gukde Bar
Senatr
Radius Tip
Contoured
Odp№ Gaugo Flongatad
^GuideUnlc
Oedecte
Kidcbadk Force
Aid Allows Wood
ToGraduaftyRkfe
tnfo Cutter
Obstruct
Material
Chain With HI01
Kk^bacfc Foter^tai
Figure 5