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SAFETY RULES
,i,Ji,J,i
Never Reverse
Hand Positions
t
t
!
Stand To
The Left
Of The Saw
Elbow
Locked
Thumb On
Under Side Of
Handlebar
Figure 4
REDUCE THE CHANCE OF KICKBACK
. Recognize that kickback can happen, With a basic
understanding of kickback, you can reduce the element
of surprise which contributes to accidents.
* Never let the moving chain contact any object at the
tip of the guide bar. Figure 2.
, Keep the working area free from obstructions such
as other trees, branches, rocks, fences, stumps, etc
Figure 3. Eliminate or avoid any obstruction that your
chain could hit while you are cutting through a particular
fog or branch.
, Keep your chain sharp and properly tensioned. A
tooseor dut! chaincan increasethe chance of kickback
to occur. Follow manufacturer's chain sharpening and
maintenance instructions° Check tension at regular in-
tervals with the engine stopped, never with the engine
running. Make sure the bar clamp nuts are securely
tightened after tensioning the chain°
o Begin and continue cutting at full throttle. If the
chain is moving at a slower speed, there is greater
chance for kickback to occur,
, Cut one log at a time.
o Use extreme caution when re-entering a previous
cut.
Do not attempt plunge cuts.
. Watch 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-
Kickback Chain specified for your saw°
MAINTAIN CONTROL
- Keep a good, firm grip on the saw with both hands
when the engine is running and don't let go. Figure
4oA firm grip can neutralize kickback and help youmain-
tain control of the saw. Keep the fingers ofyour left hand
encircling and your left thumb under the front handlebar
Keep your right hand completely around the rear handle
whether you are right handed or left handed, Keep your
left arm straight with the elbow locked°
- Position your left hand on the front handlebar so it
is in a straight line with your right hand on the rear
handle when making bucking cuts° Figure 4 Never
reverse right and left hand positions for any type of cut_
ting.
o Stand with your weight evenly balanced on both
feet.
* Stand slightly to the left side ofthe saw to keep your
body from being in e direct line with the cutting
chain. Figure 4_
- Do not overreach. You could be drawn or thrown off
balance and lose control of the saw,
, Do not cut above shoulder height. It is difficult to
maintain control of saw above shoulder height,
UNDERSTANDING REACTIVE FORCES
Pinch-Kickback and Pull-In occur when the chain is
suddenly stopped by being pinched, caught, or by
contacting a foreign object in the wood. This stopping
of the chain resultsin a reversal ofthe chain force used to
cut woodand causesthesaw tomove in theopposite direc-
tion of the chain rotation, Either reaction can result in Ioss
of control and possible serious injtJry.
o Ptnch-Klckback
- occurs when chain on top of guide bar is suddenly
stopped,
- rapidly drives saw straight back toward operator.
, Pull-In
- occurs whenthe chain on the bottom of the guide bar
issuddenly stopped.
- pulls the saw rapidly forward.
KICKBACK SAFETY FEATURES
& WARNgNGTHE FOLLOWING FEATURES ARE IN-
CLUDED ON YOUR SAW TO HELP REDUCE
THE HAZARD OF KICKBACK; HOWEVER,
SUCH FEATURES WILL NOT TOTALLY
ELIMINATE THIS DANGEROUS REACTION.
AS A CHAIN SAW USER, DO NOT RELY
ONLY ON SAFETY DEVICES. YOU MUST
FOLLOW ALL SAFETY PRECAUTIONS,
INSTRUCTIONS, AND MAINTENANCE IN
THIS MANUAL TO HELP AVOID KICKBACK
AND OTHER FORCES WHICH CAN RESULT
IN SERIOUS INJURY.
Reduced-KickbackGuideBar,designedwithasmall radius
tipwhich reducesthesize ofthe kickbackdangerzone onthe
guidebartip, Figure5. A Reduced-KickbackGuideBar isone
whichhasbeen demonstratedto significantlyreducethenum-
ber and seriousnessof kickbackswhen testedin accordance
withANSl B175,1, 1991
• Low-Kickback Chain, designed with a contoured depth
gauge and guard linkwhich deflect kickbackforce and allow
woodtograduallyrideintothecutter Figure5. Low-Kickback
Chainischain whichhas metkickback performancerequire-
mentsofANSI B175.1-!991 whentestedon a representative
sample ofchainsawsbelow3,8cubic inchdisplacementspe-
cified in ANSI S17&I-1991
,, Handguard, designedto reducethechance ofyourleft hand
contactingthe chainifyour hand slips offthefront handlebar,
• Positionof front and rear handlebars designed with dis_
tance between handes and "in*line" with each other., The
spreadand "in-line"positionof thehandsprovdad bythis de-
sign work togetherto give balanceand resistance incontrol-
lingthepivot ofthe saw back toward the operatorif kickback
OCCURS,
• ANSI B175.1-1991 - Safety requirements for gasoline powered chain
saws as set by the American National Standards Institute, Inc, Stan-
dard ei75.1-1991.
Reduced K_ckbeck Smelt
Symmetrical Guide BBr Red}_J_ _p
Symmetrical t_tr_e
G_Ido Bar Red,us Tip
Cohtogfed
,_* Depth G4_uge _,
._" _ _ongstQe
__ G*Jerd L_tlk
l°°'°°"
Kl_kb_¢k Fot_
ck And Allr_ws Wood
Ch_irt \ TO Gradually Rllfe
Snto Cu{_er
'_"'_ on Obsltucl
Mste_tal
Chrtirl Wi_h H$£h
Kickback Potetllle$
Figure 5
-4-
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