Craftsman 358.351080 manual Safety Rules, Reduce The Chance Of Kickback, Kickback Safety Features

k

SAFETY RULES

"'2";

Ha ! Under Side Of

_ Handlebar

Elbow

_ Locked "'_

lstand

t Of The Saw

Figure4

REDUCE THE CHANCE OF KICKBACK

•Recognize that kickback can happen. With a basic understandingof kicl_ack,you can reduce the element of surprisewhichcontributesto accidents.

*Never let the moving chaincontact any object at the tip of the guide bar. Figure2.

. Keep the working area free from obstructions such as other trees, branches,rocks,fences,stumps,etc.Figure3. Eliminate or avoidany obstructionthat your chain couldhit while you are cuttingthrougha particularlog or branch.

,Keep your chain sharp and properly tenaioned.A loose or dull chaincan increasethe chance of kickbackto occur. Follow manufacturer'schainsharpeningand maintenance instructions.Check tension at regular intervals with the engine stopped,neverwith the engine running.Make sure

the bar clamp nutsare securelytightenedafter tensioning the chain.

•Begin and continue cutting at full throttle. If the chain is

moving at a slowerspeed,there is greaterchance for kick- back to occur.

•Cut one log at a time.

•Use extreme caution when re-entering a previous cut.

•Do not attempt plunge cuts.

•Watch for shifting logs or other forcesthat could close a cut and pinch or fall intochain.

°Use the Reduced-Kickback Guide Bar and Low- Kickback Chain specked for yoursaw.

KICKBACK SAFETY FEATURES

THE FOLLOWING FEATURES ARE INCLUDED

_ WARNING:

ON YOUR SAW TO HELP REDUCE THE HAZ-

ARD OF KICKBACK; HOWEVER, SUCH FEA- TURES 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 MAIN- TENANCE IN THIS MANUAL TO HELP AVOID

KICKBACK AND OTHER FORCESWHICH CAN RESULT IN SERIOUS INJURY.

Reduced-Kickback Guide Bar, designed with a sma radius tip,which reduces the size of the kickback danger

zone on me guioe par tip. Figure 5, A Reduced-Kickback

Guide Bar is one which has been demonstrated to signif- icantly reduce the number and seriousness of kickbacks

when tested in accordance with ANSI B175.t-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 5. 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

MAINTAIN CONTROL

•Keep a good, firm grip on the saw with both hands when the engine is running and don'tlet go. Figure4. A firm grip can neutralize kickback and help you maintain controlof the saw. Keep the fingersof your left hand encir- cling and your left thumb under the front handlebar.Keep your righthand completely around the rear handle whether you are right handed or left handed. Keep your left arm straight withthe elbow locked,

•Position your left hand on the front handlebar so it is in a sl_aight line with your right hand on the rear harp die when making bucking cuts. Figure4. Never reverse right and left hand positionsfor any type ofcutting.

•Stand with your weight evenly balanced on both feel

•Stand slightly to the left side of the saw to keep your body from being in a direct line with the cutting chain. Figure4.

•Do not overreach. You couldbe drawnor thrown offbal- ance and lose control of the saw.

•Do not cut above shoulder heighL It is difficult to main- taincontrol of saw above shoulderheight.

UNDERSTANDING REACTWE FORCES

Pinch-Kickback and Puff-In occur when the chain is sud- denly stopped by being pinched, caught, or by contact-

ing a foreign object in the wood.This stoppingof the chain resultsin a reversal of the chain force used to cut wood and

causesthe saw to move in the oppositedirectionof thechain rotationEither. reaction can resultin loss of control and pos-

sibleseriousinjury.

• Pinch-Kickback

-occurs when chain on top of guide bar is suddenly stopped.

-rapidlyd/_vessaw straightback towardoperator.

•PulHn

-occurswhen the chain on the bottomof the guide bar is suddenlystopped.

-pulis the saw rapidly forward.

inchdisplacement specified in ANSI B175.1-1991. Handguard, designed to reduce the chance of your left

hand contactiQgthe.chain if your hand slipsoff the front handlebar,

Position of front and rear handlebars, designed with distance between handles and =in-line"with each other.

The spreadand =in-line"positionof the handsprovided by this design work together to give balance and resistance

in centmlling the pivot of the saw back toward the opera- tor if kickbackoccurs.

ANS! B175.1-1991 - Safety requirements for gasotine powered chain

saws as set by the ._nedcan NaSor_l Standards Institute, inc., Standard B175.1-1991.

			2 ._	Dep_ Gauge	Ek:ng_
ReducedlGdd_ck		Rad{usT_)	Lo_-KL_Ee_	_ To Gra_lualty Ride
_nf_tettP..af	G_i_} Bar		Chain	l_to C_ter
{				Male_l
Sym_etricat		Large	C_ain	With H_gh
Guide Bat		Rad;u$ T'=p	Kick_¢_	Poter_ia_

Figure 5

-4-