Poulan 545047503 Chain Brake and CKA Angle, WE do not REP, Resent and YOU should not AS

Symmetrical Guide Bar

Large Radius Tip

S 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. Low-- Kickback Chain has met kickback per- formance requirements when tested on a representative sample of chain saws be- low 3.8 cubic inch displacement specified in ANSI B175.1.

Contoured Depth Gauge

	Elongated Guard Link
	Deflects
Low--- Kickback	kickback force
	and allows wood
Chain
	to gradually ride
	into cutter

push the guide bar rapidly back toward the op- erator. Either of these events may cause you to lose control of the saw which could result in serious injury or even death. DO NOT RELY UPON ANY OF THE DEVICES BUILT INTO YOUR SAW. YOU SHOULD USE THE SAW PROPERLY AND CAREFULLY TO AVOID KICKBACK. Reduced--kickback guide bars and low--kickback saw chains reduce the chance and magnitude of kickback and are recommended. Your saw has a low kickback chain and bar as original equipment. Repairs on a chain brake should be made by an autho- rized servicing dealer. Take your unit to the place of purchase if purchased from a servic- ing dealer, or to the nearest authorized master service dealer.

STip contact in some cases may cause a light- ning fast reverse REACTION, kicking guide bar up and back toward operator.

SPinching the saw chain along the top of the

guide bar may push the guide bar rapidly back toward the operator.

SEither of these reactions may cause you to lose control of the saw which could result in serious injury. Do not rely exclusively upon devices built into your saw.

		Can Obstruct Material		WARNING:		Computed kickback
	Not a Low--- Kickback Chain
S	Front Hand Guard, designed to reduce the			angle (CKA) listed on your saw and listed in the
				CKA table below represents angle of kickback
	chance of your left hand contacting the chain
				your bar and chain		combinations will have
	if your hand slips off the front handlebar.
				when tested in accordance with CSA (Cana-
S	Position of front and rear handlebars, de-
				dian Standards Association) and ANSI stan-
	signed with distance between handles and
				dards. When purchasing replacement bar and
	“in-line” with each other. The spread and
				chain, considerations should be given to the
	“in-line” position of the hands provided by
				lower CKA values. Lower CKA values repre-
	this design work together to give balance
				sent safer angles to the user, higher values in-
	and resistance in controlling the pivot of
				dicate more angle and higher kick energies.
	the saw back toward the operator if kick-
				Computed angles represented indicate total
	back occurs.
				energy and angle associated without activation
CHAIN BRAKE AND CKA ANGLE
				of the chain brake during kickback. Activated
S Chain Brake, designed to stop the chain in
				angle represents chain stopping time relative to
	the event of kickback.
				activation angle of chain break and resulting
	WARNING:	WE DO NOT REP-		kick angle of saw. In all cases lower CKA val-
				ues represent a safer operating environment
RESENT AND YOU SHOULD NOT AS-				for the user.
SUME THAT THE CHAIN BRAKE WILL				The following guide bar and chain combina-
PROTECT YOU IN THE EVENT OF A KICK-				tions meet kickback requirements of CSA
BACK. Kickback is		a lightning fast action		Standards Z62.1, Z62.3, & ANSI B175.1
which throws the bar and rotating chain back				when used on saws listed in this manual.
and up toward the operator. Kickback can be				Use of bar and chain combinations other
caused by allowing contact of the bar tip in the				than those listed is not recommended and
danger zone with any hard object. Kickback				may not meet the CKA requirements per
can also be caused by pinching the saw chain				standard.
along the top of the guide bar. This action may
Computed kickback angle (CKA) Table
		BAR			CKA without chain brake
	MODEL	P/N	Length	CHAIN P/N
	PP4218AVHD	952044689	18″	952051338		33_
NOTE: If this saw is to be used for com-				SAFETY NOTICE: Exposure to vibrations
mercial logging, a chain brake is required				through prolonged use of gasoline powered
and shall not be removed or otherwise dis-				hand tools could cause blood vessel or nerve
abled to comply with Federal OSHA Regula-				damage in the fingers, hands, and joints of
tions for Commercial Logging.				people prone to circulation disorders or
				abnormal swellings. Prolonged use in cold
				weather has been		linked to blood vessel

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