Poulan 530163243 instruction manual Chain Brake and CKA Angle, Resent and YOU should not AS

Reduced Kickback Symmetrical Guide Bar

Small Radius Tip

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

can be caused by allowing contact of the bar tip in the danger zone with any hard object. Kickback can also be caused by pinching the saw chain along the top of the guide bar. This action may push the guide bar rapidly back toward the operator. 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. Re- duced--kickback guide bars and low--kick- back saw chains reduce the chance and magnitude of kickback and are recom- mended. 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 ser- vicing 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.

		WARNING:	Computed kickback
	Can Obstruct Material	angle (CKA) listed on your saw and listed in the
Not a Low---Kickback Chain		CKA table below represents angle of kickback
		your bar and chain combinations will have
S Front Hand Guard, designed to reduce the
		when tested in accordance with CSA (Cana-
chance of your left hand contacting the chain
		dian Standards Association) and ANSI stan-
if your hand slips off the front handlebar.
		dards. When purchasing replacement bar and
S Position of front and rear handlebars, de-
		chain, considerations should be given to the
signed with distance between handles and
		lower CKA values. Lower CKA values repre-
“in-line” with each other. The spread and
		sent safer angles to the user, higher values in-
“in-line” position of the hands provided by
		dicate more angle and higher kick energies.
this design work together to give balance
		Computed angles represented indicate total
and resistance in controlling the pivot of
		energy and angle associated without activation
the saw back toward the operator if kick-
		of the chain brake during kickback. Activated
back occurs.
		angle represents chain stopping time relative to
CHAIN BRAKE AND CKA ANGLE
		activation angle of chain break and resulting
S Chain Brake, designed to stop the chain in		kick angle of saw. In all cases lower CKA val-
the event of kickback.		ues represent a safer operating environment
WARNING: WE DO NOT REP-		for the user.
		The following guide bar and chain combina-
RESENT AND YOU SHOULD NOT AS-		tions meet kickback requirements of CSA
SUME THAT THE CHAIN BRAKE WILL		Standards Z62.1, Z62.3, & ANSI B175.1 when
PROTECT YOU IN THE EVENT OF A		used on saws listed in this manual. Use of bar
KICKBACK. Kickback is a lightning fast ac-		and chain combinations other than those listed
tion which throws the bar and rotating chain		is not recommended and may not meet the
back and up toward the operator. Kickback		CKA requirements per standard.

Computed kickback angle (CKA) Table

	BAR				CKA without chain brake
MODEL	P/N	Length		CHAIN P/N
1950/1975/2050	952044368	14!	952051209		24_
2055/2075/	952044370	16!	952051211		19_
2150/2150PR
2155/2175/	952044418	18!	952051338		14_
2350/2375

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