Husqvarna 445, 445e, 450e manual General Safety Precautions, Throttle lockout

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Throttle lockout

GENERAL SAFETY PRECAUTIONS

If the kickback is less violent or the kickback zone of the bar is closer to you the chain brake will be activated manually by the movement of your left hand.

In the felling position the left hand is in a position that makes manual activation of the chain brake impossible. With this type of grip, that is when the left hand is placed so that it cannot affect the movement of the front hand guard, the chain brake can only be activated by the inertia action.

Will my hand always activate the chain brake during a kickback?

No. It takes a certain force to move the hand guard forward. If your hand only lightly touches the front guard or slips over it, the force may not be enough to trigger the chain brake. You should also maintain a firm grip of the chain saw handles while working. If you do and experience a kickback, your hand may never leave the front handle and will not activate the chain brake, or the chain brake will only activate after the saw has swung around a considerable distance. In such instances, the chain brake might not have enough time to stop the saw chain before it touches you.

There are also certain positions in which your hand cannot reach the front hand guard to activate the chain brake; for example, when the saw chain is held in felling position.

Will my inetria activated chain brake always activate during kickback in the event of a kickback?

No. First your brake must be in working order. Testing the brake is simple, see instructions under the heading Checking, maintaining and servicing chain saw safety equipment. We recommend you do before you begin each work session. Second the kickback must be strong enough to activate the chain brake. If the chain brake is too sensitive it would activate all the time which would be a nuisance.

Will my chain brake always protect me from injury in the event of a kickback?

No. First, the chain brake must be in working order to provide the intended protection. Second, it must be activated during the kickback as described above to stop the saw chain. Third, the chain brake may be activated but if the bar is too close to you the brake might not have enough time to slow down and stop the chain before the chain saw hits you.

Only you and proper working technique can eliminate kickback and its danger.

Throttle lockout

The throttle lockout is designed to prevent accidental operation of the throttle control. When you press the lock

(A)(i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lockout both move back to their original positions. This arrangement means that the throttle control is automatically locked at the idle setting.

Chain catcher

The chain catcher is designed to catch the chain if it snaps or jumps off. This should not happen if the chain is properly tensioned (see instructions under the heading Assembly) and if the bar and chain are properly serviced and maintained (see instructions under the heading General working instructions).

115 10 81-26 Rev.2 2008-01-11

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Contents 445 445e 450e Operator′s manualKEY TO SYMBOLS Symbols on the machineSymbols in the operator’s manual Contents CONTENTSDear Customer INTRODUCTIONWhat is what on the chain saw? WHAT IS WHAT?Before using a new chain saw GENERAL SAFETY PRECAUTIONSAlways use common sense Machine′s safety equipmentPersonal protective equipment Chain brake and front hand guard8 – English Throttle lockout Right hand guard Stop switchVibration damping system MufflerCutting equipment General rulesCutting equipment designed to reduce kickback WARNING! Departure from the General information on sharpening cutting teethsharpening instructions considerably increases the risk of kickbackincreased if the depth gauge setting is General advice on adjusting depth gauge settingAdjustment of depth gauge setting Tensioning the chain445e, 450e which could lead to serious, even fatal injuries Lubricating cutting equipmentChain oil Filling with chain oilChain drive sprocket Fitting the bar and chain ASSEMBLYFitting a spike bumper Fuel FUEL HANDLINGFuelling Fuel safetyTransport and storage Long-termstorageStarting and stopping STARTING AND STOPPINGStopping WORKING TECHNIQUES Before useGeneral working instructions 24 – English Basic cutting technique Tree felling technique 12 3Clearing the trunk and preparing your retreat Felling directionFelling Directional cutsFelling cut How to avoid kickback What is kickback?Freeing a tree that has fallen badly Limbing WARNING! A majority of kickback MAINTENANCE Carburettor adjustmentGeneral Checking the inertia brake release Checking the brake triggerimmediately Muffler Starter Replacing the starter cordTensioning the recoil spring Air filter Replacing the return and drive springsFitting the starter Lubricating the bar tip sprocket Spark plugNeedle bearing lubrication Cooling system”Air Injection” centrifugal cleaning Winter useTemperature -5Cor colder Daily maintenance Maintenance scheduleWeekly maintenance Monthly maintenanceTechnical data TECHNICAL DATASaw chain filing and file gauges Bar and chain combinationsLength, inch Pitch, inchApplies to Europe only EC-declarationof conformity´z+S,¶6c¨ ´z+S,¶6c¨ Page 1151081-26 ´z+S,¶6c¨ ´z+S,¶6c¨