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Cutting methods, Warning, Disengaged engaged – Husqvarna 137 User Manual

Page 9

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9

CHAIN BRAKE

WARNING:

If the brake band is

worn too thin it may break when the chain

brake is triggered. With a broken brake band,

the chain brake will not stop the chain. The

chain brake should be replaced by an autho-

rized service dealer if any part is worn to less

than 0,5 mm thick. Repairs on a chain brake

should be made by an authorized service

dealer. Take your unit to the place of pur-

chase if purchased from a servicing dealer,

or to the nearest authorized master service

dealer.
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This saw is equipped with a chain brake.

The brake is designed to stop the chain if

kickback occurs.

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The inertia--activated chain brake is

activated if the front hand guard is pushed

forward, either manually (by hand) or

automatically (by sudden movement).

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If the brake is already activated, it is

disengaged by pulling the front hand guard

back toward the front handle as far as

possible.

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When cutting with the saw, the chain brake

must be disengaged.

Disengaged

Engaged

Braking function control

CAUTION:

The chain brake must be

checked several times daily. The engine

must be running when performing this proce-

dure. This is the only instance when the saw

should be placed on the ground with the en-

gine running.

Place the saw on firm ground. Grip the rear

handle with your right hand and the front han-

dle with your left hand. Apply full throttle by

fully depressing the throttle trigger. Activate

the chain brake by turning your left wrist

against the hand guard without releasing

your grip around the front handle. The chain

should stop immediately.

Inertia activating function control

WARNING:

When performing the

following procedure, the engine must be

turned off.

Grip the rear handle with your right hand and

the front handle with your left hand. Hold the

chain saw approximately 14” (35 cm) above

a stump or other wooden surface. Release

your grip on the front handle and use the

weight of the saw to let the top of the guide

bar fall forward and contact the stump.

When the tip of the bar hits the stump, the

brake should activate.

CUTTING METHODS

IMPORTANT POINTS

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Check chain tension before first use and af-

ter 1 minute of operation. See CHAIN TEN-

SION in the ASSEMBLY section.

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Cut wood only. Do not cut metal, plastics,

masonry, non-wood building materials, etc.

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Stop the saw if the chain strikes a foreign ob-

ject. Inspect the saw and repair or replace

parts as necessary.

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Keep the chain out of dirt and sand. Even a

small amount of dirt will quickly dull a chain

and thus increase the possibility of kickback.

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Practice cutting a few small logs using the

following techniques to get the “feel” of using

your saw before you begin a major sawing

operation.
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Squeeze the throttle trigger and allow the

engine to reach full speed before cutting.

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Begin cutting with the saw frame against

the log.

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Keep the engine at full speed the entire

time you are cutting.

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Allow the chain to cut for you. Exert only

light downward pressure. If you force the

cut, damage to the bar, chain, or engine

can result.

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Release the throttle trigger as soon as the

cut is completed, allowing the engine to

idle. If you run the saw at full throttle with-

out a cutting load, unnecessary wear can

occur to the chain, bar, and engine.

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To avoid losing control when cut is com-

plete, do not put pressure on saw at end

of cut.

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Stop the engine before setting the saw down

after cutting.

TREE FELLING TECHNIQUES

WARNING:

Check for broken or

dead branches which can fall while cutting

causing serious injury. Do not cut near build-

ings or electrical wires if you do not know the

direction of tree fall, nor cut at night since you

will not be ale to see well, nor during bad

weather such as rain, snow, or strong winds,

etc. If the tree makes contact with any utility

line, the utility company should be notified im-

mediately.
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Carefully plan your sawing operation in ad-

vance.

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Clear the work area. You need a clear area

all around the tree so you can have secure

footing.

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The chain saw operator should keep on

the uphill side of the terrain as the tree is

likely to roll or slide downhill after it is felled.

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Study the natural conditions that can cause

the tree to fall in a particular direction.