Manual Husqvarna 236 (page 20 of 464) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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MAINTENANCE

20 – English

1153134-26 Rev. 3 2010-02-11

Checking, maintaining and

servicing chain saw safety

equipment

Chain brake and front hand guard

Checking brake band wear

Brush off any wood dust, resin and dirt from the chain

brake and clutch drum. Dirt and wear can impair operation

of the brake. (46)

Regularly check that the brake band is at least 0.6 mm

thick at its thinnest point.

Checking the front hand guard

Make sure the front hand guard is not damaged and that

there are no visible defects such as cracks.

Move the front hand guard forwards and back to make sure

it moves freely and that it is securely anchored to the clutch

cover. (47)

Checking the inertia brake release

Place the chain saw, with the engine switched off, on a

stump or other stable surface. Release the front handle

and let the saw fall by its own weight, rotating around the

rear handle towards the stump.

When the bar hits the stump the brake should be

applied. (48)

Checking the brake trigger

Place the chain saw on ﬁrm ground and start it. Make sure

the chain does not touch the ground or any other object.

See the instructions under the heading Start and stop.

Grasp the chain saw ﬁrmly, wrapping your ﬁngers and

thumbs around the handles.

Apply full throttle and activate the chain brake by tilting your

left wrist forward onto the front hand guard. Do not let go of

the front handle. The chain should stop immediately.

Throttle lockout

• Make sure the throttle control is locked at the idle setting

when the throttle lockout is released.

• Press the throttle lockout and make sure it returns to its

original position when you release it.

• Check that the throttle control and throttle lockout move

freely and that the return springs work properly.

• Start the chain saw and apply full throttle. Release the

throttle control and check that the chain stops and

remains stationary. If the chain rotates when the throttle

control is in the idle position you should check the

carburettor idle adjustment.

Chain catcher

Check that the chain catcher is not damaged and is ﬁrmly

attached to the body of the chain saw.

Right hand guard

Check that the right hand guard is not damaged and that

there are no visible defects, such as cracks.

Vibration damping system

Regularly check the vibration damping units for cracks or

deformation.

Make sure the vibration damping units are securely

attached to the engine unit and handle unit.

Stop switch

Start the engine and make sure the engine stops when you

move the stop switch to the stop setting.

Mufﬂer

Never use a machine that has a faulty mufﬂer. Regularly

check that the mufﬂer is securely attached to the machine.

Note: The spark arrestor screen (A) on this machine is

serviceable. (49) The mesh must be replaced if it is

damaged. If the mesh is blocked the machine will overheat

and this will cause damage to the cylinder and piston.

Never use a machine with a mufﬂer that is in poor

condition. Never use a mufﬂer if the spark arrestor

mesh is missing or defective.

For normal homeowner use, the mufﬂer and spark

arresting screen will not require replacement. After 75

hours of use, we recommend that your mufﬂer be replaced

by your authorized Husqvarna service dealer.

Air ﬁlter

The air ﬁlter must be regularly cleaned to remove dust and

dirt in order to avoid:

• Carburettor malfunctions

• Starting problems

• Loss of engine power

• Unnecessary wear to engine parts.

• Excessive fuel consumption.

• Remove the air ﬁlter (3) after taking off the cylinder

cover, screw (1) and ﬁlter cover (2). When reﬁtting make

sure that the air ﬁlter seals tightly against the ﬁlter

holder. Clean the ﬁlter by brushing or shaking it. (50)

The ﬁlter can be cleaned more thoroughly by washing it in

water and detergent.

An air ﬁlter that has been in use for a long time cannot be

cleaned completely. The ﬁlter must therefore be replaced

with a new one at regular intervals. A damaged air ﬁlter

must always be replaced.

A HUSQVARNA chain saw can be equipped with different

types of air ﬁlter according to working conditions, weather,

season, etc. Contact your dealer for advice.

Spark plug

The spark plug condition is inﬂuenced by:

• Incorrect carburettor adjustment.

• An incorrect fuel mixture (too much or incorrect type of oil).

• A dirty air ﬁlter.

These factors cause deposits on the spark plug electrodes,

which may result in operating problems and starting

difﬁculties.

If the machine is low on power, difﬁcult to start or runs

poorly at idle speed: always check the spark plug ﬁrst

before taking any further action. If the spark plug is dirty,

clean it and check that the electrode gap is 0.5 mm. The

spark plug should be replaced after about a month in

operation or earlier if necessary.

Note! Always use the recommended spark plug type! Use

of the wrong spark plug can damage the piston/cylinder.

Check that the spark plug is ﬁtted with a suppressor.

Note! All service and repair work on the machine

demands special training. This is especially true of the

machine’s safety equipment. If your machine fails any

of the checks described below we recommend that you

take it to your service workshop. Any maintenance

other than that described in this manual must be

carried out by your servicing dealer (retailer).

Switch off the engine and take off the ignition cable

before repairs or maintenance

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Husqvarna 236 Manual

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