Manual Husqvarna 450 II (page 31 of 120) (English, Portuguese, Spanish)

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Daily maintenance Weekly maintenance Monthly maintenance

Sharpen the saw chain and do a

check of its tension. Refer to

sharpen the saw chain on page 33

Do a check of the chain drive sprock-

et. Refer to

To do a check of the spur

sprocket on page 35

Clean the air intake on the starter.

Make sure that nuts and screws are

tightened.

Do a check of the stop switch. Refer

To do a check of the start/stop

switch on page 32

Make sure that these are no fuel

leaks from the engine, tank or fuel

lines.

Make sure that the saw chain does

not rotate when the engine is at idle

speed.

Make sure that there is no damage

on the right hand guard.

Make sure that the muffler is correct-

ly attached, has no damages and

that no parts of the muffler are miss-

ing.

Maintenance and checks of the safety

devices on the product

To do a check of the brake band

1. Use a brush to remove wood dust, resin and dirt

from the chain brake and clutch drum. Dirt and wear

can decrease the function of the brake. (Fig. 90)

2. Do a check of the brake band. The brake band must

be at a minimum of 0.6 mm/0.024 in thick at its

thinnest point.

To do a check of the front hand guard and the

chain brake activation

1. Make sure that the front hand guard is not damaged

and that there are no defects, such as cracks.

2. Make sure that the front hand guard moves freely

and that it is attached safely to the clutch cover. (Fig.

91)

3. Hold the product with 2 hands above a stump or

other stable surface.

WARNING: The engine must be off.

4. Let go of the front handle and let the guide bar tip fall

against the stump. (Fig. 92)

5. Make sure that the chain brake engages as the

guide bar tip hits the stump.

To do a check of the chain brake

1. Start the product. Refer to

To start the product on

page 26

for instructions.

WARNING: Make sure that the saw

chain does not touch the ground or other

objects.

2. Hold the product tightly.

3. Apply full throttle and tilt your left wrist against the

front hand guard to engage the chain brake. The

saw chain must stop immediately. (Fig. 93)

WARNING: Do not let go of the front handle.

To do a check of the throttle trigger and

throttle trigger lockout

1. Make sure that the throttle trigger and throttle trigger

lockout move freely and that the return spring works

correctly. (Fig. 94)

1286 - 002 - 03.06.2020 31

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Husqvarna 450 II Manual

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