Husqvarna LB 448S. Профи 9678633-01 - Инструкция по эксплуатации - Страница 14

WARNING: 

Use protective gloves when you

do maintenance on the cutting equipment.

The blade is very sharp and cuts can easily

occur.

1. Examine the cutting equipment for damage or

cracks. Always replace a damaged cutting

equipment.

2. Look at the blade to see if it is damaged or blunt.

Note: 

It is necessary to balance the blade after it is

sharpened. Let a service center sharpen, replace and

balance the blade. If you hit an obstacle that causes the

product to stop, replace the damaged blade. Let the

service center estimate if the blade can be sharpened or

must be replaced.

To replace the blade

1. Lock the blade with a block of wood.(Fig. 33 )
2. Remove the blade bolt, the spring washer and the

blade.(Fig. 34 )

3. Examine the blade support and blade bolt for

damages.
a) If you replace the blade or the blade support,

also replace the blade bolt, the spring washer

and the friction washer.

4. Examine the engine shaft to make sure that it is not

bent.

5. When you attach the new blade, make sure that the

bent ends point in the direction of the cutting cover.

(Fig. 35 )

6. Put the friction washer and the blade against the

blade support.(Fig. 36 )

7. Make sure that the blade aligns with the center of the

engine shaft.(Fig. 37 )

8. Lock the blade with a block of wood.(Fig. 38 )
9. Attach the spring washer and tighten the bolt with a

torque of 80 Nm.(Fig. 39 )

10. Pull the blade around by hand and make sure that it

turns freely.

WARNING: 

Use protective gloves. The

blade is very sharp and cuts can easily

occur.

11. Start the product to do a test of the blade. If the

blade is not correctly attached, there is vibration in

the product or the cutting result is unsatisfactory.

To do a check of the oil level

CAUTION: 

A too low oil level can do

damage to the engine. Do a check of the oil

level before you start the product.

1. Put the product on level ground.

2. Close the fuel valve.
3. Remove the oil tank cap with the attached dipstick.
4. Clean the oil from the dipstick.
5. Put the dipstick into the oil tank but do not tighten the

oil tank cap.

6. Remove the dipstick.
7. Examine the oil level on the dipstick.
8. If the oil level is low, fill with engine oil and do a

check of the oil level again. The oil level is correct

when it is at the top mark on the dipstick.

To change the engine oil

WARNING: 

Engine oil is very hot directly

after the engine is stopped. Let the engine

become cool before you drain the engine oil.

If you spill engine oil on your skin, clean with

soap and water.

1. Operate the product until the fuel tank is empty.
2. Remove the ignition cable from the spark plug.
3. Remove the oil tank cap.
4. Put a container below the product to collect the

engine oil in.

5. Tilt the product to drain the engine oil from the oil

tank.

6. Fill with new engine oil of the type recommended in 

Technical data on page 15.

7. Do a check of the oil level. See 

To do a check of the

oil level on page 14.

To clean the air filter

CAUTION: 

Do not operate the engine

without an air filter attached or if the air filter

is dirty.

CAUTION: 

Replace the air filter if it cannot

be fully cleaned or if it is damaged. A

defective air filter causes damage to the

engine.

1. Push the latch tabs (A), remove the air filter cover

(B) and remove the air filter (C).(Fig. 40 )

2. Hit the air filter against a hard surface or blow

compressed air through the air filter from the clean

side of the air filter.

CAUTION: 

Do not use a brush to

remove dirt as this pushes the dirt into

the air filter.

3. Clean the air filter holder (D) and the air filter cover

with a moist cloth.

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