Bedienungsanleitung Husqvarna LB 253S (Seite 12 von 356) (Alle Sprachen)

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Maintenance Daily Weekly Monthly

Examine the cutting cover and protective cover* X

Examine the engine brake handle* X

Examine the battery* X

Examine the muffler* X

Examine the spark plug X

Change the oil (the first time after 5 h use, then after each 50 h use) X

Change the air filter (after 50 h use) X

Examine the fuel system X

To do a general inspection

• Make sure that all nuts and screws on the product

are tightened correctly.

To clean the product externally

• Use a brush to remove leaves, grass and dirt.

• Make sure that the air intake on the top of the engine

is not blocked.

• Do not use a high pressure washer to clean the

product.

• If you use water to clean the product, do not flush

water directly on the engine.

To clean the inner surface of the cutting

cover

1. Empty the fuel tank.

2. Put the product on its side with the muffler down.

CAUTION: If the product is put with the

air filter down, the engine can become

damaged.

3. Hose down the inner surface of the cutting cover

with water.

To clean the gear housing

1. Remove the cover.

2. Use a brush to remove leaves, grass and dirt from

the gear housing. (Fig. 31)

3. Clean with water if you cannot remove all the dirt

with the brush.

To examine the cutting equipment

WARNING:

To prevent accidental start

remove the ignition cable from the spark

plug.

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. 32)

2. Remove the blade bolt (A). (Fig. 33)

3. Remove the blade (B).

4. Examine the blade support (C) and blade bolt to see

if there are damages.

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

bent.

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

angled ends of the blade point in the direction of the

cutting cover. (Fig. 34)

7. Put the friction washer (D) and the blade against the

blade support (C).

8. To put the blade at the center of the engine shaft,

make sure that you can see the blade support marks

on each side of the blade.

9. Lock the blade with a block of wood. Attach the

spring washer (E) and tighten the bolt and washer

with a torque of 80 Nm. (Fig. 35)

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

freely.

135 - 006 -

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