Husqvarna LB 448S. Профи 9678633-01 - Инструкция по эксплуатации - Страница 13

Maintenance

Daily

Weekly

Monthly

Replace the oil (the first time after 5 h use, then after each 25 h use and

yearly)

X

Replace the air filter

X

Examine the fuel system

X

Examine and adjust the drive (clutch wire)

X

To do a general inspection

• Make sure that the nuts and screws on the product

are tightened.

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. 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.

2. Hose down the inner surface of the cutting cover

with water.

To examine the drive belt and clean

the gear housing

1. Remove the 4 screws on the belt guard and remove

the belt guard.(Fig. 24 )

2. Examine the drive belt and belt pulley for damages.
3. Use a brush to remove leaves, grass and dirt from

the gear housing.(Fig. 25 )

To replace and adjust the drive belt

1. Remove the 4 screws on the belt guard and remove

the belt guard.(Fig. 26 )

2. Put a flat screwdriver between the hubcap and the

wheel on the right front wheel of the product.

3. Twist the screwdriver carefully to remove the

hubcap.

4. Remove the wheel bolt and remove the wheel.(Fig.

27 )

5. Remove the drive belt from the belt pulleys.
6. Make sure that the belt pulleys move easily on the

axle.

7. If it is necessary, spray penetrating oil between and

behind the belt pulleys and lubricate the axle.

8. Install a new drive belt and attach it correctly at the

ball bearing before you adjust the drive belt.(Fig. 28 )

9. Move the ball bearing up or down to adjust the drive

belt.(Fig. 29 )

Note: 

A new drive belt becomes longer after use.

Adjust the drive belt again after some hours of

operation.

10. Attach the belt guard.
11. Operate the product to make sure that the drive belt

is correctly installed and adjusted.

To replace and adjust the center belt

1. Remove the blade.

Note: 

This step is not necessary when you only

adjust the center belt.

2. Loosen the adjustment screws some turns, but do

not remove them.(Fig. 30 )

3. Replace the center belt and moderately tighten the

adjustment screws.

Note: 

This step is not necessary when you only

adjust the center belt.

4. Move the gear forward or rearward to adjust the

center belt.(Fig. 31 )

5. Use a hook scale to examine the tension of the

center belt. The belt has the correct tension when it

can move 6–10 mm in the center. That is equal to a

pull of 3 kg.(Fig. 32 )

6. Tighten the adjustment screws fully with a torque of

3 Nm.

7. Operate the product to make sure that the drive belt

is correctly installed and adjusted.

To examine the cutting equipment

WARNING: 

To prevent accidental start

remove the ignition cable from the spark

plug.

741 - 002 - 11.10.2018

13