Husqvarna LB 144 Operator's Manual page 13

CAUTION:
with the air filter down, the engine can
become damaged.
3. Hose down the inner surface of the cutting cover
with water.
To examine the cutting equipment
WARNING:
remove the ignition cable from the spark
plug.
WARNING:
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. 31)
2. Remove the blade bolt and spring washer.
3. Remove the blade.
4. Examine the blade support 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, point the angled
ends of the blade in the direction of the cutting cover.
(Fig. 32)
7. Make sure that the blade is aligned with the center of
the engine shaft.
8. Lock the blade with a block of wood. Attach the
spring washer and tighten the bolt and washer with a
torque of 44-46 Nm. (Fig. 33)
9. Pull the blade around by hand and make sure that it
turns freely.
WARNING:
The blade is very sharp and cuts can
easily occur.
2172 - 003 - 24.08.2023
If the product is put
To prevent accidental start
Use protective gloves
Use heavy duty gloves.
10. 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:
damage to the engine. Do a check of the oil
level before you start the product.
1. Put the product on level ground.
2. Remove the oil tank cap with the attached dipstick.
3. Clean the oil from the dipstick.
4. Put the dipstick fully into the oil tank to give a correct
picture of the oil level.
5. Remove the dipstick.
6. Examine the oil level on the dipstick.
7. If the oil level is low, fill with engine oil and do a
check of the oil level again.
Note:
Use a funnel to prevent spill.
To replace the engine oil
WARNING:
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.
(Fig. 34)
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 or drain the engine oil from the oil
tank with an oil pump (accessory).
6. Fill with new engine oil of the type recommended in
Technical data on page 17 .
7. Do a check of the oil level. Refer to
the oil level on page 13 .
Air filter
A dirty air filter can cause the engine to be damaged
or not operate correctly. Do maintenance on the air
filter more frequently in dusty conditions. Refer to
Maintenance schedule on page 12 for information about
when to replace the air filter.
Note:
Always replace a damaged air filter.
A too low oil level can do
Engine oil is very hot
To do a check of
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