Husqvarna LB 248S Operator's Manual page 12

Maintenance
Examine the fuel system
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. 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. 32 )
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
12
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 (A).(Fig. 34 )
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. 35 )
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. 36 )
10. Pull the blade around by hand and make sure 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. 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.
Daily Weekly Monthly
135 - 004 - 21.11.2017
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