Husqvarna 122HD45 Operator's Manual page 11

Maintenance
Make sure that the gear housing is filled with grease.
Do a check of all cables and connections.
To adjust the idle speed
1. Clean the air filter and attach the air filter cover.
2. Start the product. Refer to
cold engine on page 9 .
3. Turn the idle adjustment screw T clockwise until the
cutting unit starts to move. (Fig. 25)
4. Turn the idle adjustment screw counterclockwise
until the cutting unit stops.
WARNING: If the cutting unit does not
stop when you adjust the idle speed,
speak to your nearest servicing dealer.
Do not use the product until it is correctly
adjusted or repaired.
Note: The idle speed is correct when the engine
operates smoothly in all positions. Refer to
data on page 13 for the recommended idle speed.
To clean the cooling system
The cooling system keeps the engine temperature
down. The cooling system includes the cooling fins on
the cylinder (A), the cylinder cover (B) and the air intake
through the crankcase (C).
(Fig. 26)
CAUTION: The air intake between the fuel
tank and crankcase, is easily blocked by
leaves. Clean the air intake fully.
(Fig. 27)
1. Clean the cooling system with a brush weekly or
more frequently if it is necessary.
2. Make sure that the cooling system is not dirty or
blocked.
To examine the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
994 - 007 - 08.09.2020
To start the product with a
Technical
operation
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 13 . (Fig. 28)
• Replace the spark plug if it is necessary.
To clean the air filter
Clean the air filter regularly from dirt and dust. This
prevents carburetor malfunctions, starting problems,
loss of engine power, wear to engine parts and more
fuel consumption than usual.
1. Remove the air filter cover (A).
2. Remove the filter (B) from the filter frame. (Fig. 29)
3. Clean the filter with warm soap water.
Note: An air filter that is used for a long time can not
be fully cleaned. Replace the air filter regularly and
always replace a defective air filter.
4. Make sure that the filter is dry.
5. Apply oil to the air filter. Refer to
foam air filter on page 11
6. Clean the inner surface of the air filter cover. Use
compressed air or a brush.
To apply oil to the foam air filter
CAUTION: Always use Husqvarna special
air filter oil. Do not use other types of oil.
WARNING: Put on protective gloves. The air
filter oil can cause skin irritation.
1. Put the foam air filter in a plastic bag.
2. Put the oil in the plastic bag.
3. Rub the plastic bag to supply the oil equally across
the foam air filter.
4. Push the unwanted oil out of the foam air filter while
in the plastic bag. (Fig. 30)
To lubricate the gear housing
• Use Husqvarna special grease. Speak to your
servicing dealer for more information about
recommended grease.
• Add the grease through the cap on the gear housing.
(Fig. 31)
Before After 40 After 100
h
Technical data
To apply oil to the
h
X
X
11