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English – 35
MAINTENANCE
Cooling system
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1 Air intake on the starter.
2 Air guide plate.
3 Fins on the flywheel.
4 Cooling fins on the cylinder.
5 Cylinder cover (directs cold air over the cylinder).
Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder.
Note! The cooling system on a chain saw with catalytic
converter must be cleaned daily. This is particularly important
on chain saws with catalytic converters, because the higher
exhaust temperature requires efficient cooling of the engine
and the catalytic converter unit.
”Air Injection” centrifugal cleaning
Centrifugal cleaning means the following: All air to the
carburetor passes through the starter. Dirt and dust is pushed
out by the cooling fan.
IMPORTANT! In order to maintain operation of the centrifugal
cleaning system it must be regularly maintained. Clean the air
intake to the starter, the fins on the flywheel, the space around
the flywheel, inlet pipe and carburetor compartment.
Winter use
Running problems can occur when using the machine in the
cold and snowy conditions caused by:
• Too low engine temperature.
• Icing of the air filter and carburetor.
Special measures are therefore often required:
• Partly mask the air inlet on the starter to increase the
working temperature of the engine.
• Preheat the intake air to the carburetor by using the heat
from the cylinder.
Temperature 0°°
°°
C (32°°
°°
F) or colder:
A special winter kit, including necessary parts and assembly
instructions, is available for using the machine in cold
temperatures.
Before usage a hole is made in the cylinder cover and a winter
flap is fitted (see illustration below). Twist the winter flap so
that preheated air from the cylinder can pass into the
carburetor space preventing icing of the air filter, etc.
For temperatures below -5°C (23°F) and/or in snow
conditions there is also:
• a special cover (A) for the starter housing
• a winter plug (B) for the air nozzle that is fitted as shown.
These reduce the flow of cooling air and prevent large
amounts of snow from being sucked into the carburetor
space.
For further information see assembly instructions for the
winter kit.
CAUTION! When the winter plug is fitted the winter flap must
be open!
1
2
5
4
3
IMPORTANT! If the temperature rises above -5°C (23°F) or
0°C (32°F) respectively the machine MUST be restored to
its normal set-up. Otherwise there is a risk of overheating,
which can cause severe engine damage.