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MAINTENANCE
40 – English
115 09 86-95 Rev.2 2007-11-27
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.