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MAINTENANCE
36 – English
”Air Injection” centrifugal
cleaning
Centrifugal cleaning means the following: All air to the
carburetor passes through the starter. Dirt and dust is
centrifuged 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:
The intermediate wall is designed so it can be adjusted for
running in cold weather, so that preheated air from the
cylinder can pass into the carburettor space preventing
icing of the air filter, etc. Lift off the air filter to obtain better
access. Use a screwdriver to carefully knock away the
plug in the partition.
For temperatures below -5°C and/or in snow conditions a
special cover is available, which is mounted on the starter
housing.
Part number: 522 98 66-01.
These reduce the flow of cooling air and prevent large
amounts of snow from being sucked into the carburetor
space.
Heated handles
550XPG, 550XPG TrioBrake
On models with the model code XPG both the front
handle bar and the rear handle are equipped with
electrical heating coils. These are supplied with electricity
from a generator built into the chain saw.
When the switch is pushed upwards, the heat is switched
on. When the switch is pushed downwards, the heat is
switched off.
Electrical carburetor heating
550XPG, 550XPG TrioBrake
On models with the designation XPG there is an
electrically heated carburetor. Electrically powered
heating prevents ice formation in the carburetor. A
thermostat regulates the heating so that the carburetor
always has the right working temperature.
IMPORTANT! If the temperature rises above 23°F (-
5°C) or 32°F (0°C) respectively, the starter housing
cover MUST be removed and the accompanying plug,
art. no. 503 40 59-01 fitted in the hole in the partition
wall. Otherwise there is a risk of overheating, resulting
in severe damage to the engine.