Cooling System; Air Injection" Centrifugal Cleaning; Winter Use - Husqvarna 439 Manual De Instrucciones

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 Clutch cover
3
1
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.
"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.
MAINTENANCE
5
1
4
2

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.
• Loosen the screws on the front handle and detach it
from its mounting.
• Loosen the screws that hold the starter against the
crankcase and remove the starter.
• Detach and replace the air guide plate (black) with the
air guide plate (blue) for winter use. Part number: 584
89 40-01.
• Detach the DF guide from the black air guide plate
and mount it on the blue air guide plate.
• Remove the air filter cover.
• Slide the grommet (blue) upwards from the closed
position to the open position. Use a screw driver.
–
English 37