Air Filter - Husqvarna K 760 Workshop Manual

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AIR FILTER

Function
Husqvarna Active Air Filtration is a filter system that sig-
nificantly improves the K760 model. The improved centrifugal
cleaning has now made the previous plastic foam filter obsolete.
1. The centrifugal cleaning is the first step in the air clea-
ning of the inlet air. The fins and inlet nozzle are newly designed
and the amount of dust per volume of air has been halved com-
pared to previous models.
The fins on the flywheel supply the cylinder with cooling air
while they are also the active part in the centrifugal cleaning of
the engine's inlet air. An inlet nozzle is fitted next to the fins on
the flywheel. The centrifugal force means that large particles do
not follow the curved air currents to the nozzle, but are thrown
to the outside of the nozzle. Only very small dust particles manage
to curve with the air currents to the inlet.
2. The paper filter now has a more dust absorbing surface
area compared to its predecessor K750. The distribution chamber
in front of the paper filter spreads the air flow evenly over the
filter surface.
3. Service filter's sole task is to prevent foreign objects from
entering the engine during service work. The service filter should
only be replaced if it is damaged.
Filter service
1. Centrifugal cleaning
The inlet duct should be inspected and any deposits removed in
connection with filter replacement. Dust from dry cutting is
blown clean using compressed air. Material from wet cutting nor-
mally needs to be scraped off mechanically.
Make sure the rubber seal on the upper air duct cover is intact
and that it is correctly fitted in the cylinder cover!
2. Paper filter
The paper filter must not be cleaned but replaced, whenever
necessary, with a new filter. The replacement frequency is highly
dependent on the material to be cut and if the cutting is to be
wet or dry. Change the filter when the machine starts to lose
power.
Observe extreme caution when the filter is removed to ensure
that no dust particles fall down through the service filter.
Removal of waste and cleaning of the gasket around the service
filter is best done using a vacuum cleaner.
Also blow out the dust collected in the distribution chamber.
3. Service filter
The service filter only needs replacing if damaged.
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