Maintenance and Care
4.6 Air Filter Maintenance
The air filter separates and retains dirt before the air reaches the combustion chamber. This reduces engine wear.
Fig. 3a, Type 444
Fig. 3b, Type 450
Regular maintenance increases engine life.
Clogged air filters cause performance loss and increased fuel consumption. This leads to a higher toxin level in the exhaust gas and also makes starting more difficult.
When the machine is used all day, the air filter should be cleaned daily. In severe dust conditions clean more often in between.
For a simple cleaning procedure we recommend tapping the air filter.
Never use a high pressure air cleaner nor wet or moist cleaning. Do not use solvent or oil bath cleaners!
If engine rpm's tend to drop although the carburettor adjustments are perfectly set, the air filter cartridge is clogged and must be replaced by a new one (Type 444:
(Type 450:
Never do realignments on the factory carburettor settings in order to balance a clogged air filter system. This procedure would cause engine damages due overload of the engine.
Warranty claims cannot be accepted for damaged engine parts caused by improper care and maintenance
For removal of the air filter, remove filter cover. Remove filter cover screw (Fig. 1 Pos. 8).
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