Husqvarna P 520D Operator's Manual page 130

4. Remove the air filter cartridge from the filter housing.
5. Clean the inner surface of the air filter housing with a
dry cloth.
6. Hit the air filter cartridge carefully against a hard
surface and blow with compressed air on the inner
surface. Replace the air filter if it does not become
clean or if it is damaged.
7. Remove the inner air filter behind the air filter
cartridge.
8. Hit the inner air filter against a hard surface to clean
it. Replace the air filter if it does not become clean or
if it is damaged.
CAUTION: Do not use compressed air
to clean the inner air filter.
9. Put the inner air filter and the air filter cartridge in
their initial positions in the filter housing. Make sure
that the air filter cartridge is correctly attached on top
of the air intake.
10. Attach the air filter cover and make sure that the
particle collector points down.
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To clean and replace the inlet filter
on the air condition
1. Loosen the 2 knobs on the fan system cover and
remove the cover.
2. Pull out the filter holder.
3. Lift out the inlet filter.
4. Carefully clean the inlet filter with a brush.
5. If the inlet filter does not become clean, replace it.
6. Put the inlet filter into the filter holder.
7. Attach the filter holder and tighten the knobs.
To replace a fuse
A broken fuse is identified by a burned connector.
1. Remove the cover to get access to the broken fuse.
a) To replace the safety fuse, remove the engine
cover. The safety fuse is in a holder on top of the
battery.
b) To replace the feeder fuse, remove the engine
cover. The feeder fuse is in the left holder in front
of the battery.
c) To replace the fuse for the power outlet, remove
the right side cover. The fuse for the power outlet
is in the electrical connection box.
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