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21
CAUTION:
Turn off the engine before cleaning the air
Þ
lter! Never clean out the air
Þ
lter with compressed air! Do not clean the
pre-
Þ
lter and inner
Þ
lter with fuel.
The service life of the engine depends on the condition and regular maintenance of the
Þ
lter elements. Failure to
perform maintenance and cleaning at the prescribed intervals will cause increased wear inside the engine!
If the air
Þ
lter becomes damaged, replace immediately! Pieces of cloth or large dirt particles can destroy the engine!
Do not work in dusty conditions when it can be avoided! The
Þ
ne dust generated when dry-cutting concrete and stone
is hazardous to the health of the operator and also shortens the service life of the engine. Whenever possible, wet-cut
with water when working in concrete and stone, to bind the dust.
Pre-
Þ
lter
If the pre-
Þ
lter (
1
, Order No. 395 173 081) is dirty, wash it out
in lukewarm water with standard dishwashing liquid.
Rinse out pre-
Þ
lter thoroughly in running water.
Let the pre-
Þ
lter
dry thoroughly
.
NOTE:
The pre-
Þ
lter must be cleaned daily, or several times
daily if working under dusty conditions. If cleaning is not
possible on-site, have spare pre-
Þ
lters on hand. Replace the
pre-
Þ
lter at least every 25 operating hours.
To insert the pre-
Þ
lter in the
Þ
lter cover (
4
), position it so it
Þ
ts
the space in the cover and then press it in (
5
). The pre-
Þ
lter
must
Þ
t completely and cover all parts of the
Þ
lter space,
without leaving any spaces un
Þ
ltered.
Inner
Þ
lters
Wash out the dirty inner
Þ
lter (
3
,
Order No. 395 173 020) in
lukewarm soapy water with regular dishwashing liquid.
Let the inner
Þ
lter
dry thoroughly
.
Air
Þ
lter insert
The air
Þ
lter insert (
2
,
Order No. 395 173 011)
Þ
lters the in-
take air through a very
Þ
ne paper
Þ
lter lamella system. For
the reason the cartridge must never be washed. Clean the
air
Þ
lter insert once a week.
To clean the air
Þ
lter insert, spread it out slightly and care-
fully tap it against a clean surface.
Replace the air
Þ
lter insert every 100 operating hours.
Replace it immediately if there is a drop in power, drop in
speed, or smoke in the exhaust.
Before installing the
Þ
lter system, check the intake opening
to make sure no dirt particles have fallen in. If they have,
remove them.