ahlmann AS 150, Operating Instructions Manual, Page: 74 / 113

S150/S151/S152/Z152 8-13
Maintenance 8
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8.2.12 Servicing/Changing the airfilter
NOTE
The filter insert requires attention when the
maintenance indicator (8-28/1) shows red, or
after 12 months, which ever is sooner.
(1) Open the engine hood.
(2) Unscrew both wing screws on the top of the mainte-
nance grid (8-28/2). Push the grid outside in the upper part
and lift it.
(3) Loosen the two fastening clamps on the air filter lid
(8-29/1) and remove the air filter lid.
(4) Pull out the filter cartridge (8-29/2) by carefully turning
it back and forth.
(5) Clean the filter cartridge.
ATTENTION
- For cleaning, use a compressed air gun to
which a pipe (angled at 90°) has been
attached. The pipe must be sufficiently long
to reach the cartridge bottom. Use dry
compressed air of no more than 5 bar to blow
out the cartridge by moving the pipe back and
forth in the interior of the cartridge. Cleaning
may be stopped when dust formation ceases.
- Do not use petrol or hot liquid for cleaning.
(6) Use a hand-held inspection lamp to check the filter
cartridge for damage to the cartridge paper or the rubber
gasket. If the cartridge or seals are damaged, replace the
cartridge.
(7) Re-insert the filter cartridge carefully.
(8) Install the air filter lid on the filter housing in such a way
that the direction arrow in the “OBEN-TOP” mark points
upward. This ensures that the dust removal valve is pointing
down.
(9) If the service indicator (8-28/1) previously showed red,
press the reset button. The indicator should now be clear.
(10) Re-install the maintenance grid (8-28/2).
ATTENTION
Before starting the engine, check the connecting
pipes and hose on the airfilter unit for signs of
damage.
8.2.13 Changing the safety cartridge
ATTENTION
- The safety cartridge must not be cleaned.
- The safety cartridge must be replaced after
the filter cartridge has been maintained/
cleaned 5 times, or every two years at the
latest.
- Make sure that no dirt or dust can enter the
filter housing during replacement of the safety
cartridge.
Fig. 8-28
Fig. 8-29
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