5 Maintenance
Engine
t3921381
4
5
¾ Release the upper clips (4) at the suction
hose (5) and remove the hose.
¾ With the engine running, slowly close the
air filter suction opening by covering it (e.g.
with a board or a plate) until the air filter
indicator light (1) illuminates in the indicator
unit.
In order to avoid damage, the su
ction opening
must not be closed further afte
r the indicator
light has illuminated. If the a
ir filter indicator
light does not illuminate, con
tact your autho-
rised dealer.
¾ Reattach the hose (5).
Exchange air filter safety cartridge
NOTE
Read the information on the label on the air
filter housing. It indicates whether a safety
cartridge is installed in the air filter.
¾ Exchanging the safety cartridge:
• Two years after it has entered operation at
the latest.
• If the air filter vacuum display lights up again
immediately after the filter cartridge has
been serviced.
• If the filter cartridge is faulty.
CAUTION
Safety cartridges must not be cleaned or reused.
Do not start the engine without an air filter cartridge.
Thefunctionofthesafetycartridge is to prevent
ingress of dust while the main cartridge is being
exchanged or inadvertent use of a damaged main
cartridge.
¾ Switch off the engine.
¾ Open the bonnet.
134 Operating Instructions – 393 807 1001 EN – 08/2008
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