CARE AND MAINTENANCE 7
MHL380 D 7.49
7.9.3 Air cleaner
All maintenance work on the air fil-
ter pipe must be carried out with the
engine switched off! Do not start
the diesel engine whilst the main
cartridge and safety cartridge are
removed.
Maximum engine protection against prema-
ture wear caused by dust is only possible if
the air cleaner is maintained at regular inter-
vals.
The air cleaner is designed to offer maximum
protection at long maintenance intervals.
Maintenance includes replacing filter ele-
ments.
For safety reasons, we do not recommend
washing out filter elements.
The air cleaner needs to be serviced as soon
as the indicator (197/39) lights up continuous-
ly. The indicator may light up briefly, but this is
circumstantial and is usually caused by the
engine speed being increased too quickly.
Smoky exhaust fumes and perceptibly lower
engine power can also be signs of a clogged
filter.
The corresponding main cartridge will need to
be replaced.
We strongly recommend replacing the
main cartridge (fig. 199/1) when the maxi-
mum permissible intake negative pressure
is achieved or at least once a year, which-
ever is sooner.
Installing and removing cartridges too fre-
quently may damage the seals between the
filter element and the filter body.
The safety cartridge needs to be replaced with
every fifth change of the main cartridge or at
least once a year, whichever is sooner.
Before installing a new element, the seals and
seal surface in the housing must be cleaned
carefully.
The discharge slot on the dust emptying valve
(198/5) should be opened by hand once a
week to ensure it does not jam due to high
relative humidity and dust.
Fig. 197 Air filter clogging
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