NOTICE
Never service the air cleaner element with the engine
running since this will allow dirt to enter the engine.
A wide variety of air cleaners may be installed for use
with this engine. Consult the OEM information for the
correct procedure to replace the air cleaner.
i02335405
Engine
Air
Cleaner
Service
Indicator
-
Inspect
Some
engines
may
be
equipped
with
a
different
service
indicator.
Some
engines
are
equipped
with
a
differential
gauge
for
inlet
air
pressure.
The
differential
gauge
for
inlet
air
pressure
displays
the
difference
in
the
pressure
that
is
measured
before
the
air
cleaner
element
and
the
pressure
that
is
measured
after
the
air
cleaner
element.
As
the
air
cleaner
element
becomes
dirty,
the
pressure
differential
rises.
If
your
engine
is
equipped
with
a
different
type
of
service
indicator,
follow
the
OEM
recommendations
in
order
to
service
the
air
cleaner
service
indicator.
The
service
indicator
may
be
mounted
on
the
air
cleaner
element
or
in
a
remote
location.
Illustration 44
g00103777
Typical service indicator
Observe the service indicator. The air cleaner
element should be cleaned or the air cleaner element
should be replaced when one of the following
conditions occur:
• The yellow diaphragm enters the red zone.
• The red piston locks in the visible position.
Test the Service Indicator
Service indicators are important instruments.
• Check for ease of resetting. The service indicator
should reset in less than three pushes.
• Check the movement of the yellow core when the
engine is accelerated to the engine rated speed.
The yellow core should latch at the greatest
vacuum that is attained.
If the service indicator does not reset easily, or if the
yellow core does not latch at the greatest vacuum,
the service indicator should be replaced. If the new
service indicator will not reset, the hole for the service
indicator may be restricted.
The service indicator may need to be replaced
frequently in environments that are severely dusty.
i05967804
Engine
Air
Precleaner
-
Check/
Clean
(If
Equipped)
Illustration 45
g00287039
Typical example
(1) Wing nut
(2) Cover
(3) Body
Remove wing nut (1) and cover (2). Check for an
accumulation of dirt and debris in body (3). Clean the
body, if necessary.
After cleaning the precleaner, install cover (2) and
wing nut (1).
Note:
When the engine is operated in dusty
applications, more frequent cleaning is required.
SEBU8119-04
81