Download MAINTENANCE INTERVALS - Safety

SEBU7781-02
107
Maintenance Section
Engine Air Filter Service Indicator - Inspect/Replace
i02005700
Replace
Engine Air Filter Service
Indicator - Inspect/Replace
Replace the service indicator if the following
conditions exist:
SMCS Code: 7452-040; 7452-510
• The machine is used in a severely dusty
environment.
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.
• The engine is overhauled.
• Major components are replaced.
Replace the service indicator annually regardless of
the operating conditions.
Note: When a new service indicator is installed,
excessive force may crack the top of the service
indicator. Tighten the service indicator to a torque
of 2 N·m (18 lb in).
Inspect
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Engine Air Precleaner - Clean
SMCS Code: 1055-070
NOTICE
Service the air cleaner only with the engine stopped.
Engine damage could result.
Illustration 153
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The air filter service indicator is located near the air filter housing.
Observe the air filter 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
1. Check for ease of resetting. The service indicator
should reset in less than three pushes.
2. Check the movement of the yellow core when the
engine is accelerated to the engine rated speed.
The yellow core should latch approximately at the
greatest vacuum that is attained.
3. 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 air
line for the service indicator may be plugged.
Illustration 154
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1. Remove the precleaner.
2. Inspect the air inlet screen for dirt and for trash.
Remove the screen. Clean the screen if the
screen is dirty.
3. Inspect the precleaner tube openings. Remove
dirt and debris.
4. Clean the precleaner with compressed air or wash
the precleaner in warm water. Dry all the parts.
5. Install the precleaner screen.