Engine Air Cleaner Service Indicator - Inspect; Engine Air Precleaner - Check/Clean; Test The Service Indicator; Engine Crankcase Breather Element - Replace - Perkins 1104D-E44T Operation And Maintenance Manual

SEBU9066
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 50
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.

Engine Air Cleaner Service Indicator - Inspect

If the service indicator does not reset easily, or if the
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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.
Engine Air Precleaner - Check/
Clean
Illustration 51
Typical engine air precleaner
(1) Wing nut
(2) Cover
(3) Body
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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.
Engine Crankcase Breather
Element - Replace
Ensure that the engine is stopped before any servic-
ing or repair is performed.
1. Place a container under canister (2).
Maintenance Recommendations
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NOTICE
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