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96
Maintenance Section
Engine Air Cleaner Service Indicator - Inspect
2. Release the clips (4) and remove the end cover (3)
from air cleaner body (1).
3. Remove the primary air filter element (2) and
remove the secondary air filter element (not
shown) from air cleaner body (1). Ensure that the
inner body of the air cleaner is clean and free from
dirt. Ensure that the inner of the air cleaner cover ,
(3) is clean and free from dirt.
4. Install a new secondary air filter element (not
shown). Install a new primary air filter element (2)
and install end cover (3). Ensure that the clips (4)
are located securely.
Engine Air Cleaner Service
Indicator - Inspect
(If Equipped)
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 and 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 clean
side of the air cleaner housing or in a remote
location.
Illustration 85
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 service indicator core
when the engine is run at full load speed. The core
should latch approximately at the greatest vacuum
that is attained.
If the service indicator does not reset easily, or if the
i06103548
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 plugged.
If necessary, replace the service indicator more
frequently in environments that are severely dusty.
Replace the service indicator annually regardless of
the operating conditions. Replace the service
indicator when the engine is overhauled, and
whenever major engine components are replaced.
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).
Engine Mounts - Inspect
Note: The engine mounts may not have been
supplied by Perkins. Refer to the Original Equipment
Manufacturer (OEM information for further details on
the engine mounts and the correct bolt torque.
Inspect the engine mounts for deterioration and for
correct bolt torque. Excessive engine vibration can
be caused by the following conditions:
• Incorrect mounting of the engine
• Deterioration of the engine mounts
• Loose engine mounts
Any engine mount that shows deterioration should be
replaced. Refer to the OEM information for the
g00103777
recommended torques.
When the engine mounts are supplied by Perkins the
maintenance procedure will be supplied in the
Disassembly and Assembly manual for your engine.
M0076814-03
i07819538
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