Aftercooler Core - Clean/Test; Aftercooler Core - Inspect; Alternator - Inspect - Perkins 4008-30 Operation And Maintenance Manual

60
Maintenance Section

Aftercooler Core - Clean/Test

Aftercooler Core - Clean/Test
Personal injury can result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a
protective face shield and protective clothing.
Maximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
Note: The aftercooler is combined with the radiator.
The core of the aftercooler cannot be removed.
Perkins recommends that the individual uses the
most appropriate cleaning method for the application
and location. The core may be cleaned with a
suitable cleaner. The core must be dry before the
engine is operated.
1. Pressurized air is the preferred method for
removing loose debris. Direct the air in the
opposite direction of the fan's air flow. Hold the
nozzle approximately 6 mm (.25 inch) away from
the fins. Slowly move the air nozzle in a direction
that is parallel with the tubes. This will remove
debris that is between the tubes.
2. Pressurized water may also be used for cleaning.
The maximum water pressure for cleaning
purposes must be less than 275 kPa (40 psi). Use
pressurized water to soften mud. Clean the core
from both sides.
NOTICE
Do not use a high concentration of caustic cleaner to
clean the core. A high concentration of caustic
cleaner can attack the internal metals of the core and
cause leakage. Only use the recommended concen-
tration of cleaner.
3. Back flush the aftercooler with a suitable cleaner.
4. Steam clean the aftercooler to remove any
residue. Flush the fins of the aftercooler core.
Remove any other trapped debris.
5. Wash the aftercooler with hot, soapy water. Rinse
the aftercooler thoroughly with clean water.
i09727522
Personal injury can result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a
protective face shield and protective clothing.
Maximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
6. Dry the aftercooler with compressed air. Direct the
air in the reverse direction of the normal flow.
Remove all fluid from the aftercooler. Ensure that
the aftercooler is dry.
7. Inspect the aftercooler to ensure cleanliness.
Contact your Perkins distributor to pressure test
the aftercooler. If necessary, replace the
aftercooler. Contact your Perkins distributor for
more information.

Aftercooler Core - Inspect

The aftercooler is combined with the radiator, inspect
the aftercooler after the radiator and aftercooler has
been cleaned.
Inspect the aftercooler for damaged fins, corrosion,
dirt, grease, insects, leaves, oil, and other debris.
Bent fins may be opened with a "comb". Inspect
these items for good condition: Welds, mounting
brackets, air lines, connections, clamps, and seals.
Make repairs, if necessary.

Alternator - Inspect

Perkins recommends a scheduled inspection of the
alternator. Inspect the alternator for loose
connections and correct battery charging. Check the
ammeter (if equipped) during engine operation in
order to ensure correct battery performance and/or
correct performance of the electrical system. Make
repairs, as required.
Check the alternator and the battery charger for
correct operation. If the batteries are correctly
charged, the ammeter reading should be very near
zero. All batteries should be kept charged. The
batteries should be kept warm because temperature
affects the cranking power. If the battery is too cold,
the battery will not crank the engine. When the
engine is not run for long periods of time or if the
engine is run for short periods, the batteries may not
fully charge. A battery with a low charge will freeze
more easily than a battery with a full charge.
SEBU9077-02
i06533191
i02322311