Operation and maintenance manual

52 SEBU7833-03
Maintenance Section
Aftercooler Core - Clean/Test
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Afte rc ooler Co re - Clean/Test
1. Remov e the core
. Refer to the OEM information
for the correct procedure.
2. Turn the after
cooler core upside-down in order to
remove debris.
Personal injury can result from air pressure.
Personal inju
ry can result without following prop-
er procedure. When using pressure air, wear a pro-
tective face shi eld and protective clothing.
Maximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
3. Pressurized air is the preferred method for
removing loose debris. Direct the air in the
opposite dir
ection 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 para
llel with the tubes. This will remove
debris that is between the tubes.
4. Pressurize
d water may also be used for cleaning.
The maximum water pressure for cleaning
purposes must be less than 275 kPa (40 psi). Use
pressuriz
ed water in order to soften mud. Clean
thecorefrombothsides.
NOTICE
Do not use a high concentration of caustic cleaner to
clean the c
ore. A high concentration of caustic cleaner
can attack the internal metals of the core and cause
leakage. Only use the recommended concentration of
cleaner.
5. Back flush the core with a suitable cleaner.
6. Steam clea
n the core in order to remove any
residue. Flush the fins of the aftercooler core.
Remove any other trapped debris.
7. Wash the core with hot, soapy water. Rinse the
core thoroughly with clean water.
Personal injury can result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a pro-
tective face shield and protective clothing.
Maximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
8. Dry the core with compressed air. Direct the air in
the reverse direction of the normal flow.
9. Inspect the core in order to ensure cleanliness.
Pressure test the core. If necessary, repair the
core.
10. Install the core. Refer to the OEM information for
the correct procedure.
11. After cleaning, start the engine and accelerate
theenginetohighidlerpm.Thiswillhelpinthe
removal of debris and drying of the core. Stop the
engine. Use a light bulb behind the core in order
to inspect the core for cleanliness. Repeat the
cleaning, if necessary.
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Aftercooler Core - Inspect
Note: Adju
st the frequency of cleaning according to
the effects of the operating environment.
Inspect th
e aftercooler for these items: damaged fins,
corrosion, dirt, grease, insects, leaves, oil, and other
debris. Clean the aftercooler, if necessary.
For air-to-air aftercoolers, use the same methods that
are used for cleaning radiators.
Personal
injury can result from air pressure.
Personal injury can result without following prop-
er proced
ure. When using pressure air, wear a pro-
tective face shield and protective clothing.
Maximum a
ir pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.