SEBU8325-01 51
Maintenance Section
Aftercooler Core - Clean/Test
i02690449
Afte rc ooler Core - C lean/Tes t
1. Remove the cor
e. Refer to the OEM information
for the correct procedure.
2. Turn the afte
rcooler core upside-down in order to
remove debris.
Personal injury can result from air pressure.
Personal i
njury can result without following prop-
er procedure. When using pressure air, wear a pro-
tective fac e shield 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
opposit
e 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.
4. Pressu
rized water may also be used for cleaning.
The maximum water pressure for cleaning
purposes must be less than 275 kPa (40 psi). Use
press
urized water in order to soften mud. Clean
thecorefrombothsides.
NOTICE
Do not use a high concentration of caustic cleaner to
clea
n the core. A high concentration of caustic cleaner
can attack the internal metals of the core and cause
leakage. Only use the recomm ended concentration of
clea
ner.
5. Back flush the core with a suitable cleaner.
6. Ste
am clean 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.
i02690
450
Aftercooler C ore - Inspect
Note:
Adjust the frequency of cleaning according to
the effects of the operating environment.
Insp
ect the 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.
Per
sonal 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.
Ma
ximum air pressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
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