SEBU8121 53
Maintenance Section
Aftercooler Core - Clean/Test
i01853891
Afte rc ooler Co re - Clean/Test
1. Remove the core
. Refer to the OEM information
for the correct procedure.
2. Turn the after
cooler core upside-down in order
to remove debris.
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 recommend ed concentration of
cleaner.
3. Back flush the core with a suitable cleaner.
4. Steam clean t
he core in order to remove any
residue. Flush the fins of the aftercooler core.
Remove any other trapped debris.
5. Wash the core with hot, soapy water. Rinse the
core thoroughly with clean water.
Personal in
jury can result from air pressure.
Personal injury can result without following prop-
er procedur
e. 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.
6. Dry the core
with compressed air. Direct the air in
the reverse direction of the normal flow.
7. Inspect the
core in order to ensure cleanliness.
Pressure test the core. If necessary, repair the
core.
8. Install the core. Refer to the OEM information for
the correct procedure.
i01841503
Afte rc ooler Core - Ins pect
Note: Adjust the frequency of cleaning according to
the effec
ts of the operating environment.
Inspect the aft
ercooler 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 inj
ury 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 p
ressure at the nozzle must be less
than 205 kPa (30 psi) for cleaning purposes.
Pressurized
air is the preferred method for removing
loosedebris.Directtheairintheoppositedirection
of the fan’s air flow. Hold the nozzle approximately
6mm(.25inc
h) 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.
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 in order to soften mud. Clean the core from
both sides.
Use a degreaser and steam for removal of oil and
grease. Clean both sides of the core. Wash the core
with deter
gent and hot water. Thoroughly rinse the
core with clean water.
After cle
aning, start the engine and accelerate the
engine to high idle rpm. This will help in the removal
of debris and drying of the core. Stop the engine.
Usealigh
t bulb behin d the core in order to inspect
the core for cleanliness. Repeat the cleaning, if
necessary.
Inspect the fins for damage. Bent fins may be opened
witha“comb”.
Note: If parts of the aftercooler system are repaired
or replaced, a leak test is highly recommended.
Inspect these items for good condition: Welds,
mounting brackets, air lines, connections, clamps,
and seal
s. Make repairs, if necessary.
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