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Precleaner Section Cleaning
The tubes in precleaner section (2, Figure 5-1)
should be cleaned at least once per year and at each
engine overhaul. More frequent cleaning may be
necessary depending upon operating conditions and
and the local environment.
To inspect the tubes in the precleaner section,
remove the main filter element. Do not remove the
safety filter element. Loosen the clamps and remove
dust collector (1, Figure 5-2). Use a light to inspect
the tubes. All tubes should be clear and the light
should be visible.
NOTE: Both the main and safety elements must be
installed in the air cleaner while Steps 1 and 2 are
being accomplished to prevent any possibility of dirt
being forced into the engine intake area.
Dust can be removed with a stiff fiber brush (see
Figure 5-5). Do not use a wire brush. Dust may also
be removed effectively using compressed air.
Heavy plugging of the tubes may require soaking and
washing the entire precleaner section. Refer to the
following procedure.
FIGURE 5-5. REMOVING DUST FROM THE
TUBES
C05019
NOTE: The precleaner section may be separated
from the air cleaner assembly without removing the
entire air cleaner from the truck.
1. Remove air intake cover (3, Figure 5-1).
Remove the mounting hardware that secures
the precleaner section to the air cleaner
assembly. Remove the precleaner section. The
safety filter element must remain in place to
protect the engine intake.
2. Loosen the clamps and remove dust collector
(1) from the precleaner section. Wash the dust
collector with a water and liquid soap solution.
3. Submerge the precleaner section in a solution
of Donaldson D-1400 and warm water (see
Figure 5-6). Mix the solution according to the
directions on the package. The tube section
must be down. Soak for 30 minutes, then
remove the precleaner section from the
solution. Rinse thoroughly with fresh water and
blow dry.
Severe plugging may require the use of an
Oakite 202 and water solution instead. The
solution should be 50% Oakite 202 and 50%
fresh water.
4. Check the precleaner gaskets carefully for any
evidence of air leaks. Replace if necessary.
5. Install the precleaner section and gaskets on
the air cleaner assembly. Install all mounting
hardware that was removed.
6. Install the dust collector and gasket on the
precleaner section. Secure the dust collector
with mounting clamps.
FIGURE 5-6. WASHING AND SOAKING THE
Air Filtration System
PRECLEANER SECTION
C5-7
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