C05019 Air Filtration System C5-3
AIR CLEANERS
OPERATION
Air required by the diesel engine passes through the
air cleaner assemblies mounted on each side of the
radiator. These air cleaners discharge heavy
particles of dust and dirt by centrifugal action and
then remove finer particles by passing air through
filter cartridges.
The engine demand for air creates a vacuum in the
air cleaners and causes outside air to be drawn in
through air inlets on the air cleaners. Dirty air enter-
ing here is drawn through a series of tubes that are
designed to produce a cyclonic action. As the air
passes through the outer portion of the tubes, a cir-
cular motion is set up causing dust and dirt particles
to be thrown from the air stream into dust collectors
(1, Figure 5-1). At the same time, the air stream turns
and is directed up through the center of the tubes into
the filter chamber. Here the air passes through the
main filter element and safety filter element and out
the clean air outlet to the engine's air intake system.
The function of the safety filter is to increase overall
reliability and engine protection.
SERVICING THE AIR CLEANERS
The engine must be turned off before servicing
the air cleaner assemblies or opening the engine
air intake system. Never start the engine with the
filter elements removed. Serious engine damage
can result.
• Inspect and empty dust collector cups at regular
intervals. Daily inspection is recommended.
Never allow the dust level to build up to the tube
(precleaner) chamber.
• During operation or after the engine has been
turned off, observe the air filter restriction gauges
mounted on the overhead panel in the cab. When
a gauge shows maximum restriction, filter service
is required.
• Check all engine air inlet tubes, hoses and
clamps. All connections must be air tight to
prevent dirt from entering.
• Air cleaner housing fasteners and mountings
must be tight.
• After the filters have been serviced, reset the air
filter restriction gauges by pressing the reset
button on the face of the gauge.
FIGURE 5-1. AIR CLEANERS
1. Dust Collectors
2. Precleaner Section
3. Air Intake Cover
4. Element Cover
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