Air Filtration System; Air Cleaner; Operation; General Service Information - Komatsu 830E Shop Manual

AIR CLEANER

Operation

Intake air, required by the diesel engine and by the
truck air system, passes through the air cleaner assem-
blies 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 air compres-
sor inlet line is connected to the engine filtered air
supply.
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 entering 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 circular motion is set
up causing dust and dirt particles to be thrown from
the air stream into dust collector cups. 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.

General Service Information

1. Inspect dust collector cups (1, Figure 5-1) at
regular intervals - daily inspection is recom-
mended. Never allow dust level build up to the
tube chamber
FIGURE 5-1. AIR CLEANERS
1. Dust Collector
2. Precleaner Section
C05012 4/98

AIR FILTRATION SYSTEM

3. Element Cover
Air Filtration System
2. Check filter restriction gauges, during operation.
The filters should be cleaned or replaced when the
gauges read between 20 and 25 inches H
uum or when a warning message is presented on
the overhead display by the HMS system. Refer
to Filter Service Procedure for maintenance and
cleaning instructions.
3. Check to insure air inlet is not obstructed, plugged
or damaged.
4. Check all connections between air cleaner outlet
and engine intake manifold to insure they are tight
and make a positive seal.
5. Check all air cleaner housing capscrews to insure
they are tight.

MAIN FILTER ELEMENT

Removal
Remove and inspect the main filter element as outlined
below.
The truck engine must be shut down before serv-
icing the air cleaner assemblies or opening the
engine air intake system.
1. Shut down engine. Clean dirt and dust off air
cleaner assembly exterior surfaces.
2. Loosen large wing nut (5, Figure 5-2) on air cleaner
cover to free main element assembly (10). Pull
main element clear of assembly.
3. Inspect filter element carefully for possible dam-
age, holes, breaks, etc., which might affect reuse
of element. If element appears serviceable other
than being dirty, proceed with the cleaning proce-
dure. If defects are found in filter element, wing
nut assembly (5) must be removed from element
assembly and installed on the new filter element.
4. Check safety filter element indicator nut (7). If solid
red area is showing, safety filter service is re-
quired. If center is green, safety element does not
require replacement.
O vac-
2
C5-1