21
2.6 Air Inlet System
2. Engine Description
2.6.1 Air Inlet System
Engine requires fresh, clean, cool, and
sufficient quantity of air to burn the fuel
and satisfactory performance.
Clean air is required to avoid unnecessary
wear & tear of engine componant.
Air Intake System consist of Pre-cleaner,
Air cleaner, Hose & Air Inlet Manifold.
Pre-cleaner - Air enters pre-cleaner
through angled fins which causes air swirl.
Thus heavier dust particles are collected
in plastic dust bowl.
Figure above shows the construction of
oil bath air cleaner used on HA series
engines.
Oil bath air cleaner are generally used for
light duty application.
The filtration efficiency of oil bath air
cleaner is 96 - 98%.
Figure above shows the construction of
dry type air cleaner used on HA series
engines. Dry type air cleaners are generally
used for earth moving, construction
equipments.
The filtration efficiency of Dry type air
cleaner is 98.9 - 99.9%.
Generally two elements are used in this
type of air cleaner - Main element & Safety
element.
Restriction indicator is provided for all
dry type air cleaners.
Cleaning of filter element is required when
restiction indicator shows red signal even
after engine has stopped.
Second
stage
Cleane air to
engine
First
stage
Lube oil
Dust
accumulated
in dust bowl
Dust
bowl
Pre-cleaner
Fresh air from
atmosphere
Wire-mesh
element
Vaccuator
Valve
Safety
element
Air inlet
Housing
Wire clamps
Cover
PU
element
Mounting
Strap
Safety support
tube
Filtered
air to
engine
Insert for
restiction
indicator
mounting
Summary of Contents for HA 294
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Page 38: ...35 4 1 Lube Oil 4 2 Fuel 4 Operating Media...
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Page 42: ...39 5 1 Maintenance Schedule 5 2 Maintenance Work Completed 5 Routine Maintenance...
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Page 72: ...69 7 1 Diagnosis Chart 7 Faults Causes Remedies...
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