Control Of Intake And Exhaust System; Pre-Cleaner; Outline Of Pre-Cleaner; Structure Of Pre-Cleaner - Kubota D1803-CR-E4 Workshop Manual

4. ENGINE
4.4 Control of intake and exhaust
system
• See DPF control
• See common rail system
RELATED PAGE
3.4 Control of common rail system (CRS) engine on
page 4-17
9.4 Control of diesel particulate filter (DPF) system on
page 4-76

4.5 Pre-cleaner

4.5.1 Outline of pre-cleaner

The pre-cleaner removes large debris from the intake
air.

4.5.2 Structure of pre-cleaner

The pre-cleaner is made up of a body and cover.

4.5.3 Function of pre-cleaner

Removal of large debris prior to entering the air cleaner
enables raising the maintenance interval of the air
cleaner

4.5.4 Specification of pre-cleaner

Airflow range
4-40
3
Max. 2.5 m /min.
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4

4.6 Air cleaner

4.6.1 Outline of air cleaner

The air cleaner removes debris etc. from the engine
intake air.

4.6.2 Structure of air cleaner

The air cleaner is made up of an air cleaner, housing,
element, and dust cup. Clean air is essential to
satisfactory performance and long engine life.
The air cleaner must be able to remove fine materials
such as dust and blown sand as well as chaff, or lawn
from the air.
(1) Air cleaner housing
(2) Secondary element
(3) Primary element

4.6.3 Function of air cleaner

The air cleaner removes debris etc. from the engine
intake air.
It also reduces noise generated by air intake.

4.6.4 Specification of air cleaner

Cleaning efficiency
Operating temperature range

4.7 Turbocharger

4.7.1 Outline of turbocharger

The turbocharger uses the engine exhaust gas to
compress intake air.
The turbocharger increases engine output.
MECHANISM
4. Intake and exhaust system
(4) Dust cup
(5) Evacuator valve
99.9% or higher
-30 to 80 ℃
-22 to 176 ℉
KiSC issued 12, 2018 A