Kubota V3600-E3 Shop Manual page 89

V3-E3B SERIES, V3-E3CB SERIES, V3-E3BG SERIES, WSM
(A) EGR Cooler
(B) Thermo Valve
The EGR (Exhaust Gas Recirculation) cooler is used
to lower combustion temperature and efficiently cool
EGR gas, with the aim of reducing the NOx that is in the
exhaust gas of diesel engine.
The EGR cooler is placed between the exhaust
manifold and the intake manifold of the engine and
returns the cooled exhaust gases to the engine suction
side.
The EGR cooler has resistant to clogging up,
compact and efficient tubes internally.
(1) Pipe
(2) EGR Cooler
(3) Exhaust Manifold
(4) Flange
(5) Tube
Thermo valve controls boost pressure "ON / OFF" for
the EGR valve.
If the coolant temperature is low, thermo valve is
closed, so that boost pressure does not reach to the EGR
valve.
If the coolant temperature is high, thermo valve is
open, so that boost pressure reaches to the EGR valve.
(1) Thermo Valve
(2) Coolant Temperature
M-28
DIESEL ENGINE
A Coolant Inlet Port
B Coolant Outlet Port
W1175338
(a) Boost Pressure From Intake
Manifold
(b) Boost Pressure To EGR
Valve
(c) Open
(d) Close
W1175753