Kubota D1703-BE User Manual

M.3 COOLING SYSTEM
92.4mm STROKE SERIES WSM, 01092
COOLING SYSTEM
[I] GENERAL
~109F014
(1) Radiator
(2) Suction Fan
(3) Thermostat
(4) Water Pump
(5) Cylinder Head
(6) Cylinder Block
The cooling system consists of a radiator (1) (not
included in the basic engine), centrifugal water
pump
(4), suction fan (2) and thermostat (3).
The water is cooled through the radiator core, and
the fan
set behind the radiator pulis cooling air
through the core to improve cooling.
The water pump sucks the cooled water, forces it
into the cylinder block and draws out the hot water.
[2] WATER PUMP
Then the cooling is repeated. Furthermore, to
control temperature of water,
a thermostat is
provided in the system. When the thermostat opens,
the water moves directly to radiator, but when
it
closes, the water moves toward the water pump
through the bypass between thermostat and water
pump. The opening temperature of thermostat
is
approx. 71°C (159.8"F).
A109F020
The water pump is driven by the crankshaft via a
V-belt. Water cooled in the radiator is sucked into
the water pump from
its lower portion and is sent
from the center of the water pump impeller
(4)
radially outward into the water jacket in the
crankcase.
(1) Rearing Unit
(2) Water Pump Body
(3) Mechanical Seal
(4) Water Pump impeller
M-15

Kubota D1703-BE Specifications

General

Brand	Kubota
Model	D1703-BE
Category	Engine
Language	English