Kubota SM-E4B Series User Manual

ENGINE
SM-E4B SERIES, WSM
1-S18
CAUTION
• When removing the radiator cap, wait at least ten minutes after the engine has stopped and cooled down.
Otherwise, hot water may gush out, scalding nearby people.
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Radiator Cap Air Leakage
1. Set a radiator tester (1) and an adaptor (2) on the radiator cap.
2. Apply the specified pressure of 88 kPa (0.90 kgf/cm
2
, 13 psi),
and measure the time for the pressure to fall to 59 kPa
(0.60 kgf/cm
2
, 8.5 psi).
3. If the measurement is less than the factory specification,
replace the radiator cap.
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Radiator Water Leakage
1. Pour a specified amount of water into the radiator.
2. Set a radiator tester (1) and an adaptor (2) and raise the water
pressure to the specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pinhole, replace the radiator or repair
with the radiator cement. When water leak is excessive, replace
the radiator.
NOTE
• The pressure of the leak test is different from each radiator
specification.
Thus, do the leak test, refer to the test pressure of each
radiator specification.
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Thermostat Valve Opening Temperature
1. Suspend the thermostat in the water by a string with its end
inserted between the valve and seat.
2. Heating the water gradually, read the temperature when the
valve opens and leaves the string.
3. Continue heating and read the temperature when the valve
opens approx. 8.0 mm (0.31 in.).
4. If the measurement is not within the factory specifications,
replace the thermostat.
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Pressure falling time Factory specification
More than 10 seconds for
pressure fall
88 → 59 kPa
(0.90 → 0.60 kgf/cm
2
,
13 → 8.5 psi)
(1) Radiator Tester (2) Adaptor
Radiator water leakage
test pressure
Factory specification
No leak at specified
pressure
(1) Radiator Tester (2) Adaptor
Thermostat's valve
opening temperature
Factory specification
69.5 to 72.5 °C
157.1 to 162.5 °F
Temperature at which
thermostat completely
opens
Factory specification
85 °C
185 °F
KiSC issued 01, 2013 A

Kubota SM-E4B Series Specifications

General

Brand	Kubota
Model	SM-E4B Series
Category	Engine
Language	English