Kubota L3540 Workshop Manual page 116

L3540, L4240, L5040, L5240, L5740, WSM
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.
Radiator Cap Air Leakage
1. Set a radiator tester and an adaptor on the radiator cap.
2. Apply the specified pressure 88 kPa (0.9 kgf/cm
measure the time for the pressure to fall to 59 kPa (0.6 kgf/cm
9 psi).
3. If the measurement is less than the factory specification, replace
the radiator cap.
Pressure falling time Factory spec.
Radiator Water Leakage
1. Pour a specified amount of water into the radiator.
2. Set a radiator tester and an adaptor 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.
Radiator water leakage
Factory spec.
test pressure
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. 6 mm (0.236 in.).
4. If the measurement is not within the factory specifications,
replace the thermostat.
Thermostat's valve
Factory spec.
opening temperature
Temperature at which
thermostat completely Factory spec.
opens
1-S16
ENGINE
2
, 13 psi), and
2
,
More than 10 seconds
for pressure fall from
88 to 59 kPa
2
(from 0.9 to 0.6 kgf/cm ,
from 13 to 9 psi)
W10387530
No leak at 137 kPa
2
1.4 kgf/cm
20 psi
W10389070
69.5 to 72.5 °C
157.1 to 162.5 °F
85 °C
185 °F
W1035849
KiSC issued 04, 2010 A