Kubota GR1600EU Workshop Manual page 101

GR1600EU, 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.
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 (0.2 in.).
4. If the measurement is not within the factory specifications,
replace the thermostat.
Thermostat's valve
Factory specification
opening temperature
Temperature at which
thermostat completely Factory specification
opens
Radiator Cap Air Leakage
1. Set a radiator tester (1) and an adaptor (2) (BANZAI Code No.:
RCT-2A-30S) on the radiator cap.
2. Apply the specified pressure (80 kPa, 0.9 kgf/cm
measure the time for the pressure to fall to 60 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 specification
(1) Radiator Tester
Radiator Water Leakage
1. Pour a specified amount of water into the radiator.
2. Set a radiator tester (1) (Code No. 07909-31551) and an
adapter (2) (BANZAI Code No.: RCT-2A-30S) and raise the
water pressure to the specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pinhole, repair with the radiator
cement.When water leak is excessive, replace the radiator.
Radiator water leakage
Factory specification
test pressure
(1) Radiator Tester
1-S15
ENGINE
80.5 to 83.5 °C
176.9 to 182.3 °F
95 °C
203 °F
9Y1210595ENS0010US0
9Y1210595ENS0011US0
2
, 10 psi), and
More than
10 seconds for pressure
fall from
80 to 60 kPa
(from 0.9 to 0.6 kgf/cm
from 10 to 9 psi)
(2) Adapter
9Y1210595ENS0012US0
160 kPa
2
1.6 kgf/cm
23 psi
(2) Adapter
9Y1210595ENS0013US0
KiSC issued 11, 2013 A
2
,
2
,