Kubota M5640SU Workshop Manual page 102

M5640SU, M5640DT-SU, WSM
Fan Belt Damage and Wear
1. Check the fan belt for damage.
2. If the fan belt is damaged, replace it.
3. Check if the fan belt is worn and sunk in the pulley groove.
4. If the fan belt is nearly worn out and deeply sunk in the pulley
groove, replace it.
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
Radiator Cap Air Leakage
CAUTION
• When removing the radiator cap, wait at least ten minutes
after the engine has stopped and cooled down. Otherwise,
hot water way gush out, scalding nearby people.
1. Set a radiator tester (Code No.: 07909-31551) 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.
1-S14
ENGINE
9Y1210365ENS0008US0
69.5 to 72.5 °C
157.1 to 162.5 °F
85 °C
185 °F
9Y1210365ENS0009US0
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)
9Y1210365ENS0010US0
KiSC issued 07, 2009 A