Kubota WG972-E2 Workshop Manual page 88

WG972-E2, DF972-E2, 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.
(A) Good
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 mm (0.315 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
S-18
GASOLINE / LPG ENGINE
(B) Bad
W1021108
69.5 to 72.5 °C
157.1 to 162.5 °F
85 °C
185 °F
W1035849
KiSC issued 01, 2006 A