Kubota WSM J Series Workshop Manual page 150

J SERIES, WSM
(2) Disassembling and Assembling
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
Thermostat Assembly
1. Remove the thermostat cover mounting screws, and remove the
thermostat cover (1).
2. Remove the thermostat assembly (3).
(When reassembling)
• Apply a liquid gasket (Three Bond 1215 or equivalent) only at the
thermostat cover side of the thermostat cover gasket (2).
(1) Thermostat Cover
(2) Thermostat Cover Gasket
Water Pump Assembly
1. Loosen the alternator mounting bolts, and remove the fan belt.
2. Remove the fan and fan pulley.
3. Remove the water pump assembly from the gear case cover.
4. Remove the water pump flange (1).
5. Press out the water pump shaft (2) with the impeller (5) on it.
6. Remove the impeller from the water pump shaft (2).
7. Remove the mechanical seal (4).
(When reassembling)
• Apply a liquid gasket (Three Bond 1215 or equivalent) to the both
sides of gasket.
• Replace the mechanical seal with new one.
(1) Water Pump Flange
(2) Water Pump Shaft
(3) Water Pump Body
S-104
ENGINE
69.5 to 72.5 C
157 to 163 F
85 C
185 F
W10390350
(3) Thermostat Assembly
W10393690
(4) Mechanical Seal
(5) Impeller
W10395040
KiSC issued 10, 2016 A