Kubota M108S, Workshop Manual

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1-S17
M108S, WSM ENGINE
Thermostat Valve Opening Temperature
1. Push down the thermostat valve and insert a string between the
valve and the valve seat.
2. Place the thermostat and a thermostat in a container with water
and gradually heat the water.
3. Hold the string to suspend the thermostat in the water. When the
water temperature rises, the thermostat valve will open, allowing
it to fall down from the string.
Read the temperature at this moment on the thermometer.
4. Continue heating the water and read the temperature when the
valve has risen by about 8 mm (0.3 in.).
5. If the measurement is not acceptable, replace the thermostat.
W1071639
(4) Turbocharger
Turbine Side
1. Check the exhaust port (3) and inlet port (5) side of turbine
housing (1) to see if there is no exhaust gas leak.
2. If any gas leak is found, retighten the bolts and nuts or replace
the gasket (2) / (4) / (6) with new one.
W1076917
Compressor Side
1. Check the inlet hose (1) of the compressor cover (3) to see if
there is no air leak.
2. Check for loose connections or cracks in the suction side of the
intake hose.
3. If any air leak is found, change the clamp (2) and or inlet hoses.
W1077032
Radial Clearance
1. If the wheel contact to the housing, replace the turbocharger
assembly with new one.
W1077353
Thermostat’s valve
opening temperature
Factory spec.
74.5 to 78.5
°
C
166.1 to 173.3
°
F
Temperature at which
thermostat completely
opens
Factory spec.
90
°
C
194
°
F
(1) Turbine Housing
(2) Gasket
(3) Exhaust Port (4) Gasket
(5) Inlet Port
(6) Gasket
(1) Inlet Hose
(2) Clamp (3) Compressor Cover
KiSC issued 06, 2007 A