Maintenance
GB
1
8) Inspection of Thermostat
1. Loosen cover installation bolts 1, remove them, and then
remove cover 2 and thermostat 3.
2
3
2.
3.
3
4.
a a
5.
3-20
Hang thermostat 3 in the water contained in vessel.
Put thermometer in the water, and warm up water to
measure valve opening temperature.
Put a piece of thread in the closed valve gap and
hang it in the water. Valve opening moment can
be known when thermostat is released to drop
due to opening with rise of temperature.
Valve Opening Temperature:
58.5 - 61.5˚C (137 - 143˚F)
Measure valve lift a of thermostat when prescribed
temperature has been reached. Replace if the length is
less than specified value.
Water Temperature
Valve Lift a
75˚C (167˚F) 4.5 mm (0.177 in) or more
Install thermostat, new gasket and cover.
Thermostat Cover Bolt:
6 N · m (4 lb · ft) [0.6 kgf · m]
2st X50D2 2011
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