3-31
3
4st 9.9/15/20 2008
5. Install thermostat, new gasket and cover.
25) Inspection of Thermostat
1. Loose thermostat cover nut and remove thermostat 1.
4. Measure valve lift 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) 3.0mm (0.12in) or over
2. Hang thermostat 2 in the water contained in vessel.
3. Put thermometer in the water, warm up water and measure
water temperature when valve opens.
2
a
Thermostat Cover Bolt :
6 N
·
m (4 lb
·
ft) [0.6 kgf
·
m]
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.
24) Inspection of Propeller
1. Check propeller blades and spline for cracks, damages,
wear and corrosion. Replace if necessary.
Valve Opening Temperature :
60±1.5°C (140 ± 3°F)
(Valve starts to open at this temperature.)
E_MFS20C_ch03_090105.qxd 09.1.20 5:23 PM ページ 31
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