
Maintenance of major parts
- 135 -
5.4. Thermostat
5.4.1. General descriptions and main data
●
The thermostat maintains a constant tem-
perature of coolant (90 - 95°C) and
improves thermal efficiency of the engine
by preventing heat loss.
●
Namely, when the temperature of coolant
is low, the thermostat valve is closed to
make the coolant bypass to directly enter
the water pump; when the coolant tem-
perature rises to open wide the thermo-
stat valve, the bypass circuit is closed
and the water passage to the radiator is
opened so that the coolant is forced to
flow into the radiator.
5.4.2. Inspecting
●
Check the wax pallet and spring for dam-
age.
●
Put the thermostat in a container of
water, then heat the water slowly and
check temperature with a thermometer.
If the valve lift is 0.1 mm (starting to open)
at temperature of 71°C (Opening tem-
perature) at and 8 mm or more (opening
wide) at temperature of 85°C (Full open-
ing temperature), the thermostat is nor-
mal.
EAMC002I
Bypass
valve
To bypass tube
To radiator
From cooling
water pipe
Item
Specification
Part No.
300738- 00159 300738-00161
Type
Wax-pallet type
Open temperature
71°C
83°C
Full open temperature
85°C
95°C
Valve lift
8 mm or more
EFM2055I
Ruler
Thermometer
Woodplate
No.
Opening
temperature
Full opening
temperature
300738 -00159
71°C
85°C
300738-00161
83°C
95°C
Содержание GV158TIC
Страница 1: ...950106 058010EN GV158TIC GV180TIC GV222TIC GAS GENERATOR ENGINE Operation Maintenance Manual...
Страница 2: ......
Страница 6: ...6 Engine Installation 143 6 1 Installing 143 6 2 Inspection Prior to Installation 144 Appendix...
Страница 130: ...Electrical equipment 124...
Страница 148: ...Maintenance of major parts 142...
Страница 152: ...Engine installation 146...
Страница 162: ...Appendix 156...