Disassembling, Inspecting And Reassembling Cooling System; Disassembling And Inspecting Thermostat10-3; Inspecting Thermostat - Mitsubishi Heavy Industries SL Series Service Manual

2. Disassembling, inspecting and reassembling cooling system

2.1 Disassembling and inspecting thermostat
Disassembling sequence
1 Thermostat cover

2.2 Inspecting thermostat

Be careful of burns or a fire when measuring tempera-
ture, as it involves a high-temperature and open flame.
To test the thermostat operation, immerse the thermostat in a
container filled with water. Heat the water, while measuring
the water temperature. Record the temperature at the
conditions shown in the table below. If the temperatures are
not within the standard range, replace the thermostat.
Note: (a) Stir the water in the container with a stick to
ensure uniform temperature distribution.
(b) Before installing the thermostat, be sure to check
the valve opening temperature stamped on the
thermostat valve side face.
Temperatuve
Temperatuve at which valve starts
opening
Temperatuve at which valve lift is 8 mm
[0.32 in.]
Disassembling and inspecting thermostat
2 Thermostat
Standard
82 ± 1.5°C
[179.6 ± 2.7°F]
95°C
[203°F]
1
Replace
2
3
3 Thermostat case
Stir hot water well
Inspecting thermostat
COOLING SYSTEM
10-3