Inspecting Thermoswitch; Inspecting Thermostat; Inspecting Water Pump For Smooth Rotation10-4 - Mitsubishi Heavy Industries SL Series Service Manual

COOLING SYSTEM

2.3 Inspecting thermoswitch

Both water and the thermoswitch become hot. Pay
attention to prevent burn and fire.
Immerse the temperature-senser in oil and measure the
resistance while raising the oil temperature. If the resistance
extremely deviates from the standard, replace the
thermoswitch.
Temperatuve Standard
105°C
Reassembling thermostat
30 mΩ
[221°F]

2.4 Inspecting thermostat

2.4.1 Inspecting water pump for smooth rotation
Check to make sure that the impeller and shaft of water
pump rotate smoothly without noise and irregularities. If
faulty, replace the water pump assembly.
Checking impeller and shaft for smooth rotation
10-4