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6. COOLING SYSTEM MXU 550EXi/MXU500i
INSPECTION
Visually inspect the thermostat for damage. Thermostat
Heat the water with an electric heating Thermometer
element to operating temperature for five
minutes.
Suspend the thermostat in heated water to
check its operation.
Keep flammable materials away from
the electric heating element.
Do not let the thermostat or
thermometer touch the pan, or you will
get false readings.
Replace the thermostat if the valve stays
open at room temperature, or if it respond at
temperatures other than those specified.
Thermostat begin to open:
80-84°C (176-183°F)
Valve lift:
8 mm (0.3 in) minimum at 95°C (203°F)
Air Bleed Hole
INSTALLATION
Install the thermostat into the housing with
its air bleed hole facing up and aligning
bleed hole with the tab in the housing.
Tab Align
6-9